https://www.oihdesigns.com/geokit daily 0.75 2025-02-10 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565889628694-OA3NRX0YMVMPW5XJZ6US/_DSC4136.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606168161985-WUU9N7AH5BO52M7T7EZA/Product+Photos5686_2880p.jpg Geology Kit The Geology Kit, Full Size, Aluminum https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606168138988-N99QKY7W5X7QQCJ6I104/Product+Photos5696_2880p.jpg Geology Kit The Geology Kit, Half Size, Acrylic https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606168232762-7C2O49FO4RMJW6W92WZ9/Product+Photos5706_2880p.jpg Geology Kit The Geology Kit, Oversized, Acrylic https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606175037327-A67MBKZB43EV0ELQAMZ6/Product+Photos5694_2880p.jpg Geology Kit A Full-Size Acrylic MultiBoard Geology Kit with all included accessories. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565897398808-V17Q88WVUJN0J0TJ70K8/2019-07-02+20.44.58.jpg Geology Kit Climbing around to get a better view of the rocks with a Half-Size MultiBoard attached to a backpack. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565990231383-OU5S8GZ2VGC5PFBWWE3H/_DSC4861.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565897405232-HP0AF8EUP8FYAA7UEMOU/2019-06-01+11.25.41.jpg Geology Kit Mountain Biking with a Singleboard on a carabiner. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565897389484-OM5DGK2KFRQXDTOSAF1P/2019-07-07+19.19.56.jpg Geology Kit Carrying a Half-Size MultiBoard with a Shoulder Strap https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565990267942-YAQKTU8PU46GQTHT3QGS/_DSC3976.jpg Geology Kit Singleboard with Shoulder Strap https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606173257256-GQ7WBZLFQN514WA0ZDY5/Product+Photos5684_2880p.jpg Geology Kit Binder pocket on left side, clipboard clip on the right https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174234880-FJ64DAFIFGBH8ZVBU7YU/Product+Photos5689_2880p.jpg Geology Kit Shown with an added binder pouch that goes under the binder pocket to hold a protractor, ruler, etc. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606173534301-LZNILT5IH6E702M6Q0IN/Product+Photos5697_2880p.jpg Geology Kit Binder Pocket on Left, Double Elastic on Right https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575243012102-BP3UR3PCVJ17YV6DMOEU/19-11-29_AntiWindClipboard2344_2880.jpg Geology Kit Wire Spring Clip on Front https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174698439-QLSSIVFPNM6J6449DW3C/Product+Photos5695_2880p.jpg Geology Kit Clipboard clip on front. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576261855973-KW3WCJRJMDIPJ1H076P2/image-asset.jpeg Geology Kit Map only: If you don’t need the second panel. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606173720080-NTN6CX4S2N0NYE6XGCGC/Product+Photos5715_2880p.jpg Geology Kit Double elastic on left, clip on right (shown on oversized MultiBoard) https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174648919-H1XAYANZSR5EOY3ZP9E2/Product+Photos5685_2880p.jpg Geology Kit Double elastic on front. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1578688168262-9OCV26KE4XU2SS3WW89E/MultiBoard+FS+12.24832_2880.jpg Geology Kit Add a third panel for on-the-fly additional storage. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1578688241255-4NCZ2RH5LWVQS1J010WX/MultiBoard+FS+12.24839_2880.jpg Geology Kit Quickly add or remove a third panel. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226230193-OG1W9IMQ2PU1BIM9TSB3/19-11-29_AntiWindClipboard2238.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575298626311-SYUVG9XHLFKK1GPJY5AQ/19-11-29_Full+Size+MultiBoard+V122855_2880.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226209117-RT559FOI5H1JL1LDULH8/19-11-29_AntiWindClipboard2236.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575297826773-CFY684A84J3GCTW1HWHC/20190930_GeoTripA73_086.jpg Geology Kit SingleBoard showing the elastic strap holding a corner of the notebook down. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606173863806-0HAS0XJDL5O43XQX3DMR/Product+Photos5692_2880p.jpg Geology Kit Emergency Protractor Showing ~30° East of North. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575296780870-46XXJ32Z2NSOI5JK0WJL/2019-05-17+18.45.47.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565990438023-ZDIEQ2OKFONC65UQWEFV/2019-06-30+14.11.08.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606173996039-ERBKMXFK7WK3Z0KSN0EL/2020-10-03+18.32.43.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174055872-ROSM1ARO3NCEL5S2VAY7/Product+Photos5687_2880p.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1572132024956-FDBNP10KCK1ESA1Y606V/20191004_A73_102.jpg Geology Kit This spot is worth stopping at if you’re driving through Utah on I-70. Only a few minutes off the Interstate. More photos and directions here. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576261384046-85MTDA59DTNSBCR2NRC3/20191204+MultiBoard+Studio2914_2880.jpg Geology Kit Ready for notetaking. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576261336735-MSGKN2JQASVBV66I6EGA/20191204+MultiBoard+Studio2906_2880.jpg Geology Kit Easily swap between fieldwork and deskwork modes. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449506500-263M9DI1MIIM9BTIXS7Y/2019-08-20+11.33.21.jpg Geology Kit - Storm coming through means it's testing time. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567356996150-0OL77UJP5RUD2SSZ8618/2019-08-20+11.32.04.jpg Geology Kit - It's wet and windy but the map stays in place. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449509419-OVRVRHVKPH4LY95EDIGV/2019-08-20+11.42.20.jpg Geology Kit - Guess I'll get a coffee and work outside. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449520925-9V1H5WU0JRKPZR13KKAF/2019-08-20+11.48.06.jpg Geology Kit - No problems. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449524866-GP4FKQWIAGPJ1ZCVJ2VN/2019-08-20+11.55.15.jpg Geology Kit - The notebook is also usable in the wind. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449531632-Y42HU50FTDSG0SKT8APG/2019-08-20+12.02.31.jpg Geology Kit - Every is wet, but that's okay, because: https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567449535540-X8SDUHT2MDL6OGLLKYOA/2019-08-20+12.06.23.jpg Geology Kit - Easily dismantle everything in just a minute or two to let it dry faster. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174092502-N840B5LK5R8HXGMUOZAU/Product+Photos5686_2880p.jpg Geology Kit Full Size https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174109885-89J3NVR5376SED2JQE3L/Product+Photos5696_2880p.jpg Geology Kit Half Size https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174852808-L3IY2T04P60LP4JQQS2P/Product+Photos5706_2880p.jpg Geology Kit Oversized Version https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174156428-XQMIM8OM1MMTW76MV5HE/Product+Photos5702_2880p.jpg Geology Kit Half Size SingleBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606174179247-E5I4SH81HCQ18NJJM1JV/Product+Photos5695_2880p.jpg Geology Kit Half Size MultiBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603477788746-4AKS6SM4QPG6KGT9MPVU/Clipboards5170_2880p.jpg Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1578687484928-5SSMFR3G55J1ISCR6PRP/MultiBoard+FS+12.24842_fullsize.jpg Geology Kit The MultiBoard Geology Kit, Standard, Without Accessories. https://www.oihdesigns.com/othermultiboarduses daily 0.75 2020-01-10 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565975574381-A1ZSN7I9RJZFPX01CDF2/_DSC8970.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567450657851-DE1CO6MI9BKGHIRUM1MN/_DSC0049.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452499270-9DV0ZDBBUNAP0WCJ977P/20190827_a7iii_118_MultiBoard_2000p.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452541670-VMZ63PFZ5XC5GZXAXQHY/20190827_a7iii_073_MultiBoard_2000p.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565982432158-LC2WN2ANY9DAYAQVM5C7/_DSC8970.jpg The MultiBoard for Class, Lab, and Life 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https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565982053350-QNVBZOSUK0TTABAZM2Q4/_DSC3618_HalfRes.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452524149-S69F2HCZUGLAOXTYDOBI/20190826_a7iii_036_MultiBoard_2000p.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452599265-4FEXE05NGCI5BVQ1AEA9/20190827_a7iii_050_MultiBoard_2000p.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452804539-XMM9CZUKD7BH660DE5OA/_DSC3515_HalfRes.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452844893-OZMKNF0O2RZWE57X9AIK/_DSC8924.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452841211-ADKKXN2PO5HKLXI83T6V/_DSC8935.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452911154-DFRU0RDU65Q9L3B9TY57/_DSC4486.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452911930-13WXWVSWVAWEXZYDLK6R/_DSC4488.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452913635-9KCU00TOQBZFRO2UAF7S/_DSC4493.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567453029635-ZK822AAAJGW86WYNJ907/_DSC4520.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565988360993-ZURUALXAGX0RXQWP84QM/_DSC3612_HalfRes.jpg The MultiBoard for Class, Lab, and Life https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567452088855-SPRDTPO65P42I22WNHT3/_DSC3605_HalfRes.jpg The MultiBoard for Class, Lab, and Life https://www.oihdesigns.com/geoprotractor daily 0.75 2020-06-05 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983063891-9HJBXLWFFH5J5I8QRN92/_DSC3842_HalfRes.jpg Geology Protractor https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983063891-9HJBXLWFFH5J5I8QRN92/_DSC3842_HalfRes.jpg Geology Protractor - Our "Fluorescent Red" Acrylic Geology Protractor https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565972737967-FJWRJN8UYK5WBOI04XWC/Geology+Protractors Geology Protractor - We Offer Different Sizes And Materials https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983302196-T4FX9J5LW19IDEPZMSSE/_DSC3882_HalfRes.jpg Geology Protractor - Our Fluorescent Red Protractor Shown In A Geo Kit MultiBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983364692-DPCOJIMOI543Q2O6UQ9E/_DSC4007.jpg Geology Protractor - Spot the Protractor https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983364156-M1UB8YNDQZQKC57OTYLJ/_DSC4015.jpg Geology Protractor - Highly visible, even at dusk https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565983063891-9HJBXLWFFH5J5I8QRN92/_DSC3842_HalfRes.jpg Geology Protractor https://www.oihdesigns.com/oversized-singleboard daily 0.75 2019-09-01 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566492895147-KCZUUGUO7FDBJYVVV73H/image-asset.jpeg Oversized SingleBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567361660787-YQX5WZ41HD6GE56KW2H8/_DSC8984.jpg Oversized SingleBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567361679855-X3AFVGXPKGEGM4G8CE6O/_DSC8983.jpg Oversized SingleBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1567361712709-H4XOJ82S4I7M6GQJV8J8/_DSC8988.jpg Oversized SingleBoard https://www.oihdesigns.com/wind-resistant-clipboard daily 0.75 2020-11-21 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575221196885-Q0Z0A9SZ2N43MVZX8QOC/19-11-29_AntiWindClipboard2212.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597427807328-R6F297P7ECE719M7KKKC/Clipboard2304_2880p.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603476224857-BRYLO4PP6A2ZL3ZR81SV/Clipboards5181_2880p.jpg Wind Resistant Clipboard A silicone non-slip button on polycarbonate arm holds your paper in place. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603476312005-U7LTLMN6C1WWBLSL2Q96/Clipboards5182_2880p.jpg Wind Resistant Clipboard The buttons rotate out of the way when not needed. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974297254-KXHPN850C3JVE7B7J90U/Product+Photos5670_2880p.jpg Wind Resistant Clipboard Notebook in Place https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974240105-TR4R5AOJ7KFSKRZHD74P/Product+Photos5647_2880p.jpg Wind Resistant Clipboard Loose-Leaf Paper with spring clip https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974268269-RI7JGKJYE8R6WTZ2MCTU/Product+Photos5678_2880p.jpg Wind Resistant Clipboard Notebook style. (Board has white film left in place for the sake of clarity) https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974342321-A4HL3ANYPA63QLXIQRVP/Product+Photos5675_2880p.jpg Wind Resistant Clipboard Legal Pad Detail https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974403739-YSSML2G4KIHULTAQ363W/Product+Photos5653_2880p.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575224927312-54BV1LU8KUHE2CBBKY4A/19-11-29_AntiWindClipboard2262.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1605974427420-15NOGHPCPBUCIZGVIXVP/Product+Photos5655_2880p.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575224836889-AYYB7ZOMVOD2UXC4ZTPO/19-11-29_AntiWindClipboard2249.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575224762964-OOUEV8T52G6VO32M2S9F/19-11-29_AntiWindClipboard2241.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226209117-RT559FOI5H1JL1LDULH8/19-11-29_AntiWindClipboard2236.jpg Wind Resistant Clipboard Straight Shaft, No Grip Wooden Pencil https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226230193-OG1W9IMQ2PU1BIM9TSB3/19-11-29_AntiWindClipboard2238.jpg Wind Resistant Clipboard “Comfort grip” Mechanical Pencil with side lead-feed button https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226144572-5NI6MSUGQE75CMP5LT4S/19-11-29_AntiWindClipboard2167.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226170872-YGIPNF59U1JWF0HNVNX0/19-11-29_AntiWindClipboard2189.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603476457613-UT9407AFRRISEYCLUAB1/Clipboards5175_2880p.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226607446-GJ84GN6H0QSADBLUP4AD/19-11-29_AntiWindClipboard2305.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575226579102-UGDHFQXV10XER8SGRA1S/19-11-29_AntiWindClipboard2302.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575229527478-S201422AANIR758UJ5J2/19-11-29_AntiWindClipboard2323.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1575229587447-AMVODN0GRY8142LF4FP5/19-11-29_AntiWindClipboard2324.jpg Wind Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603476543007-EQ7N9THC9WKWV4YSX248/Clipboards5196_2880p.jpg Wind Resistant Clipboard https://www.oihdesigns.com/clocks daily 0.75 2019-12-13 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576262496147-Y2PL6JTMWVLT7H679KUG/19-12-05_Wall+Clock2972_2880.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576262711383-Y5PFF9Q29QPXSQANT072/19-12-05_Wall+Clock2971_2880.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576262934012-XCF2BTVES7FDKMRAAJAZ/19-12-05_Wall+Clock2975_2880.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576262977219-TFH5Q00RX3AVCQUI9CIZ/19-12-05_Wall+Clock2976_2880.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576262732481-83IRAL1WO6IDSPKHBVMX/19-12-05_Wall+Clock2978_2880.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576263414644-67WVGBJ3SD1XR4BXUE50/2019-12-13+12.55.36.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576263455157-ONYSDY17WCAUQ74SLTQL/2019-12-12+18.41.51.jpg Clocks https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1576263272151-WZH04JRLGD01E25I9RS6/2019-12-12+18.41.35.jpg Clocks https://www.oihdesigns.com/penholder daily 0.75 2020-06-05 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585152106698-QZ7RARYDZEJAR9W1AMFA/Pen+Holders5495_2880p.jpg Pen Holder https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585155001582-5SK0PA3AFN40WNMGO31S/Pen+Holders5462_2880p.jpg Pen Holder Holds thin wood pencils. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585154897169-X3T11KLMFWK86DT5BQNT/Pen+Holders5468_2880p.jpg Pen Holder Holds thick mechanical pencils. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585154942154-D0YU7BHBRXNOBW0HJK4I/Pen+Holders5471_2880p.jpg Pen Holder Holds both at the same time (independently). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585155290091-W14GASVTUD64MGSYW5R6/image-asset.jpeg Pen Holder Detail of above. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585264473488-04V7IITT3KH1GOCS6722/Pen+Holders5449_2880p.jpg Pen Holder Flat Version, uninstalled https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585330514853-TN4A9PXT8E3GNLLMCFWB/Pen+Holders5491_2880p.jpg Pen Holder Flat Version holding a Pen https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585264523090-2DSNLQ321HYM91YPNMSH/Pen+Holders5478_2880p.jpg Pen Holder Flat Version Installed. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585330547538-P7PYF9HNACTHLF2SOF9Y/image-asset.jpeg Pen Holder Flat Version holding a marker and pen. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585264637413-GYSV4GPK09AIEBM9NDC1/image-asset.jpeg Pen Holder Comes with loop fastener dots for affixing to surfaces. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585264312042-OBGXPUOB2KFHK6CZX6QA/Pen+Holders5368_2880p.jpg Pen Holder Single Head Version https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585262698640-CGL502XOW26JONEWFIUY/image-asset.jpeg Pen Holder Single Head Version (with magnets) https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585264353721-77IJKFD1LQAKLEZJ9ZTZ/Pen+Holders5364_2880p.jpg Pen Holder Double Headed Version https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1585262727271-FHVWIFCM151NEEIF0MFP/Pen+Holders5395_2880p.jpg Pen Holder Double Headed Version https://www.oihdesigns.com/faq daily 0.75 2024-03-21 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565975252705-WNEU4QNS34D6RPLPQXZY/_DSC4466.jpg FAQ / Shipping Info / ETC https://www.oihdesigns.com/contact-info daily 0.75 2024-03-21 https://www.oihdesigns.com/home daily 1.0 2026-03-07 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1572131594863-NNDQ925R5X3ND1W1R8XQ/20190927_GeoTripA73_215.jpg Home https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a94b74e5-fb63-4478-967f-eb623f67be62/20260222_172751_940_1DXII.jpg Home - The Minimum Viable Voltmeter The most simple voltmeter that accepts VAC and is isolated from the MCU. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/3834dcc6-258d-4660-91d3-b613f97f34fe/Screenshot+2026-01-18+114306.png Home - Isolated Differential Voltmeter Front end When you want to be alone. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6c6e451e-c4a5-4503-ad39-0fbb1c2768cf/20250623_204616_470_1DXII+copy.jpg Home - Arduino DMM Want to learn electronics? Build your own meter. My most in depth project. Lots of great features. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/dc670164-8d8c-475a-beea-a7739bef7b19/2023-05-19+10.00.47.jpg Home - The Breadhouse A little house for a breadboard to keep projects a little more organized. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/babe209a-327e-4490-89d9-e313261d4b3c/2026-01-04+09.00.26.jpg Home - Mann Voltmeter Bridge A circuit for continuous detection of floating vs closed leads when using a voltmeter. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e2025bdb-2a03-45ba-9570-83c3849b4b18/2026-01-18+18.35.58.jpg Home - Data-Logger Measure and record voltage, current, acceleration, and temperature. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725759708247-NDE7XA76GRL1XMZO2ETO/FrontAngledView.png Home - USB-C Boost/Buck Box USB-powered voltage with current monitoring and limiting in a small package. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/bcd0a240-a4e2-456d-98ec-feafaa51ab05/MainView_1.png Home - Toddler Music Box A music box for my toddlers. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1578688062122-XY3W9WAA6DM3VWC9VO8Q/MultiBoard%2BHS%2BV9two4789_2880.jpg Home A Half-Size Geology Kit https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597256370121-GKCMQ3ZIW1BTI5TXBWLD/Clipboard2333_2880p.jpg Home An Aluminum Full-Size MultiBoard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1603475526909-1VZWQRFS7LYXIJV8AN0T/Clipboards5168_2880p.jpg Home The Wind-Resistant Clipboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565972737967-FJWRJN8UYK5WBOI04XWC/Geology+Protractors Home https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1565901029107-QDI6AZ9BWULBHU9PX3MH/20190214_144919_Note9.jpg Home Founder Nick Mann testing a prototype MultiBoard on a Cornell College geology field trip to New Zealand in Feb 2019 https://www.oihdesigns.com/testpage daily 0.75 2019-09-17 https://www.oihdesigns.com/mineral-gallery-realgar daily 0.75 2019-09-18 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1568757128518-GJAHYMWZVXALP2CS27GQ/C0465-Hero1+Realgar+sRGB.jpg Mineral Gallery - Realgar https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Realgar https://www.oihdesigns.com/mineral-gallery-miscelements daily 0.75 2019-10-23 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1568817233366-JM65YRRDZ303SH49J7OM/Rhodochrosite_Hero.jpg Mineral Gallery - Others https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569300570766-P8IZSFOZM2DKRZ5FU4MP/image-asset.jpeg Mineral Gallery - Others https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569302024467-L8QTK1N2TNMMDRW9IK6B/Crocoite_SC.jpg Mineral Gallery - Others https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1571237762131-IC7H5R83AF1J2RZS5Q2N/070.jpg Mineral Gallery - Others https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1571851157251-LAIUBNI7RIHC7WXR3C26/021.jpg Mineral Gallery - Others Hero Frame https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1571851288583-REDSO4ZAQYQOR3B45VAL/H443+Fossil+Opal.gif Mineral Gallery - Others GIF https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Others https://www.oihdesigns.com/mineral-gallery-atacamite daily 0.75 2019-09-23 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569263613619-KE97Q4O9KJZGQSF6WCCM/Atacamite_SC.JPG Mineral Gallery - Atacamite https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Atacamite https://www.oihdesigns.com/corlissenginetest daily 0.75 2019-09-22 https://www.oihdesigns.com/mineral-gallery-arsenic-minerals daily 0.75 2019-09-23 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1568757128518-GJAHYMWZVXALP2CS27GQ/C0465-Hero1+Realgar+sRGB.jpg Mineral Gallery - Arsenic Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569185081239-HUZF9MQA3CYNEZH9RYTC/Arsenopyrite_SC.jpg Mineral Gallery - Arsenic Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Arsenic Minerals https://www.oihdesigns.com/the-mineral-gallery daily 0.75 2019-10-26 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569301641229-2PVRH42B2XW990W0G6DY/SC_Aurichalcite_RotationArchive4.jpg The Mineral Gallery https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1568757128518-GJAHYMWZVXALP2CS27GQ/C0465-Hero1+Realgar+sRGB.jpg The Mineral Gallery https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1568817233366-JM65YRRDZ303SH49J7OM/Rhodochrosite_Hero.jpg The Mineral Gallery https://www.oihdesigns.com/mineral-gallery-arsenopyrite daily 0.75 2019-09-23 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569185081239-HUZF9MQA3CYNEZH9RYTC/Arsenopyrite_SC.jpg Mineral Gallery - Arsenopyrite https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Arsenopyrite https://www.oihdesigns.com/mineral-gallery-copperminerals daily 0.75 2019-09-24 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569269899611-A5CZ28T8PUM68CJBS3CK/Azurite_SC.JPG Mineral Gallery - Copper Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569270063882-HTETPTXBYUT2FCHRN6AM/image-asset.jpeg Mineral Gallery - Copper Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569263613619-KE97Q4O9KJZGQSF6WCCM/Atacamite_SC.JPG Mineral Gallery - Copper Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569299811531-OE763S1NCKA0EVKEB2P0/image-asset.jpeg Mineral Gallery - Copper Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1569301641229-2PVRH42B2XW990W0G6DY/SC_Aurichalcite_RotationArchive4.jpg Mineral Gallery - Copper Minerals https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1566504925844-IMQ65TJOEBK9DHJ132LF/image-asset.jpeg Mineral Gallery - Copper Minerals https://www.oihdesigns.com/assembly-instructions daily 0.75 2020-11-25 https://www.oihdesigns.com/about-polycarbonate-versions daily 0.75 2021-05-24 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1596420633524-AOLZGML1R77QT7QW7716/Screen+Shot+2020-08-02+at+21.09.58.png About Polycarb / Aluminum Versions You can hammer on the polycarbonate and it will dent but not break. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606234339951-3ILIHI1FTFLAAF6BTFYZ/2020-11-24+10.10.24.jpg About Polycarb / Aluminum Versions Edges on Acrylic, Polycarb (middle), and Aluminum. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1606234374384-D3G2AZTJ6MEWGZSO2B94/2020-11-24+09.37.51.jpg About Polycarb / Aluminum Versions Typical Aluminum Panel. Note minor blemish in bottom corners. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597250643239-3ZTMP6OSNQ6387VJXMLT/2020-08-03+20.21.33.jpg About Polycarb / Aluminum Versions A small issue like this on the edge pf polycarbonate is unfortunate, but would not cause us to scrap the panel. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597252806010-FCO5MN3TIL7XBLPH5KJU/Clipboard3387.jpg About Polycarb / Aluminum Versions A 1/8 Acrylic Panel Stiffness Visual https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597252791293-GNT6VSE07C6O5UA0DFCN/image-asset.jpeg About Polycarb / Aluminum Versions A 1/16 Polycarb Panel Stiffness Visual: Very Flexible. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597252797969-ZQ4R83642RPQMSL9QIF6/image-asset.jpeg About Polycarb / Aluminum Versions A 1/8 Polycarb Panel Stiffness Visual: Reasonable Stiff https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597252731222-4Y9YIQCOUBIXVIH5RSWH/Clipboard3383.jpg About Polycarb / Aluminum Versions A 1/32 (~0.06” / 0.8mm) Aluminum Panel Stiffness Visual: Medium Stiffness https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1597252750789-QKPTJLQI9E76E7UBY4OX/Clipboard3384.jpg About Polycarb / Aluminum Versions A 1/16 (0.125” / ~1.6mm) Aluminum Panel Stiffness Visual: Very Stiff https://www.oihdesigns.com/make-your-own-mapboard daily 0.75 2021-05-20 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598915525587-E5OA2Z1B3JMZNZSIKZH9/Clipboard3373_2880p.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598633713149-H8UPS3VF70DUXQEJX5T2/Screen+Shot+2020-08-28+at+11.54.58.png Make Your Own Mapboard Visualization of the different sizes https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914998102-0JNPSTTGHO3S07FPV1G7/Clipboard3386.jpg Make Your Own Mapboard Stiffness of 1/8" polycarb visualization. More photos at the page about the different material trade-off page, here https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598635004383-1XKXUCFLAQXM6DEK7KGZ/Clipboard2304_2880p.jpg Make Your Own Mapboard Our clipboard with the wire spring clip we recommend. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598626683805-SXSTWE1LHEM95QWWTJEG/Screen+Shot+2020-08-28+at+09.54.27.png Make Your Own Mapboard Schematic for a clipboard wire spring clip (with 87mm between the holes). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598634294515-TY82CLZSV4WUQQ8MVD0D/Clipboard3365_2880p.jpg Make Your Own Mapboard Double Elastic Straps on the Left Side. Clip with Single Strap on Right Side (note this is a previous version before I switched to t-bars as anchors). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598630012077-X6EPNS4KSUV5VWMM8ZID/Screen+Shot+2020-08-28+at+10.48.28.png Make Your Own Mapboard Schematic for where to put the elastic corner straps. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598632219028-ENGT5AZDG6XVSA660XD1/Screen+Shot+2020-08-28+at+11.18.04.png Make Your Own Mapboard Non-Slip Button Schematic https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598634579901-DCDMMD65BF9BYJQMIH9H/Clipboard2332_2880p.jpg Make Your Own Mapboard Binder pocket bolted in on left the side. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598635722537-LGIUWNC17AESYD6XICWL/Screen+Shot+2020-08-28+at+12.13.49.png Make Your Own Mapboard Schematic for standard 3-ring binder holes on a full size mapboard. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598913788929-7YE4M3NRZS1692WQNZ76/2020-08-31+17.42.36.jpg Make Your Own Mapboard It should be about 5.5" long https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598913933835-VEESDCGKTDF284CR2VVC/2020-08-31+17.44.43.jpg Make Your Own Mapboard View of it installed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598913995672-YIL3PIPCOG5YR74THG7H/2020-08-31+17.44.57.jpg Make Your Own Mapboard Easy to flip over to get to lower accessories https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914027237-ZRKDHG9MOB68GEO832MW/2020-08-31+17.44.49.jpg Make Your Own Mapboard Outside view with it installed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914363414-INMITS0SAU9ZTR7RX6KW/2020-08-31+17.52.13.jpg Make Your Own Mapboard Binder Pocket https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914337238-4P3O3OFN8GN6FBHGZE3R/2020-08-31+17.50.44.jpg Make Your Own Mapboard Hook and loop holds things down and closed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914296193-5FBDY4ZEC95HJZYBM9OV/2020-08-31+17.50.31.jpg Make Your Own Mapboard Pencil Pouch https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914519508-LC3HVB05NBEQ3KGTX4W5/2020-08-31+17.39.35.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598914605274-VHNYG8RGK5HBN8WTYSWB/2020-08-31+17.40.44.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598909651336-7PK6S6F2TQ4I83IQ1LO4/2020-08-31+16.31.05.jpg Make Your Own Mapboard Tape version of a strap. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598909676733-NNPULV3Z6F5QVY4J0DV1/2020-08-31+16.31.23.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598909711783-CIEVADLBGOCU75KCH553/2020-08-31+16.31.33.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910339267-P0GJ3FN8P6PHIMY33SHM/2020-08-31+16.44.56.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910254954-ROS0JFWACRC0SFVFLPF1/2020-08-31+16.32.51.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910284128-KZZAYIN2RFIJ46E0BFA4/2020-08-31+16.33.04.jpg Make Your Own Mapboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910769217-Y6P80C3NHG1B5S10N35Y/2020-08-31+16.48.09.jpg Make Your Own Mapboard Installed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910810258-RXKS2N348SZ00LZMANPW/2020-08-31+16.49.01.jpg Make Your Own Mapboard Uninstalled view https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598910847169-3WZ2NWD49TYP276AMEXY/2020-08-31+16.52.01.jpg Make Your Own Mapboard Loop version for a single panel https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598912767265-Y5E29UHS40LB0J5H5T86/Screen+Shot+2020-08-31+at+17.25.49.png Make Your Own Mapboard Red dashed lines are places to be folded. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1598915411354-UJDXOVLMWG9MW97E7GE2/Clipboard3368_2880p.jpg Make Your Own Mapboard https://www.oihdesigns.com/breadhouse daily 0.75 2024-01-27 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/dc670164-8d8c-475a-beea-a7739bef7b19/2023-05-19+10.00.47.jpg Breadhouse - Make it stand out Top Front View https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ed0dbb44-b0f3-49dc-83ff-5eb0d931cd54/2023-02-18+10.30.48.jpg Breadhouse - The Problem. Not horrible as examples go, but right at the complexity limit while still being portable. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f31261cb-3857-43ae-b668-d97537cdaa29/2023-05-19+10.01.28.jpg Breadhouse - Make it stand out Showing a potentiometer that drops onto the rail with the use of Velcro. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ac4a15ff-d6aa-4241-ba43-ce39f9e8a68e/2023-05-19+10.00.58.jpg Breadhouse - Make it stand out Back View https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b0ddb66e-fac6-41db-b0be-ef4e0c72fafa/2023-05-19+10.02.03.jpg Breadhouse - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.oihdesigns.com/usbc_boostbuckbox daily 0.75 2024-09-08 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ccf11cbd-02cc-44d6-8791-0b11678b3c67/FrontAngledView_Transparent.jpg USBC_BoostBuckBox https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725759708247-NDE7XA76GRL1XMZO2ETO/FrontAngledView.png USBC_BoostBuckBox https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725759708157-LSOZP1B5ZYACIS0A8K8B/BackInsideView.png USBC_BoostBuckBox https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725759709055-2M435TMZPGQJDYS7XG4G/FrontAngledView_ShellHidden.png USBC_BoostBuckBox https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725759709139-LKUCKP4CIVT8BXZQMZ5V/TopishView.png USBC_BoostBuckBox https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725760900980-96IPJROC0CGBXG10L714/2024-09-07+10.46.18.jpg USBC_BoostBuckBox Hot-wiring a toy when fresh D-cells were not to be found. Also tested higher ("more fun") voltages. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725760915861-R4B5OOGT2YGPFJWD0WP7/2024-09-07+20.37.33.jpg USBC_BoostBuckBox Testing some thrift-store voltage regulators. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725760922526-LWKVQAU1TRV0AV5JZ0AW/2024-09-07+20.37.58.jpg USBC_BoostBuckBox Rear View. Velcro is for holding it in the backpack / on a wall (when the fan isn't needed). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1725760925932-L891Z1U7YR3ZW91L8FKG/2024-09-07+20.38.34.jpg USBC_BoostBuckBox How it fits in the backpack. https://www.oihdesigns.com/toddlermusicbox daily 0.75 2024-09-17 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/bcd0a240-a4e2-456d-98ec-feafaa51ab05/MainView_1.png Toddler's Music Box - Make it stand out CAD Render https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f3e2c519-fd6f-4c58-b580-62c7888d06f4/AngleOnView.png Toddler's Music Box - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/559e9aa1-679e-462f-a7ae-d8d86d0186a1/UnderView.png Toddler's Music Box - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/9c9d17ad-262e-43b2-90e4-506e9a587e48/2024-09-13+16.01.33.jpg Toddler's Music Box - Make it stand out Interior View. (I made a couple revisions after this photo was taken.) https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/31ecae26-0976-4bac-b233-ca2b773cddfa/2024-09-13+16.04.15.jpg Toddler's Music Box - Make it stand out Control Panel. I do not recommend this filament, but my kids don’t seem to mind. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/af48d9fa-37fa-443a-b245-9e18dbe9d29e/2024-09-13+16.04.04.jpg Toddler's Music Box - Make it stand out Closed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6f0dc2e0-712d-4ae0-adfb-e6e146d09b8a/2024-09-13+17.53.26.jpg Toddler's Music Box - Make it stand out Works for small hands. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/085caf90-7e4d-4c23-9895-f9cf072b7834/2024-09-13+17.32.32.jpg Toddler's Music Box - Make it stand out I’m not sure what was happening here. I think she wanted to help me rebuild it, as she has seen me do with things a number of times. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/0985ea6b-e010-4753-b363-974aa791d0b8/2024-09-14+14.28.54.jpg Toddler's Music Box - Make it stand out Yes, I would like music at snacktime. Also, you can see in this photo a printed potentiometer knob that’s easier for small hands to control. https://www.oihdesigns.com/arduino-multimeter-project daily 0.75 2025-07-23 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6c6e451e-c4a5-4503-ad39-0fbb1c2768cf/20250623_204616_470_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Current Version, June ‘25 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/2b0826b3-5c5f-4b76-9ee1-345381d935db/20250623_205043_760_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a2a81402-673e-4d15-935e-607ca94e4068/20250623_205912_480_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/502d8116-38c5-485c-959d-700604ac5628/2025-06-21+12.42.22.jpg Arduino Multimeter Project - Make it stand out Above and below: The most recent versions, which use a XIAO RA4M1 board. This is the same main MCU as the Arduino Uno R4. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/460c43d2-12ce-46b8-b74f-543e3c407533/2025-06-21+12.48.49.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/bc128bd3-6d44-4f76-97bc-22e15c1ba0a6/2025-06-21+12.45.58.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/7cd77e22-c03a-439b-8516-77fa69ede051/Screenshot+2025-02-08+110730.png Arduino Multimeter Project - Make it stand out Block Diagram of the Arduino DMM Functions. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6aa7e800-b329-4cea-8465-3144e9ec6e32/2024-10-07+18.09.04.jpg Arduino Multimeter Project - Make it stand out Added perk: Depending on how colorful and fun it is, it can also entertain your kids. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/246d6808-d600-421a-9918-6748fb3acaea/2024-09-29+13.40.42.jpg Arduino Multimeter Project - Make it stand out The circuitry in breadboard state. Because this section didn’t have enough photos. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/46150998-94cd-4974-b5ef-0ed846f90b2a/2025-06-08+20.57.22.jpg Arduino Multimeter Project - Make it stand out The current version, with the top panel slide off to access the buttons. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/8813ca9a-adcf-4a70-ac75-ab46400d93fc/2025-06-08+20.48.55.jpg Arduino Multimeter Project - Make it stand out (Top panel On) https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f34e0248-d593-46e4-abe0-eec8959a1b41/2025-01-25+11.05.39.jpg Arduino Multimeter Project - Make it stand out Barrel vs Banana Jack. One is a lot bigger than the other. The board mount ones are even smaller. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/539e819e-22eb-4c19-bced-4fd17fe7f83a/Screenshot+2025-02-08+131838.png Arduino Multimeter Project - Make it stand out Measuring a 1 Ohm Resistor. The high level (20mV) is the useable signal. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/8002a88f-2731-4c40-9b83-8e0eaa411513/output%283%29.png Arduino Multimeter Project - Make it stand out Constant Current Resistance Calculation as a Function of the Voltage Reading https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/d5b5a2b0-78c9-4bce-9b91-df5e88565429/Screenshot+2025-02-08+131922.png Arduino Multimeter Project - Make it stand out Measuring a 10K resistor. The low (~1.5Vdc) level is the usable signal. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/c91b1fc5-ad72-4610-9098-001fc16de67f/output%281%29.png Arduino Multimeter Project - Make it stand out Constant Voltage Resistance Calculation as a Function of the Voltage Reading. With the Zener at 4.3Vdc the value asymptotes there instead of 5.7Vdc. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/86dcb165-776d-4f15-8e9e-b39979fb7119/Screenshot+2025-06-21+194732.png Arduino Multimeter Project - Make it stand out Up-Bias Voltage Divider. V2 is the measured voltage. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/607d6f4b-1c5f-4601-9b79-eb1f93ed13ef/Screenshot+2025-06-21+194747.png Arduino Multimeter Project - Make it stand out The 50VAC out of V2 about becomes 0-5VAC at ADC2 *For reasons I have not yet dived into, there is a discrepancy between LTSpice’s simulation and the plain math on “given resistors X-Y-X, what is the voltage drop across Y?” The math is accurate, this is not. The result is I have a 2-3x margin on the functional voltage range. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b3f14037-b18a-4def-93e7-e54521789d15/Screenshot+2024-10-30+200807.png Arduino Multimeter Project - Make it stand out 4 seconds or so of reading a 1VDC source with my laptop plugged in (left), and running off battery (right). This is with the averaging enabled. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/5bdff334-f15a-4b49-b704-f1446cc6baf7/20241106_135119_260_1DXII_Black.jpg Arduino Multimeter Project - Make it stand out Prototype Version 2, where the analog rail is provided by a USB-C adapter (the black module), and the Arduino must also be plugged into a computer directly for comms. Very bad idea. Don’t do this. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f4d39e4e-a5e5-4254-985c-7ceb92933b54/2025-01-25+12.48.11.jpg Arduino Multimeter Project - Make it stand out My Current Measurement add-ons. Standalone ACS712 module on the left, and then a PCB with both an ACS712 and resistors plus op-amp on the right. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/cea71139-08b1-4583-a2fd-9e2c0b29f87f/2025-01-25+13.12.50.jpg Arduino Multimeter Project - Make it stand out Measuring 4 amps with the Hall effect sensor: Pretty close. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/63ec4ff6-ccae-4c8a-844b-3d553af4b0e8/2025-01-25+13.15.11.jpg Arduino Multimeter Project - Make it stand out Not so great at the lower range (83.6mA read as ~130mA). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/767e5cc4-a505-402a-aee3-eee8fc501a06/Screenshot+2025-01-25+191846.png Arduino Multimeter Project - Make it stand out Op-amp circuit. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/594db4d6-adec-4a03-a9e9-15b52e7893d6/2025-01-25+18.14.15.jpg Arduino Multimeter Project - Make it stand out The lowest reading I can get is about 1.5mA. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/8ea7826c-d368-40dc-96bf-63d8b44aa7e1/2025-01-25+13.42.26.jpg Arduino Multimeter Project - Make it stand out Up to 500mA. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/4774fcfb-58cb-4f92-b7fe-384b43546a8a/2025-01-25+18.14.46.jpg Arduino Multimeter Project - Make it stand out 1mA (a 1mV drop across the resistor) is too low for the op amp to pick up. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f0628d11-c422-47b7-9570-02c476cdd133/20250226_162645_570_1DXII-ADS+CROP.jpg Arduino Multimeter Project - Make it stand out The ADS1115 in the middle there. Improving the appearance of my SMD soldering is later on the to-do list. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6b31d99c-df94-43d1-be14-3db82fb63897/20250226_161023_130_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/5c1be4ec-099e-4591-b65b-1ff7d416952c/20250226_163628_180_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/65c92eb8-ba5b-4916-bd75-d3ec5c491965/DataLogging3_Both.png Arduino Multimeter Project - Make it stand out Data Logging Example: Logging an AC current (Blue) rectified with a single diode through an LED and Voltage (Red, either side of the LED) over one second, adding a capacitor across the LED leads for the second half. This is just for fun https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6b7e93cd-80d0-4dd4-ab74-a8539f40e0a5/Screenshot+2025-01-26+131357.png Arduino Multimeter Project - Make it stand out GUI Screenshot https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/57fc4daa-3327-4ccd-8662-9acccad4d01c/Screenshot+2025-06-21+202949.png Arduino Multimeter Project - Make it stand out Schematic for my V4 shield. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/29bcf451-eb94-4f15-9c43-61e54a7db654/Screenshot+2025-06-21+210323.png Arduino Multimeter Project - Make it stand out Here’s the component list. Resistors with a decimal need to be high quality (thin film, low temp coefficient). If you want email me and I’ll send the spreadsheet. Note this doesn’t include an MCU, screen, or battery. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/54ddabf7-7c2b-45b4-906d-3f848cdf2dee/20250623_203203_470_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out The current (June 2025) version https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ec487aba-5312-4c53-96d7-812624030982/Screenshot+2025-06-04+201406.png Arduino Multimeter Project - Make it stand out My PCB. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b9a72bdb-35df-433e-bb94-d61bdf9dbbbc/20250226_162028_860_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out A very beautiful photo of a now out of date one. Update pending… https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f60024f9-5731-48f8-acbb-4aba385c54bb/20250226_161108_150_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out These images are out of date… But I like how they came out so they can stay. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/15469c66-d328-418c-b693-dceb4e401214/20250226_162645_570_1DXII+copy.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/5f7e5bfd-e999-4a9c-b5d6-41ce7d5bc061/2025-05-02+19.29.46.jpg Arduino Multimeter Project - Make it stand out I keep finding smaller ways to get MOSFET minimal Rds voltage. This is a generic DC-DC boost, an Adafruit 12vdc output board, and a MAX1683 charge pump on a breakout. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a2fb9d67-9784-405f-bfdf-0087fd91ca99/2024-12-20+16.05.34.jpg Arduino Multimeter Project - Make it stand out Just for fun: The tower of past meters I’ve made in the now past 6 months with the then-current version in my hand (I changed the physical design since then). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b00c22a0-f040-4b28-8744-f061b664727e/2025-03-26+19.39.44.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ba14f7b9-5f23-4d10-a0f1-6d34a655b17e/2025-03-21+19.37.34.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/82ee9d5b-22c3-4201-bf12-144ca4aa8f5a/2025-03-26+19.39.28.jpg Arduino Multimeter Project - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/9c42756c-0cbd-479f-98a3-190a13c6294e/2025-02-25+20.03.22.jpg Arduino Multimeter Project - Make it stand out An Arduino Giga with a program that reads 8 of the analog inputs and prints the results (completely changing the screen in the process), and tells you how long it all takes (17ms). https://www.oihdesigns.com/technology daily 0.75 2025-05-12 https://images.squarespace-cdn.com/content/v1/54061d7fe4b0ee7f1c8414eb/1411155306898-CCBSOSWB1NIMTM45BEMI/detail3.jpg Technology https://www.oihdesigns.com/typography-fulton daily 0.75 2025-05-12 https://www.oihdesigns.com/buy-now-fulton daily 0.75 2025-05-12 https://images.squarespace-cdn.com/content/v1/54061d7fe4b0ee7f1c8414eb/1411417079307-T4U5J9NT7HMYC8H0TJL8/image-asset.jpeg Buy https://www.oihdesigns.com/mannvoltmeterbridge daily 0.75 2026-03-15 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/55647470-a4a3-4cbd-bb58-c51854d6c6d7/Screenshot+2026-01-09+182850.png Mann Voltmeter Bridge - Make it stand out The Results from the Mann Voltmeter Bridge. The difference between the orange and deep blue curves indicate if a circuit is open or closed. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/f39ceea7-b1a6-4b4f-b16e-34653697423e/2026-03-15+18.27.22.jpg Mann Voltmeter Bridge - Make it stand out Reading Voltage https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e3ff331d-626d-4222-b642-624cb32cbbe3/2026-03-15+18.25.45.jpg Mann Voltmeter Bridge - Make it stand out Indicating Closed https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/774dc593-4ba5-44c2-ac2c-859a98e7a94f/2026-03-15+18.33.41.jpg Mann Voltmeter Bridge - Make it stand out Indicating Floating https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e2eb631b-f643-4e81-80f7-eeb5b6b785d8/2025-07-13+20.23.23.jpg Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/add73763-5930-4cc7-a909-135bd243f989/2025-07-13+20.23.21.jpg Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/0f1cfbc7-5bfc-4265-9cb3-b077be037e00/2025-07-13+20.23.12.jpg Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/bd0a6d33-7241-4da4-8d95-3298da50e860/Screenshot+2025-07-14+160857.png Mann Voltmeter Bridge - Make it stand out Measuring Voltage https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/0b7460e3-a1ab-4b5e-bb86-c4d3d2d08441/Screenshot+2025-07-14+161037.png Mann Voltmeter Bridge - Make it stand out Shorted Probes https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/dec4f7f9-12eb-4e1e-bea7-3ed74a0b8f2f/Screenshot+2025-07-16+161445.png Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/d0287ce3-5d2c-4a88-bba2-4aca8b69a96f/Screenshot+2026-01-04+085347.png Mann Voltmeter Bridge - Make it stand out The Voltmeter Front End https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/1ffb35b5-119b-4737-9470-9e1defcaaf76/Screenshot+2026-01-04+090126.png Mann Voltmeter Bridge - Make it stand out The Isolated ADC (ADS1115) and Signal (ADuM1200) Interface https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/babe209a-327e-4490-89d9-e313261d4b3c/2026-01-04+09.00.26.jpg Mann Voltmeter Bridge - Make it stand out Circuit I’m using. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6aea8867-e5d8-4749-9fc8-143433e3777f/SDS804X_HD_PNG_4.png Mann Voltmeter Bridge - Make it stand out Screenshot of a scope. Note this is with the 10X on the probe. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/40d49eca-b068-4481-8636-bd8266099ce1/SDS804X_HD_PNG_8.png Mann Voltmeter Bridge - Make it stand out Here is a detail at 10X https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ad93f1f0-6d24-4c14-b8a8-c9f23d5c458f/SDS804X_HD_PNG_7.png Mann Voltmeter Bridge - Make it stand out This is with the probe on 1X https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e4167f30-e5b4-4695-b71b-c24355c6794a/2026-01-10+04.55.06.jpg Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/55647470-a4a3-4cbd-bb58-c51854d6c6d7/Screenshot+2026-01-09+182850.png Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e31af864-3b77-46a2-9538-3e24389513fd/2026-02-01+14.01.22.jpg Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/6d3edf34-5c71-4e16-aad9-6cee08ab6a72/Screenshot+2026-01-10+091000.png Mann Voltmeter Bridge - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.oihdesigns.com/voltmeter-front-end-pcb daily 0.75 2026-01-18 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/3834dcc6-258d-4660-91d3-b613f97f34fe/Screenshot+2026-01-18+114306.png Voltmeter Front End PCB - Make it stand out PCB View https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a36b5f38-3171-4126-8644-e84a832d74c3/Screenshot+2026-01-18+060701.png Voltmeter Front End PCB - Make it stand out Schematic View https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b43a33b6-a307-4f88-9384-e7d9fd81f362/2026-01-18+05.50.53.jpg Voltmeter Front End PCB - Make it stand out One of the assembled boards. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/21acd53a-53d4-43ee-9d34-19d469590680/2026-01-18+05.51.36.jpg Voltmeter Front End PCB - Make it stand out This PCB is modded for current measurement and a different i2c address and stacked on an non-modded board (with 0 Ohm jumpers for R17 and 18). This allows simultaneous isolated current and voltage measurements (so the current can be high side, low side, or a completely separate from the voltage). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/45a6c4b9-6ead-4230-94ec-cbb7fb617626/2026-01-18+14.50.15.jpg Voltmeter Front End PCB - Make it stand out Isolated ADC board, top, and voltage conditioning + open lead detect, bottom. https://www.oihdesigns.com/datalogger daily 0.75 2026-03-08 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/49e264ff-4e5b-480e-b044-6df9edabd4db/2026-01-17+20.54.04.jpg "AdaLogger"-Based Data Logger - Make it stand out The datalogger https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/58983f5b-cac3-4cd2-b121-4582c722e55f/2026-03-01+06.27.53.jpg "AdaLogger"-Based Data Logger - Make it stand out Android GUI Interface https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/ccad8229-afee-438a-89c9-b1bbb4bf25f9/2026-01-17+20.54.24.jpg "AdaLogger"-Based Data Logger - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a74f58c2-225e-4578-8b19-5b499342b30c/2026-01-18+18.34.18.jpg "AdaLogger"-Based Data Logger - Make it stand out Preparing for functional testing on the “Home EV” https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/e2025bdb-2a03-45ba-9570-83c3849b4b18/2026-01-18+18.35.58.jpg "AdaLogger"-Based Data Logger - Make it stand out Fortunately, it survived the rollover event. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/9e61ab92-957f-4580-a8af-6960964598c7/Screenshot+2026-01-31+153201.png "AdaLogger"-Based Data Logger - Make it stand out 1Hz (first two segments), 10Hz, 100Hz, 1kHz, and 10kHz logging https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/fb93a2fd-f8fc-442b-b24f-3b9fefaaa2c7/Screenshot+2026-01-31+153223.png "AdaLogger"-Based Data Logger - Make it stand out Detail of the 100Hz. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a0db5b42-ef15-498f-9879-8492ea3bbfe2/Screenshot+2026-01-31+154008.png "AdaLogger"-Based Data Logger - Make it stand out Detail of the 1kHz. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/85345b89-a475-4d0f-b99a-0d264634d3cb/Screenshot+2026-01-31+155031.png "AdaLogger"-Based Data Logger - Make it stand out The big spike near second 73 is hitting a wall head on. You can also see at the end that Y and Z transpose, which is where I rolled it (the roll then caused a reset on the board, which is why the data ends there). https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/58983f5b-cac3-4cd2-b121-4582c722e55f/2026-03-01+06.27.53.jpg "AdaLogger"-Based Data Logger - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/52a224fd-c822-44c0-bcad-7ff16c9a0d4c/2026-03-01+06.28.01.jpg "AdaLogger"-Based Data Logger - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a972a90d-8c46-45f1-bb96-b7cc366c30e9/2026-03-01+06.28.04.jpg "AdaLogger"-Based Data Logger - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.oihdesigns.com/the-minimum-viable-voltmeter daily 0.75 2026-03-07 https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a94b74e5-fb63-4478-967f-eb623f67be62/20260222_172751_940_1DXII.jpg The Minimum Viable Voltmeter - Make it stand out The Voltmeter Circuitry on a Breadboard https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/99c6c4a9-590c-48ea-9f52-a06b12052196/2026-03-06+20.04.52.jpg The Minimum Viable Voltmeter - Make it stand out Custom PCB version. Same circuitry as the breadboard version, but easier to assemble. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/eb665ffd-13cb-4253-a52f-38239cf3099e/20260222_174929_490_1DXII.jpg The Minimum Viable Voltmeter - Make it stand out Interfacing with a Custom-Built Android App https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/814335a4-450e-41f5-be4a-17004453c379/20260222_172916_200_1DXII.jpg The Minimum Viable Voltmeter - Make it stand out Alternate View https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/fa3b79ca-6bf1-4bbc-b496-dfe73eb7a1d4/Screenshot+2026-02-25+193737.png The Minimum Viable Voltmeter - Make it stand out Functional diagram of the TI AMC0330R, from the PDF below https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/d8153b3b-dc9f-4cbb-aa08-35e9182e0524/Screenshot+2026-02-21+172027.png The Minimum Viable Voltmeter - Make it stand out The circuit. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/4d2c9cec-8b78-4374-b76c-fcffcc34d3b0/Screenshot+2026-03-07+054001.png The Minimum Viable Voltmeter - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/843d57d7-bce9-443c-9b70-2b671a81263b/2026-03-07+05.38.14.jpg The Minimum Viable Voltmeter - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/864c28a6-f21a-4b1e-95b2-1e84715ca7e8/2026-02-21+17.08.45.jpg The Minimum Viable Voltmeter - Make it stand out Measuring a VAC https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/29bc7549-de66-4514-85b9-d849a5a25a49/Screenshot+2026-02-21+171002.png The Minimum Viable Voltmeter - Make it stand out Computer GUI, showing the VAC reading https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/a628a400-9b4c-4306-b42b-d12aeb06103f/Screenshot+2026-02-21+171034.png The Minimum Viable Voltmeter - Make it stand out Minimalist GUI version https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/b974d814-8a3c-4a20-bb0a-870dcac8537b/20260222_175615_420_1DXII.jpg The Minimum Viable Voltmeter - Make it stand out A view of the meter with the computer GUI. https://images.squarespace-cdn.com/content/v1/5d5592753cb720000178c647/aafc2cdc-6feb-48f2-8135-f40e2150200b/2026-02-21+09.56.00.jpg The Minimum Viable Voltmeter - Make it stand out Android App Version of the GUI