DMM Feather Specific
About the DMM Feather Specific PCB
DMM Feather Specific is an open source PCB design by oihdesigns, published on GitHub. It is a 4-layer board measuring 68.5 × 53.3 mm, with 57 components from 43 distinct parts.
Other key parts include the AD8237ARMZ, TMUX1108PWR, TCA9536DGKR, OPA333AIDBVR and LM317_TO-220. By type, the board carries 20 resistors, 11 ICs, 8 capacitors, 6 connectors, 3 transistors and 3 switches.
It belongs with the dev boards & breakouts and test & measurement designs in this gallery.
From the project
A small, open hardware DMM
This is the PCB design and code for a 4.5 digit DMM/ instrumentation module. It is designed and written primairly for Arduino-style development boards.
I've developed this DMM in my work testing and troubleshooting electronics to make my life easier.
I've had Deep-Wiki index my documentation. It did a mostly okay job. You can read its summary here: [](https://deepwiki.com/oihdesigns/Micro-DMM)
Main components on the DMM Feather Specific
DMM Feather Specific bill of materials (BOM)
57 components, 43 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AD8237ARMZ RFM-0505S | Converter_DCDC_TRACO_TEA1-xxxx_THT | U1 |
| 1 | TMUX1108PWR ADuM1200AR | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | TCA9536DGKR ADuM1200AR | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | OPA333AIDBVR ISO1540 | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | LM317_TO-220 | SOT-223-3_TabPin2 | U5 |
| 1 | LM4040DBZ-5 | SOT-23 | U6 |
| 2 | IX4426N | SOIC-8_3.9x4.9mm_P1.27mm | U7, U9 |
| 1 | MAX1683 | SOT-23-5_HandSoldering | U8 |
| 1 | LM4040DBZ-2.5 | SOT-23 | U10 |
| 1 | ADS1115IDGS | TSSOP-10_3x3mm_P0.5mm | U11 |
| 1 | Adafruit_Feather_Generic | Adafruit_Feather | A1 |
| 1 | MMBT3904 | SOT-23 | Q1 |
| 2 | AO3400A MOSFET | SOT-23 | Q2, Q3 |
| 1 | Out to Screen | PinSocket_1x04_P2.54mm_Vertical | J4 |
| 2 | Barrel_Jack | BarrelJack_Horizontal | J7, J9 |
| 1 | Conn_01x01_Socket | PinSocket_1x01_P2.54mm_Vertical | J8 |
| 1 | I_Input | PinSocket_1x03_P2.54mm_Vertical | J10 |
| 1 | Conn_01x02_Pin | PinSocket_1x02_P2.54mm_Vertical | J11 |
| 1 | 06TR4FA103DPR | Potentiometer_ACP_CA6-VSMD_Vertical | RV1 |
| 1 | R_Potentiometer_US | Potentiometer_ACP_CA6-VSMD_Vertical | RV2 |
Show 23 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | SW_Push | SW_SPST_CK_RS282G05A3 | SW1, SW2, SW3 |
| 1 | LED | LED_Luminus_MP-3030-1100_3.0x3.0mm | D1 |
| 2 | D_Schottky | D_SOD-123 | D2, D3 |
| 4 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C7, C8 |
| 2 | 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4 |
| 1 | 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 2.2uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 500 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 62.0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 3 | 0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R9, R11 |
| 1 | 22.0K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 100K 4.7K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 100R 330.0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 1M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 22K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | 100K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 1 | 200R 15K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 2 | 499.0K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R16 |
| 1 | 4.7K 0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17 |
| 2 | 4.7K 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18, R19 |
| 1 | 10k x4 | RESCAXS127P508X320X70-8N | RN1 |
| 1 | 1K x4 | RESCAXS127P508X320X70-8N | RN2 |
DMM Feather Specific design files
The KiCad project lives in the oihdesigns/Micro-DMM repository on GitHub; these links point at the commit this page was built from.
DMM Feather Specific: common questions
How big is the DMM Feather Specific PCB?
The DMM Feather Specific measures 68.5 × 53.3 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the DMM Feather Specific?
57 components, from 43 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the DMM Feather Specific design files?
From the oihdesigns/Micro-DMM repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the DMM Feather Specific design in my own project?
The repository has no license, so all rights stay with oihdesigns. Use it as a reference, and ask the author before reusing the design.
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