Milliohm meter
About the Milliohm meter PCB
Milliohm meter is an open source PCB design by gabeak2, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 59.7 × 54.6 mm, with 32 components from 19 distinct parts.
Other key parts include the CJ431, OPA388 and INA333XXDGK. By type, the board carries 14 resistors, 6 connectors, 3 ICs, 3 capacitors, 2 transistors and 2 diodes.
From the project
A milliohm meter PCBA reading 10V/Ohm.
Main components on the Milliohm meter
Milliohm meter bill of materials (BOM)
32 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CJ431 | SOT-23 | U1 |
| 1 | OPA388 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | INA333XXDGK INA333xxDGK | VSSOP-8_3.0x3.0mm_P0.65mm | U3 |
| 2 | AO3400A | SOT-23 | Q1, Q2 |
| 4 | CONN_01X01 Conn_01x01 | CT3149 | J1, J2, J5, J6 |
| 2 | CONN_01X02 Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J3, J4 |
| 1 | BH123A | BH123A | BAT1 |
| 1 | JS102011SAQN | SW_SPDT_CK_JS102011SAQN | SW1 |
| 1 | C191023 D_Schottky | D_SOD-323 | D1 |
| 1 | C84256 LED_RED | LED_0805_2012Metric | D2 |
| 2 | 100NF 100nF | C_0402_1005Metric | C1, C2 |
| 1 | DNS | C_0402_1005Metric | C3 |
| 2 | 100 | C_0402_1005Metric | R1, R2 |
| 2 | 0 | R_0402_1005Metric | R3, R8 |
| 1 | 100 100.0 | C_0402_1005Metric | R4 |
| 5 | 47K 47k | C_0402_1005Metric | R5, R6, R11, R12, R15 |
| 1 | 220 | C_0402_1005Metric | R7 |
| 2 | 10 | C_0402_1005Metric | R9, R10 |
| 1 | 1k | C_0402_1005Metric | R13 |
Milliohm meter design files
The KiCad project lives in the gabeak2/milliohm_meter repository on GitHub; these links point at the commit this page was built from.
Milliohm meter: common questions
How big is the Milliohm meter PCB?
The Milliohm meter measures 59.7 × 54.6 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Milliohm meter?
32 components, from 19 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 Milliohm meter design files?
From the gabeak2/milliohm_meter 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 Milliohm meter design in my own project?
Yes, under the terms of its GPL-3.0 license, which gabeak2 chose for the repository.