Arm Board v3
About the Arm Board v3
Arm Board v3 is an open source ESP32 PCB design by ICRS, published on GitHub. It is a 2-layer board measuring 80 × 80 mm, with 23 components from 11 distinct parts.
Its main chip is the Z_ESP32_DevKitC_38pin_socket, from the ESP32 family. Other key parts include the MC74ACT125DG and ADS1115IDGS. By type, the board carries 10 connectors, 6 resistors, 5 ICs, 1 diode and 1 capacitor.
Main components on the Arm Board v3
Arm Board v3 bill of materials (BOM)
23 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | MC74ACT125DG | SOIC127P600X175-14N | IC1, IC2, IC3 |
| 1 | ~ | Z_ESP32_DevKitC_38pin_socket | U2 |
| 1 | ADS1115IDGS | TSSOP-10_3x3mm_P0.5mm | U3 |
| 1 | Conn_01x02 | AMASS_XT30PW-M_1x02_P2.50mm_Horizontal | J1 |
| 4 | Conn_01x03 | Molex_Micro-Fit_3.0_43045-0400_2x02_P3.00mm_Horizontal | J4, J12, J14, J15 |
| 5 | Conn_01x04 | Molex_Micro-Fit_3.0_43045-0400_2x02_P3.00mm_Horizontal | J5, J6, J8, J9, J20 |
| 1 | LED | LED_0805_2012Metric | D3 |
| 1 | 1u | C_0805_2012Metric | C1 |
| 4 | 10k | R_0805_2012Metric | R4, R7, R10, R11 |
| 1 | 1k | R_0805_2012Metric | R5 |
| 1 | 0R | R_0805_2012Metric | R50 |
Arm Board v3 design files
The KiCad project lives in the ICRS/IPRL-Electronics-Hardware repository on GitHub; these links point at the commit this page was built from.
Arm Board v3: common questions
What microcontroller does the Arm Board v3 use?
The Arm Board v3 is built around the Z_ESP32_DevKitC_38pin_socket, from the ESP32 family.
How big is the Arm Board v3?
The Arm Board v3 measures 80 × 80 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Arm Board v3?
23 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Arm Board v3 design files?
From the ICRS/IPRL-Electronics-Hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Arm Board v3 design in my own project?
The repository has no license, so all rights stay with ICRS. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Arm Board v3 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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