PowerCutoffBoard1
ararobo·GN10RemoteEmergencyStop·hardware/PowerCutoffBoard1/PowerCutoffBoard1.kicad_pcb
About the PowerCutoffBoard1 PCB
PowerCutoffBoard1 is an open source STM32 PCB design by ararobo, published on GitHub. It is a 2-layer board measuring 50 × 45 mm, with 42 components from 19 distinct parts.
Its main chip is the STM32F303K8Tx, from the STM32 family. Other key parts include the Wio-E5, 3.3V, MIC4427 and MCP2562-E-SN. By type, the board carries 12 capacitors, 9 resistors, 8 diodes, 5 ICs, 5 connectors and 3 switches.
From the project
PowerCutoffBoard and RemoteSwitchBoard created by Gento Aiba.
This repository contains hardware and firmware for an emergency stop system: - PowerCutoffBoard: A circuit board that cuts off power in emergency situations. - RemoteSwitchBoard: A circuit board that remotely controls switches.

Main components on the PowerCutoffBoard1
PowerCutoffBoard1 bill of materials (BOM)
42 components, 19 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F303K8Tx | LQFP-32_7x7mm_P0.8mm | U1 |
| 1 | Wio-E5 | LoRa-E5 | U2 |
| 1 | 3.3V | SOT-223-3_TabPin2 | U3 |
| 1 | MIC4427 | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | MCP2562-E-SN | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | Conn_Coaxial | SMA_Molex_73251-2120_EdgeMount_Horizontal | J1 |
| 1 | Conn_01x03 | AMASS_MR30PW-FB_1x03_P3.50mm_Horizontal | J2 |
| 1 | Conn_01x04 | JST_XH_S4B-XH-A_1x04_P2.50mm_Horizontal | J3 |
| 2 | Conn_01x04 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J5, J6 |
| 2 | SW_Push | TVAF | SW1, SW2 |
| 1 | SW_DIP_x04 | SW_DIP_SPSTx04_Slide_Copal_CHS-04B_W7.62mm_P1.27mm | SW3 |
| 1 | D | Nexperia_CFP3_SOD-123W | D1 |
| 7 | LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D4, D5, D6, D7, D8, D9 |
| 7 | 0.1u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C4, C6, C9, C11, C13 |
| 3 | 4.7u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C5, C10 |
| 2 | 10u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C8 |
| 1 | 10k | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | R1 |
| 7 | 1k | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | R2, R4, R5, R6, R7, R8, R9 |
| 1 | 120 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
PowerCutoffBoard1 design files
The KiCad project lives in the ararobo/GN10RemoteEmergencyStop repository on GitHub; these links point at the commit this page was built from.
PowerCutoffBoard1: common questions
What microcontroller does the PowerCutoffBoard1 use?
The PowerCutoffBoard1 is built around the STM32F303K8Tx, from the STM32 family.
How big is the PowerCutoffBoard1 PCB?
The PowerCutoffBoard1 measures 50 × 45 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PowerCutoffBoard1?
42 components, from 19 distinct parts. The full bill of materials is listed on this page.
Where can I download the PowerCutoffBoard1 design files?
From the ararobo/GN10RemoteEmergencyStop repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PowerCutoffBoard1 design in my own project?
The repository has no license, so all rights stay with ararobo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the PowerCutoffBoard1 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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