2 layers19 × 76 mm
Sub
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
15 parts3kApache-2.0
2 layers67 × 52.5 mm
Power control.kicad proj
AngryUEFI/AngryESP2Control an ATX mainboard via an ESP32 and custom PCB
- Size
- 67 × 52.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 36
- Pads
- 81
- Tracks, vias
- 118, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 Jul 2025
- Updated
- 16 Dec 2025
Overview
Power control.kicad proj is an open-source printed circuit board by AngryUEFI, from the AngryUEFI/AngryESP repository on GitHub, published under the BSD-2-Clause licence. It is a 2-layer board of 67 × 52.5 mm with 15 parts on 36 nets, routed with 118 tracks and 0 vias.
Its parts include 5 connectors, 3 resistors, 3 transistors, 2 diodes and 2 switches. It belongs with the computers and single-board computers boards and the ESP32 boards of this library.
README
README.mdAngryESP
Control the power and reset PINs of an ATX mainboard via an ESP32.
PCB
- prefer not to solder the ESP directly to the board, use sockets
- not all pins on the ESP socket need to be populated, only 2+4 are required
- if the pinout of your ESP does not match, connect the correct pins via jumper cables
- the buttons and the HDD LED are not required
- the power LED is required to drop the 5V of the LED pin to a safe value for the ESP (3.3V)
- connect the 5V and GND header to a USB header on the mainboard
- enable USB charging or Wake up by USB on the UEFI to power the USB ports when the system is off
- the 5V and GND pin rows are for connecting additional things, e.g. fans
- system header pins have an in and an out to allow connecting to the chassis as well
- reset and power button headers have one 3.3V pin, one GND pin, measure the pins to figure out which one is which if your mainboard does not document this
Verify voltage levels of the buttons before connecting the ESP The ESP only tolerates 3.3V. Your mainboard might use 5V on the buttons, this might damage the ESP.
Pin mappings for reference:
- GPIO18 - Reset
- GPIO21 - Short Power
- GPIO19 - Long Power
- GPIO5 - Power LED
Long power (6s press) and short power (0.2s press) use two different pins for easier setup in ESPHome. The two pins are shorted on the PCB and go to the power button header.
ESPHome config
There are two options:
- Home Assistant integrated
- Standalone
Home Assistant integrated
- adds the ESP to HA via the ESPHome integration
- buttons and LED are HA entities
- requires working HA
- control via API of HA
Use ESPHome/ha.yaml in the ESPHome Builder in HA. Create a new device and copy the contents of the ha.yaml into the file below the auto generated parts of the ESPHome config.
Standalone
- uses a simple HTTP API on the ESP directly
- control via API of the ESP
- only requires wifi AP with DHCP
TODO
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3 |
| 2 | 330R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | Aux PWR | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J3 |
| 1 | ESP32_1 | Connector_PinSocket_2.54mm:PinSocket_1x15_P2.54mm_Vertical | J7 |
| 1 | ESP32_2 | Connector_PinSocket_2.54mm:PinSocket_1x15_P2.54mm_Vertical | J8 |
| 1 | HDD | LED_THT:LED_D3.0mm | D2 |
| 1 | PWR | LED_THT:LED_D3.0mm | D1 |
| 1 | PWR | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | RST | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | System In | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J1 |
| 1 | System Out | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J2 |
Questions
How big is the Power control.kicad proj PCB?
It measures 67 × 52.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power control.kicad proj use?
15 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Power control.kicad proj KiCad files?
From the AngryUEFI/AngryESP repository on GitHub, at the commit this page was made from: the board is PCB/power_control.kicad_proj/power_control.kicad_proj.kicad_pcb and its schematic PCB/power_control.kicad_proj/power_control.kicad_proj.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power control.kicad proj design in my own project?
Its repository publishes it under the BSD-2-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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