A very small dev-board for the original ESP32 (XTENSA Dual-Core) with USB-C PD support.
Since the ESP32-C3 was released I enjoyed the use of those ultra-small dev-boards. Sadly there were no such dev-boards for the "original" ESP32 (XTENSA Dual-Core), so I created my own.
The board measures just 25x31mm — only slightly bigger than the ESP32-WROOM module itself (19x26mm).
- USB-C connector
- USB-PD support via CH224Q PD controller
- Switchable V+ output — USB-PD voltage can be enabled/disabled via GPIO18
- All usable GPIOs broken out on 2.54mm headers
- 2x I2C, 2x UART, Touch, DAC, ADC
- Onboard LED on GPIO02, Boot button on GPIO00
The V2.2 PD revision includes a CH224Q USB-PD sink controller.
- Default output: 9V — the CH224Q negotiates 9V on power-up
- The voltage can be changed to 5V via software using the CH224Q Arduino Library
- V+ is switched — GPIO18 controls a MOSFET that connects/disconnects the negotiated PD voltage to the V+ output pin. This allows you to turn the power output on and off programmatically
- I2C connection — the CH224Q is connected to I2C1 on GPIO21 (SDA) and GPIO22 (SCL)
Gerber and provided .xlsx files can be used to directly upload to JLCPCB (*.xlsx files for assembly service).
| File | Description |
|---|---|
MiniESP32_Gerber.zip |
Gerber files (panelized, ready for JLCPCB) |
MiniESP32_V2.2 PD-Schematic.PDF |
Schematic |
BOM-MiniESP32(V2.2 PD).pdf |
Bill of Materials |
MiniESP32_V2.2 PD_Assembly.PDF |
Assembly drawing |
MiniESP32_V2.2 PD_BoardSpec.PDF |
Board specifications |
JLC_PCBA_BOM-MiniESP32(V2.2 PD).xlsx |
BOM for JLCPCB assembly |
JLC_PCBA_CPL-MiniESP32(V2.2 PD).xlsx |
Component placement for JLCPCB assembly |
MiniESP32.step |
3D model (STEP) |
Note: the patched diode is now fixed and uploaded!
Licensed under the Open Source Hardware Association License