
Compact 5 V, 16 MHz ATmega328P board with 18 exposed GPIO, native low-speed USB bootloading and an FTDI-compatible serial header.

| Pin | Position | Type |
|---|---|---|
| D10 | D10 | GPIO |
| MOSI | MOSI | SPI |
| MISO | MISO | SPI |
| SCK | SCK | SPI |
| A0 | A0 | Analog |
| A1 | A1 | Analog |
| A2 | A2 | Analog |
| A3 | A3 | Analog |
| SDA | SDA | I2C |
| SCL | SCL | I2C |
| A6 | A6 | Analog |
| A7 | A7 | Analog |
| D0 | D0 | GPIO |
| D1 | D1 | GPIO |
| D3 | D3 | GPIO |
| D4 | D4 | GPIO |
| D5 | D5 | GPIO |
| D6 | D6 | GPIO |
| D8 | D8 | GPIO |
| D9 | D9 | GPIO |
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: D10, MOSI, MISO, SCK, A0, A1, A2, A3. Schematik maps them to your board in the app.
Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.
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