Adafruit Feather 328P - Atmega328P 3.3V @ 8 MHz
Adafruit Feather board with ATmega328P running at 3.3 V and 8 MHz in the standard Feather form factor.
Adafruit Feather board with ATmega328P running at 3.3 V and 8 MHz in the standard Feather form factor.
Common ground for all power and logic.
Positive voltage to/from JST jack for optional LiPoly battery.
Positive voltage to/from micro USB jack if connected.
3.3V regulator enable; connect to ground to disable regulator.
3.3V regulator output.
Reset pin; tie to ground to reset AVR/launch bootloader.
Analog reference pin.
I2C data pin.
I2C clock pin.
Hardware serial receive pin.
Hardware serial transmit pin.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | Power pins | ground | Common ground for all power and logic. | |
| BAT | Power pins | power | Positive voltage to/from JST jack for optional LiPoly battery. | |
| USB | Power pins | power | Positive voltage to/from micro USB jack if connected. | |
| EN | Power pins | power | 3.3V regulator enable; connect to ground to disable regulator. | |
| 3V | Power pins | power | 3.3V regulator output. | |
| RST | Control pins | digital io | Reset pin; tie to ground to reset AVR/launch bootloader. | |
| ARef | Analog pins | analog | Analog reference pin. | |
| SDA | I2C pins | i2c | I2C data pin. | |
| SCL | I2C pins | i2c | I2C clock pin. | |
| RX | UART pins | uart | Hardware serial receive pin. | |
| TX | UART pins | uart | Hardware serial transmit pin. |
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: BAT, USB, EN, 3V, GND, ARef, SDA, SCL. 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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