Adafruit Feather 32u4 Adalogger
Feather-format ATmega32u4 board (8 MHz, 3.3V) with an onboard microSD card holder, native USB, 100mA LiPo charger, 20 GPIO pins, and hardware I2C/SPI/UART. MicroSD and battery not included.
Feather-format ATmega32u4 board (8 MHz, 3.3V) with an onboard microSD card holder, native USB, 100mA LiPo charger, 20 GPIO pins, and hardware I2C/SPI/UART. MicroSD and battery not included.
2 grouped connections are listed in the table but omitted from the graphic until individual pins are available.
| Pin | Type | Voltage |
|---|---|---|
| GND | Ground | 0V |
| BAT | Power | battery voltage |
| USB | USB | USB 5V |
| EN | Control | active low |
| 3V | Power | 3.3V, 500mA peak |
| #0 RX#1 TX | UART | 3.3V logic |
| #2 SDA#3 SCL | I2C | 3.3V logic |
| #5#6#9#10#11#12#13 | GPIO | 3.3V logic |
| A0-A5 | Analog | 3.3V max |
| SCKMOSIMISO | SPI | 3.3V logic |
| #4#7#8 | USB | 3.3V logic |
| RSTARef | Analog, Control | up to 3.3V |
2 grouped connections are omitted from the graphic until individual pins are available.
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: USB, GND, #5/#6/#9/#10/#11/#12/#13, SCK/MOSI/MISO. 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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