Adafruit Feather 32u4 Adalogger

Adafruit Feather 32u4 Adalogger is an all-in-one data logger with a MicroSD holder. The data logger features an ATmega32u4 clocked at 8MHz and at 3.3V logic. The processor offers 32K of flash and 2K of RAM. The built-in USB provides a USB-to-Serial program and debug capability. To support portable projects, the board includes a connector for Adafruit 3.7V lithium polymer batteries and built-in battery charging.


  • Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
  • Weight 5.1 grams
  • ATmega32u4 @ 8MHz with 3.3V logic/power
  • 3.3V regulator with 500mA peak current output
  • USB native support comes with a USB bootloader and serial port debugging
  • 20 GPIO pins
  • Hardware Serial, hardware I²C, hardware SPI support
  • 8 PWM pins
  • 10 analog inputs
  • Built-in 100mA lipoly charger with charging status indicator LED
  • Pin #13 red LED
  • Power/enable pin
  • 4 mounting holes
  • Reset button

FEATHER 32u4 Adalogger

Adafruit Feather 32u4 Adalogger
Published: 2016-12-15 | Updated: 2022-03-11