Adafruit Feather 32u4 Adalogger

Name: Adafruit Feather 32u4 Adalogger
Brand: Adafruit
SKU: 2795

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.

Logical pinout · physical placement not verified

6 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.

GND
Type · GroundVoltage · 0V
BAT
Type · PowerVoltage · battery voltage
USB
Type · USBVoltage · USB 5V
EN
Type · ControlVoltage · active low
3V
Type · PowerVoltage · 3.3V, 500mA peak
#0 RX#1 TX
Type · UARTVoltage · 3.3V logic
#2 SDA#3 SCL
Type · I2CVoltage · 3.3V logic
#5#6#9#10#11#12#13
Type · GPIOVoltage · 3.3V logic
A0-A5
Type · AnalogVoltage · 3.3V max
SCKMOSIMISO
Type · SPIVoltage · 3.3V logic
#4#7#8
Type · USBVoltage · 3.3V logic
RSTARef
Type · Analog, ControlVoltage · up to 3.3V

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

Logical pinout · physical placement not verified

6 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.

Pin details

12 connections

GND
GroundVoltage · 0V
BAT
PowerVoltage · battery voltage
USB
USBVoltage · USB 5V
EN
ControlVoltage · active low
3V
PowerVoltage · 3.3V, 500mA peak
#0 RX#1 TX
UARTVoltage · 3.3V logic
#2 SDA#3 SCL
I2CVoltage · 3.3V logic
#5#6#9#10#11#12#13
GPIOVoltage · 3.3V logic
A0-A5
AnalogVoltage · 3.3V max
SCKMOSIMISO
SPIVoltage · 3.3V logic
#4#7#8
USBVoltage · 3.3V logic
RSTARef
Analog, ControlVoltage · up to 3.3V

Start wiring

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.

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Pinout