Adalogger FeatherWing - RTC + SD Add-on For All Feather Boards

A Feather board without ambition is a Feather board without FeatherWings! This is the Adalogger FeatherWing: it adds both a battery-backed Real Time Clock and micro SD card storage to any Feather main board.

3.3VFeather bottom row, second from left
Feather 3.3V rail used to power the SD card and RTC when main power is available, per Adafruit Learn pinouts.
Type · powerVoltage · 3.3V
GNDFeather bottom row, fourth from left
Ground return for the SD card and RTC, per Adafruit Learn pinouts.
Type · groundVoltage · 0V
SCLTop right, left of SDA
I2C clock for the PCF8523 RTC; Adafruit states this pin has a 10K pull-up resistor to 3.3V.
Type · signalVoltage · 3.3V pull-up
SDATop right, rightmost
I2C data for the PCF8523 RTC; Adafruit states this pin has a 10K pull-up resistor to 3.3V.
Type · signalVoltage · 3.3V pull-up

Start wiring

I2C · SPI · 3.3V · 0V

Confirm the data interface matches your host board.

Module pins: 3.3V, GND, SCL, SDA, INT, SCK, MOSI, MISO. Schematik maps them to your board in the app.

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