Adafruit Adalogger FeatherWing - RTC & SD Add-on
The Adalogger FeatherWing is a data-logging add-on board for Adafruit Feather development boards, adding a battery-backed real-time clock (RTC) and microSD card storage via I2C and SPI interfaces for Arduino and CircuitPython projects.
Features
- Adds battery-backed RTC (PCF8523) and microSD storage to any Feather board.
- Enables precise time-stamped data logging for IoT sensor nodes and portable devices.
- Simple plug-and-play connection via Feather stacking headers or female headers.
- Includes comprehensive tutorial with wiring diagrams and code for Arduino/CircuitPython.
- Compact form factor designed to match the Feather board footprint.
Out of stock
The Adalogger FeatherWing is a dedicated expansion board designed to augment the capabilities of Adafruit’s Feather ecosystem. It integrates a PCF8523 I2C real-time clock with a 32kHz crystal and a dedicated CR1220 coin cell backup slot, ensuring persistent timekeeping even during main power cycles. Simultaneously, it provides a full-size microSD card socket connected to the host Feather’s SPI bus, creating a complete local data storage solution.
This board is engineered for system integrators and makers building data-logging applications, such as environmental monitors, GPS trackers, or portable sensor nodes. The FeatherWing mechanically and electrically mates directly with any Feather mainboard via stacking headers, preserving all other GPIO and features. The included tutorials provide ready-to-use firmware examples for setting the RTC and writing sensor data to the SD card, significantly reducing development time for embedded logging projects.
Additional Information
| Weight | 0.0051 kg |
|---|---|
| Dimensions | 5.08 × 2.29 cm |













