Pre-Assembled Adafruit PiCowbell Adalogger for Pico MicroSD & RTC Expansion: Easy Data Logging for Raspberry Pi Pico Projects
The Pre-Assembled Adafruit PiCowbell Adalogger for Pico is a versatile expansion board designed to supercharge your Raspberry Pi Pico or Pico W projects with data logging and real-time clock functionality. With pre-soldered 20-pin stacking headers, this board is ready to use out of the box and sockets neatly under your Pico for a compact, seamless setup. Featuring a MicroSD card slot, PCF8523 Real Time Clock (RTC) with coin cell backup, and a STEMMA QT / Qwiic I2C connector, the PiCowbell Adalogger makes it effortless to add accurate timekeeping, expandable storage, and sensor connectivity to your projects. Perfect for datalogging, IoT, and embedded applications, this board ensures both convenience and reliability.
Key Features

Pre-Soldered Stacking Headers: Comes with 20-pin headers already soldered for quick and easy integration with Pico/Pico W.
MicroSD Card Slot: Expandable storage for data logging via SPI interface (pins 16, 18, 19, CS on 17, optional detect on pin 15).
PCF8523 RTC with Battery Backup: Maintains accurate timekeeping with CR1220 coin cell for years of reliable logging.
STEMMA QT / Qwiic Connector: Right-angle JST SH I2C port (3V, GND, IO4 SDA, IO5 SCL) for quick sensor/expansion connection.
Reset Button: Convenient on-board reset for restarting programs.
Duplicate Pads & Jumper Pads: Extra solder pads for custom wiring and expansion flexibility.
Ground Strip Markings: Clear silkscreen rectangles and a long GND strip for easier prototyping.
Gold-Plated Pads: Ensures long-lasting durability and smooth soldering.
Arduino & Python Support: Works with Philhower Arduino core (IO4/IO5 for I2C) and configurable in CircuitPython/MicroPython.