{"title":"Adafruit PiCowbell Adalogger for Pico - MicroSD, RTC & STEMMA QT","handle":"adafruit-picowbell-adalogger-for-pico-microsd-rtc-stemma-qt","url":"/products/adafruit-picowbell-adalogger-for-pico-microsd-rtc-stemma-qt","description":"The Adafruit PiCowbell Adalogger is a Pico-sized add-on board that sockets underneath your Raspberry Pi Pico or Pico W, adding a microSD card slot, real-time clock with battery backup, and a STEMMA QT connector for I2C sensors — everything you need for data logging projects.\n\nThe PCF8523 RTC keeps accurate time even when the Pico is powered off (with a CR1220 coin cell). The microSD card slot provides virtually unlimited storage for reading or writing data. A STEMMA QT / Qwiic connector gives you instant solderless access to I2C peripherals on GPIO 4 (SDA) and GPIO 5 (SCL).\n\nKey Features\n\n\nMicroSD Card Slot – SPI connection on pins 16, 17, 18, 19 with optional card detect on pin 15\n\nPCF8523 Real-Time Clock – I2C RTC with CR1220 coin cell backup for accurate timestamps\n\nSTEMMA QT / Qwiic – Right-angle JST SH connector for solderless I2C (GPIO 4/5)\n\nRight-Angle Reset Button – Easy access from the board edge\n\nPico Form Factor – Same size and shape, sockets underneath the Pico\n\nGold-Plated Pads – Easy soldering with duplicate solder-jumper pads\n\nWhite GND Markings – Ground pads clearly identified with silkscreen rectangles\n\n\nHeader Options\n\n\nStacking Headers – Allows breadboard or accessory connection below\n\nSocket Headers – Solid plug-in connection with no protruding pins\n\nShort Socket Headers – Ultra-slim sandwich (pair with short plug headers on the Pico)\n\nDirect Soldering – Most compact option, but permanent\n\n\n\nTip: With the Philhower Arduino core, Wire is already configured for GPIO 4/5. For CircuitPython or MicroPython, specify SDA=4 and SCL=5 in your code.\n\n\nIdeal For\n\nEnvironmental data logging with timestamped SD card storage\nSensor projects needing persistent timekeeping\nAdding expandable storage to Pico/Pico W projects\n\n\n\nNote: MicroSD card, CR1220 coin cell battery, Raspberry Pi Pico, and headers are not included. A CR1220 is required for RTC battery-backup functionality.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1751,"title":"Default Title","sku":"AF-5703","price":16.45,"on_sale":false,"in_stock":true,"available_quantity":3,"option1":"Default Title"}]}