AJMRTC Precision RTC Module for Raspberry Pi Pico, Pico W, Pico 2, Onboard DS3231 High-Accuracy RTC Chip, I2C Interface, Female Pin Header Stackable Real-Time Clock Expansion Board for Time Stamping,

AJMRTC precision RTC expansion board is designed for Raspberry Pi Pico, Pico W and Pico 2. It uses the DS3231 high-precision real-time clock chip with built-in temperature-compensated oscillator, delivering much better accuracy than ordinary RTC modules. It communicates over I2C bus and adopts stackable female header layout, so you can stack it on top of your Pico board conveniently. With a coin cell backup battery, it keeps running the clock and calendar even when the host board loses power. It supports calendar counting, leap year auto correction, dual alarm functions and square wave signal output. Widely used for data logger, sensor timestamping, scheduled control and embedded timing projects. Raspberry Pi Pico and backup battery are not included.

Specifications

1. Brand: AJMRTC
2. Chip: DS3231 Precision RTC with TCXO
3. Interface: I2C
4. Compatible with: Raspberry Pi Pico, Pico W, Pico 2
5. Connector: Female pin header, stackable design
6. Backup Power: CR2032 coin cell battery (not included)
7. Accuracy: ±2 minutes per year
8. Extra Features: 2 programmable alarms, INT/SQW interrupt output
9. Working Voltage: 3.3V
10. Application: Data logging, time stamping, timing trigger, embedded clock project