RTC DS3231 module - real time clock - I2C - for Raspberry Pi Pico - Waveshare 19426

An expansion module for theRaspberry Pi Picoin the form of anRTC real time clock. Featuring a precisionDS3231chip, it uses theI2Cbus to communicate with theRaspberry Pi Pico. Its design allows you to add multiple peripherals that connect to each other on astackbasis. The board has an additional holder for aCR1220pastille battery, which can be an alternative power source. The RTC clock counts downseconds,minutes,hours, days, months and years with leap year compensation valid until2100. The time is displayed in two formats: 24-hour or 12-hour with AM/PM indicator. Additionally, it has two programmable alarms.

Compatible withRaspberry Pi PicoThe manufacturer provides aproduct wiki pagethat provides information about the DS3231 RTC module pinouts and a user guide with configuration instructions.

• Compatible with:Raspberry Pi Pico
• RTC chip: DS3231
• Real time countdown: seconds, minutes, hours, days, months and years (with leap year compensation valid until 2100)
• Time format: 24-hour / 12-hour with AM/PM indicator
• Alarm: 2 programmable alarms
• Operating voltage: 3,3 V
• Alternative power source:CR1220cell battery
• Built-in holder for additional battery: yes
• Power consumption: 100 nA (during data backup)
• Communication interface: I2C
• Equipped with standard connectors to connect withRaspberry Pi Pico
• Operating temperature: from -40°C to 85°C
• External dimensions: 52 x 21 mm

• Manufacturer's website: Waveshare 19426
• Product Wiki page
• DS3231 Technical Documentation
• Schematics