Pi RTC (DS1307)

The Seeed Pi RTC is based on the DS1307 clock chip and can provide a real-time clock (RTC) for your Raspberry Pi via the I2C interface.

The real-time clock of this module counts seconds, minutes, hours, date of the month, month, day of the week and year, with leap-year compensation valid up to 2100.

The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. If you want to keep this module timing when the Raspberry Pi is powered off, you need to put a 3-Volt CR1225 lithium cell in the battery holder.

Features

• Supports all models of Raspberry Pi Model B or A
• Supports seconds, minutes, hours, day of week, month, year
• Supports 24-hour or 12-hour format with AM/PM indicator
• 56-byte, battery-backed, nonvolatile (NV) RAM for data storage
• Programmable squarewave output signal
• Automatic power-fail detect and switch circuitry
• Product number: Seeed 103030277

Pinout

Specifications

Dimensions	30mm x23mm x15mm
Weight	13.2g
Battery	CR1225 (not included)

Package Contents

• 1x Pi RTC (DS1307)
• 1x 2-pin header

Battery NOT included

Resources

• Product Wiki
• Seeed Pi RTC Library
• DS1307 Datasheet
• Eagle Files