103030277, PI RTC (DS1307) Real Time Clock (RTC) Evaluation Board

103030277, PI RTC Board is based on the clock chip DS1307, it can provide a real-time clock (RTC) for raspberry pi via the I2C interface. 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