Product introduction:
DS1307 is a low-power, full BCD code clock calendar real-time clock chip with 56 bytes of non-volatile RAM. Address and data are transmitted through a two-wire bidirectional serial bus. The chip can provide seconds, minutes, hours and other information , The number of days in each month can be adjusted automatically. And there is a leap year compensation function. The AM/PM flag bit determines that the clock works in 24-hour or 12-hour mode. The chip has a built-in power sensing circuit with power-down detection and battery switching functions.

DS1307 Features:
It can count seconds, hours, minutes, days of the month, months, and days of the week, and has the function of leap year compensation. Yearbook Online 2100
56 bytes of nonvolatile RAM
Two-wire serial interface
Programmable square wave output
Automatic brownout detection and switching circuit
In battery backup mode, power consumption is less than 500A

Package includes:
5 x Tiny RTC I2C Real Time Clock Module
5 x 5Pin Straight Single Row
5 x 7Pin Straight Single Row