DS1307 I2C RTC DS1307 24C32 Real Time Clock Module for Arduino (Works with  Arduino Boards)

DS1307 is a low power, with 56 bytes of non-volatile RAM BCD code clock calendar real-time clock chip, the address and data transmission through the two-wire bidirectional serial bus, the chip can be 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. AM / PM flag determines clock work 24-hour or 12-hour mode, the chip has a built-in power-sense circuit, brownout detection and battery switching function

Of seconds, hours, minutes, monthly number of days, months, days of the week count with leap year compensation function. Record the year on line 2100.

This is the DS1307 Real Time Clock developed by one of our designer waiman. The module comes fully assembled and pre-programmed with the current time (ok, so it's our current time - MST). The included Lithium coin cell battery (CR1225 41mAh) will run the module for a minimum of 9 years (17 years typical) without external 5V power. The DS1307 is accessed via the I2C protocol.

Memory storage: 24C32 32K I2C EEPROM
With LIR2032 rechargeable lithium battery and rechargeable circuit
With reading and writing function
Using time: About 1 year (Fully charged)
Provide clock signal for microcontroller
Cascade other I2C devices
With full BCD clock calendar chip of 56byte non-volatile RAM
Address and data transmission via serial cable with dual-line dual-direction
The chip can provide second, minute, hour etc information.
AM/PM mark, for working 24-hour or 12-hour
Built-in power sensor circuit in the chip, with brownout detection and battery switch function
Under battery backup mode, power consumption is below 500uA
Accurate calendar up to year 2100
Great for DIY project