Ds3231sn Coin Rtc S/bateria Itytarg

Module Features:

1, can provide arduino library files and routines

2, using DS3231SN high-precision clock chip, built-in 32.768 crystal

3, can provide accurate year, month, day, hour, minute, second, morning and afternoon data

4, can output 1Hz signal, output a signal per second

5, you can use the CR1220 button battery to keep going

6, I2C bus pull-up resistor welding R1 R2

7, small size 3cm in diameter

8, pin spacing 22.86mm