Rapid prototyping for music, art and design work

DS1307 Real time clock

DS1307 Real time clock can tell time to Arduino. You can turn off Arduino as a small button battery is attached to the DS1307. Once you  set the right time on the DS1307, it can keep ticking up to 7 years.

The components you need:

  • Realtime clock  DS1307  x 1
  • Clock Crystal 32.768 kHz
  • Battery Holder CR20xx  for a button cell
  • Button cell  (Lithium Battery) 3V Ø 20 x 2,5 mm
  • Arduino
  • Arduino Software v1.0 (the example code  doesn’t work if it’s before v1.0)

 Arduino code

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