Sunday, April 8, 2018

12 volt battery level indicator

It will indicate the charge level of a battery by a LED bar-graph which contains ten LEDs. We use voltage divider theorem to divide the battery voltage because the arduino can take maximum 5V as analog input.

  • Greater than 10.5V (25%)
  • Greater than 11.5V (50%)
  • Greater than 12.5V (75%)
  • Greater than 13.5V (100%)


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