Schematic: Simple battery monitor

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Schematic: Simple battery monitor
By Ibrahim Kamal
30/5/2007

Brief Circuit explanation:

This is a very simple but effective and accurate battery monitor. The 4 LEDs D1 to D4 acts like a bar graph.

R6 will adjust the threshold of the whole system (the point at which the battery is considered to be LOW)

D5 is just a power indicator.

This circuit could be simple modified to make an 8 LEDs battery monitor (or more!)

The output of one of the op-amps can be fed-back to a microcontroller to give a signal when the battery is low.

Any questions? find answers or ask your questions in ikalogic forum

ikalogic.com: Electronics and Robotics related projects.

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