This battery monitor circuit is used for monitoring the battery’s condition through the three LEDs. The threshold level of the red LED is controlled by potentiometer 2, yellow by P1 and green by P3.

The setting of each pot is quite critical and must be adjusted repeatedly until the correct threshold level is reached. Finnaly, the pots must be replaced by fixed value resistance values. These resistance values can be found by measuring the actual resistance setting of each pot.
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