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The storage battery voltage monitor (4)

2016-05-10 04:45  
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The storage battery voltage monitor (4)
The working principle of the circuitThe battery voltage monitor circuit consists of resistors R1-R3, potentiometer RP, capacitor C, LED VL, regulated diode VS and time-based integrated circuit IC, see as figure 7-51. The voltage of the battery GB is higher than 10.2V, the 3-pin of IC is outputing a low LEV, VL is not glowing; when the voltage of the battery GB is lower than 10.2V, the 3-pin of IC is outputting a high LEV, VL is glowing, the indicating batter voltage is too low.