Undervoltage alarm circuit diagram

Published:2014/3/13 22:58:00 Author:lynne | Keyword: Undervoltage alarm circuit diagram, | From:SeekIC

This circuit is a low-pressure alarm circuit 5V power supply, only one and not gate CC4011, with LED indication. Circuit is simple, reliable, low-power consumption. Supply voltage is high enough, G1 output low, G2 output high, light-emitting diodes. When the supply voltage drops to the set value, an input terminal of the G3 becomes a low voltage, high output G1. Thus, the pulse oscillator G3, G4 composition produced by the light emitting diode G2 flash frequency of the oscillator frequency, three times per second.When mediation, just need power plus the minimum allowable value (eg 4V), then change the position of the potentiometer arm, so that the output of G1 can just flip.



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