Over-voltage Instruction Circuit Composed of 555

Published:2011/8/12 3:03:00 Author:Joyce | Keyword: Over-voltage , Instruction, 555 | From:SeekIC

As shown in the figure is an over-voltage instruction circuit, which is composed of multivibrator, detection circuit, and LED (light-emitting diode) etc. The multivibrator constitutes of 555, R1, W1 and C1 ect, and it is connected with the collector of the triode and grounding feet 1 of 555. When the monitored voltage exceeds the set value ,the stabilivolt DW will be punctured to break over detector tube BG1.The multivibrator starts oscillation for the connection of power circuit, and the oscillation signal output will drive the LED to flash. Breakdown voltage of stabilivolt DW and the resistance of current limiting resistance R3 can be chosen according to the voltage to be monitored.



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