SELF_LATCHING_LIGHT_ALARM_WITH_TONE_OUTPUT

Published:2009/6/14 23:00:00 Author:May | From:SeekIC

A decrease in the resistance of the CDS cell when light strikes it activates latch a and b, enabling Lone oscillator c and d which produces an output of about 1000 Hz. RA sets the trip level. S1 resets Lhe circuit.



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