Sound Control Twinkling Illuminations(3)

Published:2011/7/10 7:57:00 Author:Sue | Keyword: Sound Control, Twinkling, Illuminations | From:SeekIC

The 220v ac voltagewill provide the sound control circuit and IC with 6.8v direct current working voltage after it is rectificated by UR, limited and reduced by R13, stablized by VS, filtrated by C5. S2,R6,R7,RP,C4 and IC's pin 9-11's inner circuits will compose oscillator circuit which will provide IC with count pulse. IC's Q4-Q6 terminals will output control voltage signals which will make VT1-VT3 connected by R8-R10,VD1-VD4,V3 in turn, or it will make two thyristors connected at the same time(or make 3 thyristors connected at the same time). HL1-HL3 will be illuminated in turn or two groups of illuminations will be illuminated at the same time(or 3 groups of illuminations will be illuminated at the same time).



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