Illumination Controller (8)

Published:2011/7/6 5:41:00 Author:Sue | Keyword: Illumination, Controller | From:SeekIC

The 220v ac voltage will provide IC1,IC2 and V1-V3 with 9V working voltage after it is reduced by C4, rectificated by UR, stablized by VS, filtrated by C. After IC2 is connected and reset, its Y0 terminal(pin 3) will output high level which will make V1 connected. IC3 will be connected and begins to work. At the same time, the oscillator also begins to work. Then IC1's pin 3 will output oscillate signals which will serve as the count pulse of IC3-IC5. After IC3 begins to count, its Y1 terminal will output high level. VD4 is connected which will make VT1 connected. The first circuit of illuminations HL1 will be illuminated. When IC3's Y2 terminal outputs high level, Y1 terminal returns to low level. VD8 is connected which will make VT2 connected. The second circuit of illuminations HL2 are illuminated while HL1 are off.



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