Illumination Controller (24)

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

The 220v ac voltage will provide multivibrator, pulse frequency divider, drive control circuit with about 12v direct current voltage after it is reduced by C1, stablized by VS, rectificated by VD1, filtrated by C2. After the multivibrator begins to work, it generates low frequency pulse signals which will serve as IC's pin 13's count pulse(use the count pulse's reduction trigger counter's method). Under the control of the count pulse, IC's Y0-Y9 terminals will output high level in turn, which will make drive control circuit begin to work through VD2-VD6. The illuminations HL1-HM will be illuminated.



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