Water Level Indicator (5)

Published:2011/5/17 20:51:00 Author:Sue | Keyword: Water Level, Indacator | From:SeekIC

When there is no water, IC1-IC3 will output low level, VL1-VL3 are not illuminated. When the level is lower than A, IC1’s inside circuit reverses, its 3 pin will output high level, illuminating VL1. When the level reaches B, IC2’s 3 pin outputs high level, illuminating VL2. When the level reaches C, IC3’s 3 pin outputs high level, illuminating VL3. When the level is lower than C, IC3 reverses and 3 pin will have a low level, making VL3 go out.As the level becomes lower, VL2 and VL1 will go out one by one..



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