control the water level circuit consisting of 555

Published:2011/7/7 7:15:00 Author:Fiona | Keyword: control the water level | From:SeekIC

The control circuit consists of step-down rectifier circuit, 555 trigger circuit (IC1, IC2), relay control circuit and so on. When the water level probe of the tower B, D is above the water level line, IC1 ② feet is ground potential to make the IC1 place set,the high level output by ③ pin makes the relay J1pick up, contactor J1 -1 is closed,the pumping motor has electricity and runs to pump water; when the water level rises to probe A, corresponding IC1 is reset, the outpu low level makes J1 release,contactor J1-1 breakes,the pumping motor loses the power and stops running, so that it realizes the automatic control of water tower water level.



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