555 touching SCR zero-crossing switch circuit（2）

Published:2011/6/14 3:04:00 Author:nelly | Keyword: touching SCR, zero-crossing switch | From:SeekIC

The monostable timing circuit consists of the 555 and D1,D2,RP,C2. The inductive signal makes the 555 reset when thebody touches the metal disc A. When the k contacts 1 and the pre-set time reaches td, it can make the control equipment power-off. If the K contacts 2 , the DPS will be on-state when the pre-set time reaches. td=1.1RPC2. we can use the RP to regulate through the td's long/short.



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