555 AC timing switch controller circuit

Published:2011/9/18 22:13:00 Author:Ecco | Keyword: 555 , AC, timing switch , controller | From:SeekIC

As shown in Figure 4-22, the controller includes the buck rectifier, monostable AC solid relay. And 555 and R1, RP1, C4, etc. form a monostable circuit, clicking the AN, the pin 3 of 555 is in high level, the AC output of AC solid relay turns on, load is connected, timing begins. Regular time is the monostable transient stability time td = 1.1RP1C4, the longest time of icon argument is about 30 minutes, it can be adjusted by RP1.



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