Simple touch delay switch circuit diagram

Published:2011/6/27 4:41:00 Author:Ecco | Keyword: Simple , touch , delay switch | From:SeekIC

Many people live in high-rise housing have installed sound delay switch in front of their doors, they are easy to use, you can also save energy, but sometimes it did not convenient. This voice-activated switch is very sensitive that the slightest sound will cause it action, such as the sound of neighbors opening and closing door, firecrackers outside, and they will make your door lights be lit up, and it does not save power, but also affect the life of the lam. The circuit is very simple, when touching metal films, VT1 is turned on and charging for capacitor C2.



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