Gated light switch circuit composed of phototransistor

Published:2012/8/19 22:44:00 Author:Ecco | Keyword: Gated light , switch , phototransistor | From:SeekIC

When people go home at night, they need to find the light switch in the dark after opening the door; or go out at night, they need to turn off the lights in the dark after locking the door. These occasions bring some inconvenience. Gated light switch circuit shown as the figure can turn on the indoor lights automatically when you go home to open the door at noght; or when you go outside at night, the corridor lights can be turned on automatically with delay 40s, so the circuit can bring you convenience. Charged lamp is not lit during the day. The whole circuit is composed of gated switch, light control switch, delay circuit, the RS flip-flop, implementation circuit and power circuit.



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