Bathroom Gating Light Exhaust Switch Circuit Composed of CD4001

Published:2011/7/27 5:39:00 Author:Sue | Keyword: Bathroom, Gating, Light Exhaust Switch | From:SeekIC

The control circuit uses gating technology. When someone comes in the room, the gating switch will start the light and exhaust fan automatically which will stop working automatically when it reaches the delay time. It is very convenient and the picture shows the circuit. The circuit uses one 412 input terminal or NOT GATE CD4001, two gates D1,D2 of which will compose one no triggered monostable delay circuit. Its delay time is decided by RP1's resistance value and C4's capacitance. The other two gates D3,D4 are connected and will be used as phase inverter and amplifier.



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