The circuit diagram of using TV remote controller to cut off household appliance power supply

Published:2011/8/11 6:24:00 Author:nelly | Keyword: TV remote controller, household appliance, power supply | From:SeekIC

Using TV remote controller to cut off the household appliance power supply. When the infrared light-receiving diode PH302 receives the remote controller's signal, a low frequency signal is outputed by CX20106A frequency selective amplifier, this low level signal charges to C by D and R, C's negative terminal voltage drops. When it drops to lower than 1/3 VCC, the 555 circuit discharge tube is turned off, the relay is electric shocked and released, the power supply is cut off. In the circuit, RC can set action sensitivity by pressing remote controller for 3~5s. When the power supply turns on, pressing S1 circuit, then the relay is self-locking.



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