DTMF Infrared Remote Controller of LM567 Encoder

Published:2011/7/17 10:24:00 Author:Michel | Keyword: Encoder, Infrared, Remote Controller | From:SeekIC

Besides special encoder, DTMF decode still can use phase locked loop audio decoder, LM567 to decode. But there is only one kind of frequency when the frequency signal is output after the LM567 decoding.The frequencies output by two decoders constitute one group of control signals.As shown in the picture,infrared remote control signal is transmitted by DTMF and infrared remote control switch is composed of two LM567 decoders.The circuit consists of twelve channel coding circuit DTMF infrared remote transmitters, infrared receiving voltage amplifier, the channel signal decoder, switch controller and relay and its driving circuit.



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