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DTMF remote control circuit

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dtmf remote control circuit

Hi all,
I wanted to build an remote control unit using dtmf, transmitter as well as receiver to control electrical appliances for ON and OFF.
Suggest me a simple circuit which has least components also some ideas about dtmf ICs.
Thanks in advance.
 

dtmf remote control circuit

Zarlink (www.zarlink.com) has both DTMF transmitters , receivers and transceivers
 

dtmf encoder circuit

Try searching a list of basic telecom / switching ICs. you will see lots of DTMF encoder / decoder combinations
 

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