Just an idea, but if you could easily modulate a signal, then you could just feed it DTMF signals...

A DTMF generator on one end and a DTMF decoder on the other. Both of these can be foung at bgmicro.com

You would be able to send a total of 16 signals (1,2,3,4,5,6,7,8,9,0*,#,A,B,C,D).

The output of the decoders is just a 4 bit number of what tone was detected.

this may not be a cool way to do it, but it sure would be easy...

-
end

>> Hi All
>> Did anyone come across with RC based on pics?
>>
>> I want to build a RC that can send 4-8 different signals that can be PIC
>> "recognized" on the receiver side and operate 4-8 relays.
>>
>> Tal
>>
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