http://earthground.8m.com/greco%2010mwfm.htm
http://earthground.8m.com/rss(1)(1)(1).htm

Does anyone have a clue to modify these circuits for remote control, is it possible to use a PIC16F84 to replace the microphone

or does anyone know how to make an even easier circuit for control of 2 devices (it may not contain transmitter or receiver ic`s because i cant get them here)

 

I think you want this: http://www.vekoll.vein.hu/~jap/electronic/codec.html

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No that`s not what i meant, it needs to be without tx or rx ic`s, and it needs to be RF

 

If you used this transmitter for data transmission you would cause wideband interference. There is no harmonic filtering - or even a low pass filter.

What do you want to control?

 

The circuits which you have shown does not contain any TX RX ICs. The IC shown in the receiver circuit is a general purpose audio amplifer chip LM386 which is available easily.
To convert these circuits for remote control all you have to do is construct a monostable filp-flop using IC 555 (search google for schematic)and connect it in place of microphone. Now on the receiver end connect a bistable flip-flop which will toggle on reception of every pulse from the transmitter. The monostable on the transmitter side is not very necessary but it is just to give out a sharp pulse which can also be done by rapidly pressing and releasing a push-button switch.

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in reply to pilot:
i`m trying to make my bedroom automated, i now control it by voice but i want to make an rf remote control, so if i get home i want to turn on my computer and light.

 

Readymade RF modules will make the work very easy.

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"There is no way to peace, peace is the way!"

 

try radiometrix modules...are maded profi's...

www.radiometrix.com

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