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Radio Shack Special and 10mW transmitter

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Maddog_rvo

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**broken link removed**
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)
 
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.
 
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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