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transmiter and reciever help Answered

I am trying to build a reciever and transmiter, that when a button is pressed on the transmiter a switch will open on the reciever. ~100ft range. Maybe FM? any good websites

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Cheap answer: Go to the local thrift store and get an old remote controlled car. Strip it all down. now you have a sender and receiver. connect a small relay acros one of the old motor terminals, and there you go.

You can go to discovercircuits.com . It has a lot of information about transmitter/reciever circuits.