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  1. #1
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    418/433 MHz Transmitter/Receiver Circuits

    Hello

    Can any body help me with crystal based 418/433 MHz schematics that can be easily built, I need them badly.

    Thanks in advance

    •   Alt18th July 2005, 14:44

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  2. #2
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    Re: 418/433 MHz Transmitter/Receiver Circuits

    Google. There ae plenty of designs for crystal controlled FM transmitters for the 430-440MHz amateur radio band on the web. simplest one I'v seen

    You should have a wavemeter to check that the output of your transmitter is clean and will not cause interference to other radio users.
    A frequency counter and a radio scanner would be very usefull.

    There are lots of IC's available such as MAX1470 receiver.



    •   Alt18th July 2005, 21:04

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  3. #3
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    Re: 418/433 MHz Transmitter/Receiver Circuits

    Hi;
    Read texts about communication circuits and design circuit.



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