RF circuit

Discussion in 'The Projects Forum' started by AAAGR, Nov 10, 2011.

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  1. AAAGR

    Thread Starter New Member

    Oct 23, 2011
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    I m currently trying to built this circuit
    http://talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.html

    but i can't understand how the 303 MHz frequency is produced. From what i know you are supposed to shift the output of the transistor by 180 degrees before feedback. I dont see how this circuit does so...

    I do understand how to produce the pulses, but as i said i cant see how the modulation occurs...
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. Georacer

    Moderator

    Nov 25, 2009
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    I 'd say so. The link is the same. All related talk should continue on the old thread.
     
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