3V BJT astable gen

Discussion in 'The Projects Forum' started by Jony130, Feb 1, 2011.

  1. Jony130

    Thread Starter AAC Fanatic!

    Feb 17, 2009
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    Hi, can you suggest any simply diagram of a BJT astable generator, supply from 3V and capable to gen wave from range 500KHz to 2MHz.
     
  2. Potato Pudding

    Well-Known Member

    Jun 11, 2010
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    The frequencies are high is problem number one. You need to pick the right transistors.

    The Voltage is low but anything over 1.5Volts is not too difficult.

    You already answered your own question by specification of an astable.

    Modified Astable to more closely match your specs.
     
    Last edited: Feb 1, 2011
  3. Potato Pudding

    Well-Known Member

    Jun 11, 2010
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    This one is about 2 MHz use some type of trimmers to tune the frequencies.
     
  4. Jony130

    Thread Starter AAC Fanatic!

    Feb 17, 2009
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    But in this circuit I need change two capacitors if I want to change the frequency
     
  5. Potato Pudding

    Well-Known Member

    Jun 11, 2010
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