simple led flashing question

Discussion in 'Homework Help' started by bug13, Feb 25, 2012.

  1. bug13

    Thread Starter Senior Member

    Feb 13, 2012
    1,276
    43
    I am year one student, please explain how it work, thanks.

    [​IMG]
     
  2. Wendy

    Moderator

    Mar 24, 2008
    21,049
    2,775
    It is your classic astable multivibrator. Ignore the LEDs, they are not really needed for the circuit, though they are a great visual for the current flow. I have built a lot of those in my time.

    http://en.wikipedia.org/wiki/Astable_multivibrator
     
    bug13 likes this.
  3. BillO

    Distinguished Member

    Nov 24, 2008
    993
    137
    That particular one looks like it might have trouble starting, but other than that, assume one transistor has just turned fully on and try to figure out what happens from there.
     
  4. bug13

    Thread Starter Senior Member

    Feb 13, 2012
    1,276
    43
    Thanks Bill Marsden, the wikipedia explain it all
     
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