DC RC circuit with buffer

Discussion in 'The Projects Forum' started by Darrell75, Apr 19, 2016.

  1. Darrell75

    Thread Starter New Member

    Apr 19, 2016
    16
    0
    Hi there- the pictured circuit, taken from Forrest Mims RadioShack electronic lab manual, works as illustrated, but if you take out the capacitor, it does not. I'm trying to get my mind around how this is, but I can't quite see it. Can anyone please illuminate this for me? Thanks!

    IMG_20160419_182154757-800x450.jpg
     
  2. SLK001

    Well-Known Member

    Nov 29, 2011
    820
    229
    I would imagine that the capacitor needs to charge to a certain level before the "buzzer" will fire. I'm assuming that the buzzer is a piezo type Sonalert. The cap charges, the Sonalert fires, discharging the cap, then the cycle repeats.
     
  3. Darrell75

    Thread Starter New Member

    Apr 19, 2016
    16
    0
    Thank you for your response. I asked this question elsewhere too. I think part of what I was missing is that the buzzer buzzes at whatever frequency - the tone that sounds continual is the result of thousands of buzzes per second and the discharges you mentioned happen with each buzz. I appreciate the help!
     
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