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Purpose of diodes

  1. May 12, 2007 #1
    From what ive gathered a diode is used to make the current flow in one direction but block the flow in the other direction. Does that mean diodes are only used in AC circuits since a DC circuit only flows one way anyway?
  2. jcsd
  3. May 12, 2007 #2
    Diodes are used extensively in AC and DC circuits. In DC, current will flow in a diode from if you hook up the positive battery terminal to anode of the diode and the cathode to negative terminal of the battery. Diode will almost act like a wire. But if you reverse the anode with cathode current will not flow.
  4. May 13, 2007 #3


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    Last edited: May 13, 2007
  5. May 13, 2007 #4


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    Diodes have an enormous number of applications:

    Temperature Sensing
    Signal demodulation
    Radio receiver
    Light sensor
    Light emitter
    Random noise generator

    There are probably more than I'm forgetting.

    - Warren
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