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Infrared Phototransistor?

  1. Jul 18, 2010 #1
    Last edited by a moderator: Apr 25, 2017
  2. jcsd
  3. Jul 18, 2010 #2


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    Your post makes no sense without showing us a schematic.
  4. Jul 18, 2010 #3


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    It sounds like you are trying to drive a motor directly with a phototransistor.

    This is unlikely to work because the motor needs a lot of current to work and the phototransistor is unable to supply this.

    There was a similar thread last year and you might like to have a read through it and a look at the drawings in it. There were several circuits that would possibly help you.

    Click on this:

    Your motor would be switched by the relay contacts at the right of the various circuits.
    Be careful to include the protective diode where shown in the circuits.
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