Questions about choosing component values

Discussion in 'The Projects Forum' started by gte, Dec 2, 2009.

  1. gte

    Thread Starter Active Member

    Sep 18, 2009
    347
    4
    In this circuit, what do I need to take into consideration, when choosing the components values?

    What I'd like to ultimately do is take a pwm output, convert it to analog and trigger a relay with it.



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  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    At what conditions you want to trigger the relay?

    I think you can do it without the need to use PWM but just turn on the uC pin.
     
  3. gte

    Thread Starter Active Member

    Sep 18, 2009
    347
    4
    The PWM is controlled by an ecu, and it is the arbitrary source as to what I need to trigger from, basically a constant if you will.



     
  4. gte

    Thread Starter Active Member

    Sep 18, 2009
    347
    4
    Here is what I ended up doing


    [​IMG]
     
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