Smooth LED fading via PWM

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  1. - 22nd September 2011, 05:20 #33
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    sayzer
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    Default Re: Smooth LED fading via PWM

    Only if using PWM on a PIC pin , you can directly drive a transistor base without a resistor.
    That will save you one component (resistor) and also space on PCB.

    If you use Mosfet with PWM, you can also directly drive the gate without resistor. But this time, you need to have a resistor between the gate and GND. This resistor is not needed if not using PWM.
    Last edited by sayzer; - 22nd September 2011 at 05:23. Reason: typo
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