Problem With 220 VAC Halogen Lamp Dimming

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  1. - 5th August 2014, 16:18 #7
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    Acetronics2
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    Default Re: Problem With 220 VAC Halogen Lamp Dimming

    Hi,

    I noticed a little funny thing while building a dimmer ...

    take care to the input port behaviour vs input ( TTL or ST ? ) AND the applied rectified voltage ...
    the zero detection can occur very, very late from what is expected ...

    scoping what happens is very interessing.

    I solved it using the falling edge detection and applying a small delay leading precisely to the very beginning of the rising edge - 'scope used here -.

    so, the zero detection is very precise.
    ( application is a 250W IR Lamp for heating my hens home ... )

    Alain
    Last edited by Acetronics2; - 5th August 2014 at 16:21.
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