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  1. - 29th June 2006, 01:15 #2
    dhouston's Avatar
    dhouston
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    Triacs automatically turn off at zero crossing. You control how long they are on during each half-cycle by controlling the point where the triac is turned on by a gate signal. Powerline control signals (e.g. X-10) are usually sent just before or after ZC as that has the lowest noise.
    Last edited by dhouston; - 29th June 2006 at 01:17.
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