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Dimmer Circuit Emits Fire

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by heri, Nov 27, 2017.

  1. tomizett

    tomizett Active Member

    Aug 11, 2013
    Fair comment ADW. I have built mains circuits on varoboard myself, and never had any touble with it, but I just feel a little uneasy recommending others do it.
    When I do, I always use the fiberglass FR4 material rather than the more common phenolic paper FR2, as (I believe) it's less susceptible to absorbing moisture. Of course, I also make sure I allow plenty of creepage distance by clearing unused copper between live traces.

    I think another point to remember is that a comercial PCB will normally have a resist which will keep moisture off the copper and help prevent tracking. Prototype boards won't have this, and so will be more susceptible to moisture and condensation - so a layer of laquer is probably a good idea.
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