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A TRIAC is a three-terminal semiconductor component that conducts current in both directions when triggered. It is often used to control high-power AC currents, both as a switch and for "dimmers" for controlling lamps or electric engines.

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Triac power switching

Turns out my triac was broken. I replaced it with another and now the circuit works properly. …
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Triac power switching

The triac in off state shows low resistance between gate and MT1, all other pins are unconnected. … Is my triac blown? Is this a working design at all? (I used this as the base of my desing: http://www.instructables.com/id/Small-Triac-Switch/) …
lszabi's user avatar
  • 187