Hi I have this diac triac lamp dimmer circuit I want to control with an arduino. I replaced it's potentiometer with 2 fixed value 1/2 watt resistors (330K and 130K) so that I always get only 2 predefined set of brightness levels for the lamp. Arduino will control the 2 opto-triacs with the help of …

[Solved] Arduino opto-triac dimmer control

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