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 2 2N222A transistors.
Below is a circuit diagram with MOC3020.
The problem is I have trouble deciding what type of opto-triac should I use. There is MOC3020 non zero crossing model and then there is MOC3083 with zero crossing. Which one should I go for?
The load will be 12W led lamp driven using a dimmable CC driver.