I need to sequentially fire 9 heaters arranged in a matrix, each for a set amount of time. I am hoping to use an arduino to control 6 switches (3 for x 3 for y). I would like to use simple triacs to keep cost down after the prototyping stage. Is this possible? What is the simplest way to do this? T…

How to control a 3x3 matrix of 120V-220V heaters

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