I'm in the planning stages still for this project.
I want to control 15-20 rows of 2 LEDs with my Arduino. Each row I want to have turn on in sequence. I don't need them to dim just on for 45secs and then off again.
according to the specs each output has a max of 40ma. With both LEDs lit they will draw 40ma per output.
My question is, should I risk it and go directly into my Arduino or should I use relays for each output? The farthest run from the Arduino will be 25ft. My thinking was to use relays but I wanted to get some input.