Will I need a transistor to power 8 LEDs from one Arduino pin?
I am looking into building a project where I will have 25 sets of 8 3v 20ma LEDs. I am wanting to control each set from one output pin. I am almost certain that the Arduino card itself would not be able to power all 200 LEDs at once. Because of this I believe I will need to set up some kind of transistor array? I am new to all of the building aspects of such circuits and what not. So my question is what type of transistor will I need to get the desired power to light up all LEDs at once without burning out the card?