Hello, i got 9 RGB Leds and i’d like to control them with my arduino. I do not want to control them seperately, but i want to have them all the same color at the same time. So for this i need 3 transistors and 3 digital pins right ? I tried this: (see attached picture). But it is not working. In this example i just hooked up 1 rgb led, not 3x3 to keep it simple, but it should be the same. Anyone an idea why my circuit in this picture is not working ?
Thanks a lot.