Regarding LEDs - I have one pin supplying X LEDs in parallel with 100 ohm resistor protecting that pin. I need 3 100ohm resistors in parallel with the 3 LEDs? I thought the 100 ohms would protect pin regardless of how many LEDs is on it. I'd agree if going to 3 separate LEDs to 3 separate pins, but don't know enough about LEDs then I guess?
Regarding power supply - Currently I'm using an iPhone wall charger I have, which google says has 1.0 amps, but I could get a wall charger that supplies 2 amps or something. I guess my power supply is whatever it needs to be. Should I try a supply with more amps? Would it make the LEDs brighter? Board would pull whatever amps it needs, no? What's the highest wattage wall charger I could use?
If I hacked a good 3VDC flashlight, would the power supply provide enough amperage, depending on flashlight, I guess?