LED Wiring question

[whb64]

Source would be the +5VDC the Arduino puts out on the pins

[madmonk]

For 4 LEDs with a 3V forward voltage you would need a 1/2W 27 Ohm resistor, if you are using red LEDs then you would need a 33 Ohm resistor.

As has been said before you cannot mix LED colours in the circuit, as the different forward voltages will cause problems.  If you want to power red, green and white LEDs you would need 3 separate circuits or add individual resistors to the LEDs.

[whb64]

Resistors definitely are not going to be a problem, I have over 1600 resistors in a wide range of values

[Tankton]

Here is that transistor circuit.

[whb64]

Well I'm just about ready to start my wiring and programming my board