In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

I have been using P channel MosFETs on my LED anodes (5v only LED designs) and they really work well to make sure the necessary current is drawn. You will see a difference with them. The only issue is I can only get them in tiny surface mount size so I have to create a special printed circuit board (etched with Radio Shack etchant solution - and they only sell double sided copper boards now so there is more copper to remove so they don't always turn out right). I solder wires off of the board for the 8 anodes (Source +5v, gate from the micro-controller and Drain out to the resistors/LEDs).

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