I realize (and I think jacob does too) that to change the color all you have to do is swap the LEDs, but scot said it should go "from red to blue" which makes it sound like instead of a black to blue progression, a red to blue one. Wether or not that's what he meant, it's a pretty neat idea which could be accomplished with an inverter chip.
Sigma, you are on the right track. I realize that if you wanted to simply change out the blue leds to red ones, that would not be too difficult. However, to go from red to blue, as stated, that would require an inverter chip as sigma stated. This would be quite a bit more difficult. I have a powermate in my hand now , so I do know what colors they change from and to.
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