Electronics Guru's - LED help (changing all dash lights to 7-color LED's)

[mezzio]

I've decided to take on a new challenge today just for s#!ts and giggles... it's very rice, but I just want to see if I can do it.

I'm going to change all the my interior lights to 7-color LED's, I want to replace the dimmer switch with a push/pull pot, so when it's pressed "in" it acts as a dimmer, and "out" will change the colors of the dash lights.

I know how to solder and wire everything, to get it to work... however, I want the LED's to "remember" their last selected color, so I don't have to cycle through every time I turn on my lights.

So the help I need is, how would I wire them up with a memory? I don't think it would be as simple as running a constant power to them, I think I would need some sort module that would keep the lights "on" their selected color, without actually having them on. I can wire almost anything, but once it comes to designing PCB's and which components to use, I get lost in the worst of ways.

I'm almost tempted to buy a glow shift gauge just to tear it apart and use the guts since they already do the same thing already that I'm wanting to do.

I know people will probably flame the hell out of this, but before you do, think of the time and thought into making this work on a car that was never supposed to have anything like this. I'm not trying to rice my car out, I'm just trying to keep myself and my brain busy with projects

 

[gsxboost19]

well you would have to incorporate a seperate circuit board in conjunction with the circuit in the lights themselves that determine the color. you need to basically splice between the wires and put in a module to do just what you said and create memory without turning on the light. You may not be able to do this with certain light