RGB LED amplifier / power isolater / I don;t know what to call it
In my car is an LCD stereo that has several RGB LEDs in it's face around the volume knob, the tuning knob, and a few buttons. In the stereo's configuration settings, you can choose what color (7 options) you want these LEDs to display, or an 8th option which cycles through colors.
I really like the idea of adding other lights to my car, just for geek/bling/rice value/for the hell of it/because I can. How could I take the signal for one of those LEDs and use it to CONTROL a small circuit which in-turn would POWER the other LEDs I want to add? I do not want to try to draw enough current directly from the stereo's circuits to power many more LEDs. I am thinking of maybe 20 more LEDs.
A little about me: I could likely print a board, if I really had to . . . I can solder . . . I understand basic circuits but have a little trouble with the math behind things like multiple resistors and voltage drops etc. I have worked a little with LEDs before, including RGB. I am over 30..
Let me know what you think?
Michael, from "DC"