Hi guys. I'm looking into making a simple RGB LED lighting system for my fresh water fish tank. I'd like to have a few features, such as be able to automatically fade between colors (preferably with an adjustable fade speed via the use of a pot, so it can be easily adjusted on the fly), and have an "over-ride" system that would allow me to select a solid color, again with the use of a pot, so that the color combination can be fine tuned. I also would like it to have a simple on off switch to light all three colors to produce white light, but that's something I can do no problem
I won't be using too many LED's; maybe 4 at the most, since water diffuses the light pretty good, and with less LED's, the shimmering water puts off a neat lighting effect.
I would also like to have it work without the use of a PIC if possible. And that's where I'm hung up. I'm not sure what IC I'll need to make this work, much less how the schematic should be laid out. I can easily make a simple 555 timer circuit to fade a single LED on and off, but I think it would be a little cumbersome to use multiple 555 timer LED fader circuits for the fader part this project...
I'm also at a loss on how to make the solid color adjustable setting work correctly. I would assume just using a comparer like an LM339 and some transistors, but again, I'm not sure where to begin
Any help would be appreciated; my fish and I are growing old of the yellowish tint the 30watt filament bulbs are giving off
Thanks!