varying control of leds
I'm having trouble controlling brightness of led banks , 24 each RGB, each color connected in parallel. Hoped to use digital pots into op-amps - transistors/w feedback to vary incrementally. I'd appreciate any help - which op-amp, dig-pot, transistor tp use. Or where can I look for info? Using LM358, 2N2222, tried 10K and 100K pots, 5 & 12 volts but very little control between LED on - off. Thanks for any suggestions. Al
Comments
http://forums.parallax.com/showthread.php?p=591981
Hope this helps [noparse]:)[/noparse]
Vern
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