williB said:
mike , very interesting project you got there..
question : you are using the same pwm ratio for the three colors right?
Hi Willi (and Oznog too),
Yeah, I thought about adjusting the PWM to compensate for brightness levels between elements... Though, I'd still like to get as close as possible with the resistor values...
you could use a varible resistor on all three till you find the right combination..
I don't have any pots' but I've got a good range of resistor values... Perhaps I'll just put a couple small machined pin sockets on the first prototype board to plug resistors into...
I'll probably put another three 2N7002's on the board to drive the LED too... I don't want to burn out the 12F683...
Thanks for the suggestions guys... Regards, Mike
<added>
Anyone out there with PC programming expertise willing to write a little PC control app' with slide controls for the three LED values, etc.? I plan to implement a simple RS-232 command language, perhaps something as simple as sending strings like; "7F,FF,00,<cr>" for the Red, Green, and Blue values... Maybe even add some effect commands like, 'fade', 'from value', 'to value', 'delay', 'repeat'...