Quote:
I wonder if any of the Ring'O'Lights technology would be useful here. Does anyone know how how those are normally driven?

-ml


I see what you mean neat pic I'm guessing the ring is only on the MK2a?

I also found some chips that may allow the LEDs to be operated from the 1 wire bus, but you would need 3 of them per RGB LED plus some other parts. EDIT: the DS2890 is no bargain at $2.07 each in quantity of 240 from Digi key.

a few ideas for the LED configurations the first example uses two driver chips, and the second only one.

PWM channel 00 top button red
PWM channel 01 top button green
PWM channel 02 top button blue
PWM channel 03 right button red
PWM channel 04 right button green
PWM channel 05 right button blue
PWM channel 06 down button red
PWM channel 07 down button green
PWM channel 08 down button blue
PWM channel 09 left button red
PWM channel 10 left button green
PWM channel 11 left button blue
PWM channel 12 top button ultraviolet or knob red
PWM channel 13 right button ultraviolet or knob green
PWM channel 14 down button ultraviolet or knob blue
PWM channel 15 left button ultraviolet or global 4th color or the unused pin can be used as a generial I\O pin.


Edited by n2toh (19/03/2006 16:02)