> >>> I ran into a peculiar situation with these super high brightness
> >>> devices: they radiate an inordinate amount of RF when switched.
> >>> My approach was to PWM the LEDs to control brightness, but it failed.

I would have thought you could PWM and then smooth so that the LED's only
saw the resultant DC. The response curve would be very sensitive to
variation as, rather than being well on and fully off as they would be with
PWM, they would be being held partially on constantly. This approach MUST
eliminate the PWM effects on the LEDs as they only see DC.


        Russell McMahon

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu