Hello,

I'm making a motorbike stoplight with automotive (or super bright) LEDs.

The led's datasheet sais that you can power them normally at 2Volts/20mA or at 100Hz with a 1/10 dutycycle without specification of Voltage but only talking about maximum current limitation (200mA !!!).

My questions are:

1.- Did anyone use these leds and would explain me why it should be "pulsively" powered?

2.- PWM won't work below 250Hz (on a 4MHz clocked PIC). Any other way to get 100Hz appart from playing with PAUSEs?