Clive Mitchell wrote:
In message , The Natural
Philosopher writes
With pulse width modulation you can accurately dim an LED from full
output to 0.01% with digital accuracy.

But they strobe abominably.

Maybe a capacitor would help..

Not if the PWM is done at a high enough frequency. In some cheap disco
lights the PWM was done at something like 50Hz which they then tried to
hide by softening the edge with a capacitor on the input of the drive
transistor. Their low frequency was down to trying to achieve too much
from a common processor.

My own control system for RGB colour changing uses a PWM frequency of
about 350Hz to avoid flicker.

Sill get strobing effects.
Most disturbing.