On the one hand, I have never heard anyone complain about the 24hz flicker of a film projector.
On the other hand, half rectified LED christmas lights have noticeable flicker to me and can make me feel irritable and woozy.
My question is, when it's trivial to create a PWM circuit that switches at 20khz or higher, why do manufacturers continue using anything in the 60-500hz range that people seem to notice and complain about? Do they save 2 cents or something?
On the other hand, half rectified LED christmas lights have noticeable flicker to me and can make me feel irritable and woozy.
My question is, when it's trivial to create a PWM circuit that switches at 20khz or higher, why do manufacturers continue using anything in the 60-500hz range that people seem to notice and complain about? Do they save 2 cents or something?