I'd like to build a LED lighting for my house. I've made preliminary tests and I've realized that my 12V transformer emits a considerable electric hum at the Arduino's PWM frequency range (PWM signal from Arduino gets amplified by external amplifier powered by the transformer).
I know, that I can reduce the audible noise if I will drive the PWM at higher frequency, beyond the human ear's audible range.
AFAIK Arduino itself is not able to give me 8-bit PWM at the >20kHz range. Do you know any feasible hardware high frequency PWMs that will work with the Arduino?