Hi,
I'd like to dim a 24V single white LED strip. My problem is that I'd like to avoid using PWM frequencies in the audible range, so I'm looking for a LED controller over 20 kHz. My problem is that it's almost impossible to find one, except from some specialized brands made for movie production. For example this is one:
https://store.waveformlighting.com/products/filmgrade-flicker-free-dimmer-for-led-stripOn the other hand, I found cheap motor controllers on Ali / Amazon, for example the popular
ZK-MG one. It can do adjustable frequency between 1-99 kHz.
Would it be equally good to use such a motor controller for controlling a LED strip? I mean it seems cheap, made for higher currents and has the adjustable frequency range. It has a physical knob, which I prefer over any of the "smart" solutions.
PWM in audible range is rarely a problem for leds, only when powering devices that can act as audio transductors, like coils in motors.
Lots of everyday things using led dimming work between 100Hz and 10K without problem.
Having said that, there's no reason why the motor controller would not work with leds, seems a very simple device just toggling a MOSFET.