I wired it up to do some bench testing. Unfortunately, I no longer have my old analog VOM meter. Using a digital Fluke VOM, I was not able to see the pulse width modulation as it sampled and averaged the readings at a low rate. I will bring it to work to hook it up to a scope to see what exactly it does. With an analog VOM, I would be able to see the needle swinging back and forth when the PWM takes place. Not with a digital VOM.


If you are not familiar with PWM, basically PWM turns on and off the voltage/current to the load very quickly from hundred of times per second to tens of thousand times per second so you won't notice the flicker at all. My plan is to adapt this dimmer to my motorcycle heated vest.


I connected a 9V battery to the input and measured the output. The output was very linear from 0 to 9.44V (input was 9.46V). The loss was expected. There was no CLICK in the OFF position but when turning it all the way down counterclockwise, my Fluke VOM registered 0V so it did shut it off properly.


So far so good. I like it.