https://www.amazon.com/DROK-Controller-Regulator-Adjustment-Potentiometer/dp/B00J20OL7C/ref=sr_1_1?ie=UTF8&qid=1476988947&sr=8-1-spons&keywords=drok+pwm+40a&psc=1

Is there a slide potentiometer that will work with this?

If not, how many degrees of rotation does it use to go from 0% to 100%?

I’m actually trying to make a foot pedal to operate this and that is why a slide potentiometer would be optimal. But any other suggestions would be greatly appreciated