Hi people. Im a bit stuck with a project im working on. I have a speed controller im using to control a 24v dc motor, it had a built in potentiometer that i have unsoldered and replaced with wires. I want to attach a thumb or handgrip throttle but i dont think these have potentiometers in them and need a 5v supply is that correct? I cannot supply a voltage to the throttle so trying to find something i can use instead?