I've been gaining understanding about using PWM for a motor speed controller. I'm developing a project (go kart) that uses a 24V DC starter motor and I want to build a motor speed controller that is somewhat rudimentary/simple.
Is it possible to utilize Arduino technology or some kind of PWM connected to a relay that switches the power supply on and off to the motor at the cycle speed that will act as a 'throttle'?
Or, is there a rudimentary means of controlling the motor speed in 4 or 5 stages (less elegant but equally as effective...)?
Any links to other resources or advice is greatly appreciated.