Quick video showing how I use a Slot.it SCP1 controller with a high amp analog cartridge to control the speed of the motor on my Tire Razor. Since I don't have a variable voltage power supply, I use the ghost car mode on the SCP1 to control the motor speed. It's hooked up to the power supply through a controller hookup box I made for powering test tracks. Simple, effective, and using stuff I already had in my shop.
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