Some electronics help

[sigep1764]

This reminds me a lot of the RC cars and boats that Ive built. When I was young, the speed control was an arm turned by a servo. Depending on which of the three contact points that the arm was swung to, you got three different speeds. When I got older, I could afford ESC's, Electronic Speed Controls. These were digital and depending on the model, could start as low as 10rpm all the way to 50000rpm. I then built a Scale Crawler truck on a ladder frame and invested in an esc with programmable hill descent, hill hold, and individual locking and unlocking diffs. One of these might be able to be programmed to move forward, stop/hold, then reverse. I also may be swimming in the shallow end of the pool with regards to knowledge.

[MaryB]

Got them from amazon.
Here's the link.
It doesn't sat it's PWM, so I'm thinking not.
https://www.amazon.com/gp/product/B0...RHWISCA2E&th=1

Found it under another brand name... not PWN just variable voltage. I would need to see the circuit board to say for sure, any potentiometer added will need to be the right wattage... same for any voltage divider resistor change... PWM is easier since the control electronics vary the width of the pulse, no power flows thru the potentiometer...