Hi everyone (=
I want to conduct a series of experiments determining the effects of a handful of parameters of an RC car on its breaking performance. In order to do so I need to get the car up to a certain speed and trigger the breaks at a specific point.
For the latter I want to use a light barrier which transmits the breaking command wirelessly to an Arduino in the car which controls the ESC via PWM.
However, I am stuck at reaching and maintaining a certain speed with the car. I can’t really measure the RPM of the drive shaft because of how the car is built. So I am stuck with measuring from the outside. Could you please recommend ways I could achieve my goal?
Any help is highly appreciated (=