I put a lot of time and effort into this so I hope you like it. Normally you have to have the distance sensor on the side of the track that the sliders move to when given a positive input, but you can also (theoretically) put the distance sensor on the obj...

This finely tuned microcontroller uses a small motor+generator to measure the voltage of a circuit to within .00002%* If you want to see the graphs and equations I used to calculate the voltage look here: https://www.desmos.com/calculator/ees2qokdra Other ...