Hi,
I'm interested in building a path following robot (will probably use Arduino Uno) with just a single IR sensor (to detect path) and two wheels (using a DC motor per wheel) and the cheapest motor controller I can get. I've seen a bunch of Youtube videos where people have used the PID library to make it follow the path more accurately but I don't fully understand how its applied. Can you offer any guidance/examples or point me in the direction please?