Here’s a nice collection of line-following robots (translated). They’re fast and they stay on track even through sharp turns. They center around a Baby Orangutan board which features an ATmega328 microcontroller and two motor driver channels. These drive the geared motors and use optical sensors to track a dark line on a light surface. There’s plenty of build and testing information (translated) if you’re interested in the gory details. Or just jump past the break to see the red on doing its thing.
