[Greg Zumwalt] nailed it with his “Marblevator Line Follower.” Roboticists will ... Inside the cylinder is a battery, charging circuit, inductive receiving coil, and a motor turning a magnet ...

Now, far from the humble reading light you made in week 2, you should be able to build an autonomous line-following robot to bring the biscuits when your hands are full with mugs of tea.

The little robot, about half the size of a small egg, whirs along on invisible wheels, using a camera on its base to follow any line it's put on. When it meets a branching path, it picks one randomly.

We love a good line-following robot project and this really hits the ... The track he’s using is just some white printer paper with a fat circuit of black electrical tape placed in a somewhat ...