There’s hardly a day that passes without an Arduino ... line follower. You’ve probably seen “bang-bang” line followers that just use a photocell to turn the robot one way or the other.

Some readers may recall building a line-following robot during their school days ... steering motor salvaged from a power wheelchair. An Arduino Mega Pro Mini handles the logic, sending PWM ...

But a company called ArcBotics has created an Arduino-based robot called "Sparki" that ... tutorials will start with "edge avoidance, line following, maze solving, wall avoidance, room navigation ...