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This maze solver is based on Arduino Nano. The power source is four AA Eneloop battries which are really good. A DC-DC boost converter boosts the voltage to 11V for motors and then a linear regulator regulates to 5V for the microcontroller. This has five infrared pairs (receiver and transmitter/ tcrt 5000) for line sensing. The robot at present runs in PI controller but I will apply PID very soon. I haven't completed it, perhaps after exams!
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/maze-solver