A fully autonomous robot that detects and follows a black-line track, navigates curves and intersections, avoids obstacles, and stops at a final end block — all without any human input. It was built at the University of Hertfordshire and entered into a head-to-head university robotics tournament,…

A fully functional adjustable DC power supply that converts a 220V AC mains input into a stable, adjustable DC output. The circuit was designed and verified in Multisim, assembled on a breadboard, and then soldered onto a perfboard enclosure with a digital voltage display, two potentiometers for…