This lecture presents an engineering project where a mini-robot segway was designed and built, focusing on the fundamental principle of retroactive regulation for maintaining stability. The project involved soldering, electrical path realization, component selection, and the implementation of a PID controller using MATLAB and Simulink for stable vertical positioning. Challenges included cable removal, power connection issues, sensor calibration, and weight distribution problems, resulting in the robot being able to stand on carpet but struggling on smooth surfaces due to wheel hardness.