The document discusses a microcontroller-based linear positioning system using a unipolar stepper motor. The system can move up and down along a floor and displays the opening and closing of positioning doors using LEDs. A microcontroller controls the stepper motor driver and positioning based on inputs from microswitches. Components include a stepper motor, driver circuit, microcontroller, LEDs, and switches. The system is programmed in C language to control the motor's movement between four positions.