I created a simple elevator model to demonstrate basic mechanical principles and electrical circuitry. The project started with a concept sketch, outlining the key components: a motor, a pulley system, a platform, and the frame structure. The frame was constructed using erector set materials, chosen for their modularity and ease of assembly. I focused on building a sturdy base and a vertical structure that could support the movement of the elevator platform without bending. The pulley system was set up using spools at the top, where I made sure the alignment was perfect to avoid any snags or missteps in the movement of the platform. For the elevator platform, I used a flat piece of erector set, ensuring it was level and secured it with nylon string to the spools above. I paid close attention to the tension in the strings, which was critical for smooth operation. The electrical aspect involved wiring a motor to a power source through a breadboard, where I could manage the connections and include a switch to control the motor's power. I routed the wires carefully, avoiding any entanglement or loose connections that could lead to malfunctions. I also added limit switches at the top and bottom of the structure to prevent the platform from overextending.