Otis Roto Dial

In this project, I design and build a custom controller to run one of these old Otis rotary indicators found on older Otis elevators from the 40s-50s. This style of indicator is different from the newer style as it is an entire disc that rotates as the car moves in the shaft. I was only given the disc and the plate, so it was up to me to make contacts and something to turn the disc. I built a small wooden frame to hold the plate and electronics. I then used a small stepper motor, controller, and microcontroller to run everything. What started as a rather useless piece is now a fully functional fixture!