Spinning LED Display – The Big Picture

This project dealt with timing, frequency, and the phenomenon of persistence of vision. The project required a platform for spinning the display, the display, and the code to run the display.

The base platform is made from sections of 2×4 which provide a sturdy mounting point for the rest of the apparatus. The motor used to spin the LED’s platform is mounted on the wood base. Two ATMega328P boards are used, one for the motor and one for the LEDs. The LEDs are mounted in a breadboard on a separate section of light wood. The light wood and attached components all spin with an external battery allowing for two separate sections of the project.

Successfully getting the persistence of vision words displaying correctly required significant tuning to get the right timing. Another challenge was balancing the spinning section which was solved with weights on the opposite end. The complete product works and demonstrates the fascinating nature of persistence of vision.

An application was also made in the Unity Engine to help generate the necessary characters in a reasonable amount of time.