The Rotating LED Display is a group of LEDs that are connected as a straight line. The LEDs blink so fast that when they are rotated, they create an image that the human eye can see. This concept is called Persistence of Vision (POV). The LEDs display a digital clock and temperature while rotating using a motor. In addition, the temperature data is being sent via Bluetooth Module that is connected to the temperature sensor.
V. Kepuska, J. Hadjilogiou
Shamsah, Mohammad; Alhamed, Kassim; Meer, Abdulrazzaq; and Al Loughani, Mohammad, "Rotating LED Display" (2015). Electrical Engineering and Computer Science Student Publications. 19.