To streamline the testing process, I put together a quick and simple testing rig using an Arduino Pro Micro, a tactile button, and a protoboard. This setup allows me to power the POV display and test its functionality efficiently.

Once I connect a USB cable to the Arduino Pro Micro, it provides power to the entire rig, including the POV display. The moment power is applied, I can wave the POV board back and forth to ensure both the front and back LEDs are functioning correctly. If the POV shows the message "SUPERCON8" correctly, it confirms that the basic hardware and display logic are working.

Next, I test the message change mode. This is initiated by double-tapping the POV board, which switches it into a specific mode that allows uploading a new message. This feature is handy, as it lets me reprogram the message directly without disconnecting or resetting the board every time.

Finally, I press the tactile button connected to the Arduino Pro Micro. This button triggers an interrupt routine on the microcontroller, which immediately uploads a new message—in this case, "HELLO"—to the POV display.