You might probably hear about the Ping Pong Display before, but have you ever tried to build a Ping Pong Display? If you haven’t, then you should take on this opportunity…

First of all, you should notice that this Ping Pong Display is not a small stuff, as it has a resolution of 20×12 pixels and with the size of 5m x 2.5m! The LEDs are actually a 40 AVR ATmega48 via hardware-controlled PWM that based on two AVR boards.

The boards with the AVRs have been glued in plastic boxes attached. After that, the LED strands are sent to the boards plugged into the boxes.

A PC will take over the control of the display. It generates the data and sends it via a commercially available Ethernet cable to the display via RS485. Then, the data will be processed by an AVR to the next via a serial port. The LEDs of the new AVRs is setting, once all the controllers have the new record!

By the way, the main reason why the ATmega48 is used, because it controls six LEDs, includes the six hardware PWM channels with eight bit resolution at once!