I am busy testing a modular 7-segment led clock. Each module can contain up to 3 pieces of 7-segment led displays driven by a 74HC595D shift register. Modules can be combined into larger strings.
In the video the modules are driven by an Arduino Nano 3.0 using the SPI interface. The Arduino is connected using USB to a computer which is running a C# program that instructs the Arduino to display a certain number at a specified position. In the video the UNIX time is displayed.
The goal is to connect the display modules to a server which is connected to the GPS atomic clock and display the exact time.