Rich Nelson wanted to make a unique gift for his brother, and decided on a paper-cut light box of Philadelphia’s skyline, the city where he lives. 

The resulting device is controlled by an Arduino Nano, and not only features a trio of lights and layers to represent buildings and foliage, but also a moving sun and moon display that changes depending on the actual time and date.

Timing is accomplished via an RTC module, while the sun/moon is displayed on a small TFT screen that moves across the sky using a servo motor and extension arm. The build can be seen in the video below, and code as well as CAD info is on GitHub for your perusal.