Mini Matrix Clock
Four 8x8 matrix LEDS with a motion sensor to activate it the display. Several display modes are randomly generated. Designed and coded by Nick, with only minor modifications. Extra points for identifying the enclosure.
How it's done: Arduino Nano, DS3231 RTC, generic PIR motion sensor, e-bay procured MAX7219 driven LED matrix modules, and a nRF24L01+ radio transceiver module to synchronize time from a master clock.