This little thing uses an small single 18650 power bank, Arduino, RTC, an RGB led strip with 7 LEDS. The RTC Checks the time and sees if it's Christmas Eve. If it's not it blinks at one led, if it is the LEDs progressively fill up throughout the day/night.

The enclosure has a removable back to access electronics if needed, the rest is either hot or super glued together. the electronics are just jammed in the compartment closed up.

Arduino Code: https://github.com/nathanmichaelmoore/Santa-Radar