Last year I did an awesome Christmas light show at my school using only a few Arduinos and a program called Vixen Lights.

The device displays animated GIF pictures on a rotating cylinder. The GIF pictures can be downloaded from a PC via Bluetooth.

It's a dimmer switch! Create your own touch interface for controlling your Philips Hue lights using Bare Conductive's conductive paint.

A wall of LED where you can spell out messages from the Upside-Down is the best way to impress your friends and to cheat the Demogorgon.

Realtime environment configuration via NDEF records and RFID tags! Just scan to change the text color!