This Giant Crossword Puzzle Features 131 Arduinos

Typically speaking, a DIY project features a couple Arduinos at most. But Robert Mordzon’s giant interactive crossword puzzle is in a league of its own. This awesome art installation — which was made for the National Museum in Warsaw — features 130 Nanos and a Mega for a brain.

Under each square on the table lies an RFID reader, some LEDs, and a Nano. The letters are equipped with RFID tags. This enables the LEDs to illuminate depending on whether or not the correct word is formed as they are placed down.

• No letter: LEDs are dimmed white

• Correct letter: LEDs are green

• Wrong letter: LEDs are red

• Completed word: LEDs play a colorful, disco-like animation

Meanwhile, the Mega communicates with PC over serial, which displays graphic visualizations on a wall.

You can check out the build process and a demo of the crossword puzzle below!