Nixie tube reverse geocache box

Makezine: Arduino forum member RickP posted his awesome-looking reverse geocache box, which unlocks to reveal its contents only when it's in a certain place on the globe. He uses an Arduino, a GPS sensor, and a trio of nixie tubes, which indicate the box's distance from that special spot. When the button is pressed in that spot, a servo motor unlatches the lid.

Read Full Story >>
The story is too old to be commented.