Mystery Box A scavenger hunt for vintage artifacts reveals a hidden treasure TAGS: arduino,fabrication,sensors,microelectronics . Revealing the secret door The box uses photovoltaic sensors to determine if objects have been placed properly into their appropriate spots. When all items are in place, a servo moto activates a secret door. Finding the Box The box was hidden in the woods of western Connecticut, near a frozen waterfall. Prototyping Strip wire. Solder wire. Test. Repeat. Electro Guts So many tiny parts. So little room. Tracking down the clues Find the mystery man. Find the box.