Candle Cabinet Puzzle

The operator of an escape room asked us to set up the electronics that would run a number of LED candles on a cabinet. If the candles were blown out in the correct order, the cabinet would unlock, and if they were blown out in the wrong order they would eventually re-ignite.

We used an Arduino to supply the supplied candles with power, turn them on and off, and detect whether the build-in "blow out" detector had turned the candle off. We programmed the Arduino to detect the order in which the LEDs were blown out, and to trigger a magnetic lock to open if the order was correct.

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