Member-4-Puneet.

TITLE: The Enigma Puzzle box.

Source: Google

Working Mechanism: The above puzzle box is very different kind of a puzzle box, it is solved both electronically and also mechanically in combined as Mechatronically. Here the locking device is made in the form of solenoid. When the amber LED lights up, the solenoid pulls in its plunger from the "lock" (a piece of MDF with a hole in it) and the box opens. Here when the coin is added into the the slot it turns one the LED and the with the help of the switches provided we have solve and make the another LED to grow and when both the LED lightens up the lock of the box opens and then the puzzle box opens.

Source link: https://cdn.instructables.com/ORIG/FHZ/FZSL/GXZXTKLA/FHZFZSLGXZXTKLA.jpg?frame=1&width=2100

Source Video Link:http://www.youtube.com/watch?v=Zn3AT1inbVE

Source Image: