Door 2

The components...a microcontroller HT46F47, some ceramic capacitors and resistors. The capacitors (aka condensers) act as small batteries that charge and discharge rapidly. The resistors are 27 kΩ and 47 kΩ. Resistors are just materials which give electrons a hard time to move through them. Slows them down so to speak. It does not matter which way you connect a resistor because - unlike diodes or capacitors - they do not have a polarity. They conduct (or resist) current equally in both directions of current flow.

Game: The time bomb defusion

Aim of the game: the LED will blink as a ticking timebomb. By placing wires in the right place you can defuse the bomb. If the LED stays on...the bomb explodes! Reset it with the reset button.