Can you believe this is quiz machine?
Well, it is indeed. A real one. The only fake thing here is a keyhole.
Let’s look inside:
4 contact pairs, 4 buttons, 3 batteries and jumbo green LED.
Here are quiz cards
Here is a card in a slot. You can see 3 pairs of contacts disconnected, and 1 pair connected.
I mean, what a weird project choice!
The answer is simple: it is Xenia’s school project. She was asked to build a quiz system, and she built one. I helped a bit, but she did the rest.