Secret light signals
2
Behind door number 2 you will find a push-
button switch with four connection pins.
Install it in the circuit so that it turns on the
power as soon as you press the button. Two
of the connections are connected inside.
If you have installed the push button the
wrong way around, the power will always be
on. When the LED lights up as soon as you
press the button, it is correctly installed. Use
the light button for Morse messages or for
secret signs that no one else knows.
The inner workings of a push-button
Inside the push-button switch there is a slightly upward curved sheet
which is pressed into place by pressing the button. At a certain force, it
clicks, and the sheet metal bulges downwards. It touches the contact in
the middle and thus closes the circuit.
