Instructions

Game and Knowledge in Electronics-Lab
12
If you install both
switches in parallel,
you will create an
OR circuit. The LED
switches on when you press
switch A OR switch B OR both.
Such a circuit can be used for lighting of a long
corridor. There is a switch at both ends. No mat-
ter from which direction you enter, there will be
a switch available to switch on the light.
8
Two switches in parallel
An AND circuit can
be used for security
switches. A dangerous
machine has two switches,
which must both be pressed.
This prevents the person operating
the machine from having one hand
still inside the hazardous area.