Torch Circuit

A switch can be used to make the following circuit
open or closed.

Click on the switches to close the circuits.

This is a very simple control system.

Without the switch we couldn't take control. Imagine how
inconvenient it would be at home to have no switches on
your wall to control the room lighting, or on your TV to
switch on the power.

How the circuit works

Using Power from the battery

The power for the circuits above comes from the battery.
Batteries can be low voltage types (1.5 volts) to higher
voltage types (such as 9 volts).

The switch, when closed, will conduct and let the battery
connect to the circuit. In this position the switch “makes the
circuit”.

The switch, when opened, will insulate and disconnect the
battery from the rest of the circuit. In this position the
switch has made an "open circuit"

In our circuit it is also important to match the battery voltage
with the correct lamp to prevent it overloading and getting
damaged. This is the same for many other components in
electronic circuits.