Switches - Taking Control

 

We have seen in the last section how switches give us control. They are used to interrupt the current flowing in a circuit. There are many types of switch and places where they are used.

Switches have to be chosen carefully to suit the user and environment they are in. Please go down the page to view some of the different types we commonly use.

 

Rocker Switch

Quick and easy to operate

- used for room lighting

- once operated they stay in the position they have been put.
(latched)

 

Push Button Keyboard
Switches

Easy and comfortable to use.

- Used in standard keyboards
for P.C's.

-once operated they return.

(momentary /non-latching)

 

Membrane Panel Switch

Waterproof, hygienic and
safe to use in damp areas.

- Used for cookers,vending
machines

photocopiers or for flat
surfaces.

(momentary /non-latching)

 

Push Button Switches

- Used for calculators,
mobiles etc where many
switches need to be placed
next to each other.

(momentary / non-latching)

 

S.P.S.T Switches

S.P.S.T. stands for "Single Pole Single Throw". These switches have two connections and as shown previously can either allow current to flow or not to flow in the circuit it has been placed.