1.2.2. Switches

Working with mechanical switches is extremely important, but very easy to understand. The following figure shows 4 types of switches that are self-explanatory.

Figure 1‑23 Different types of switches
(Source: referenced)

SPST – single pole single throw – a switch that turns the circuit on or off

SPDT – single pole double throw – a switch that turns on 1 of 2 circuits alternately

DPST – double pole single throw – a switch that turns 2 circuits on or off at the same time

DPDT – double pole double throw – a switch that controls 2 by 2 circuits at the same time

Back

Contents

Forward

References:

https://commons.wikimedia.org/wiki/File:Relay_symbols.svg