Re: Switch question!

Posted by IvIark on Feb 12, 2022; 8:28pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Switch-question-tp50460p50461.html

A SPDT switch is a single pole double throw.  So you have 3 terminals, a common, a normally closed and a normally open.  So for power applications you would usually use the common and normally open.  When you flick the switch the normally open / common connection closes and you complete the circuit.

A DPDT is exactly the same but with two independent poles.  So you effectively have 6 terminals, 2 commons, 2 normally closed and 2 normally open.  Because they're independant they are electrically separate from each other and so you could use one pole for 12V and the other pole for 110V.