Switches
A switch is basically a mechanical device that creates a break in a
circuit. When you activate the switch, it opens or closes the circuit. This is
dependent on the type of switch it is.
Normally open (N.O.) switches close the circuit when activated.
Normally closed (N.C.) switches open the circuit when activated.
As switches get more complex they can both open one connection and close another when activated. This type of switch is a single-pole double-throw switch (SPDT).
If you were to combine two SPDT switches into one single switch, it would be called a double-pole double-throw switch (DPDT). This would break two separate circuits and open two other circuits, every time the switch was activated
Normally open (N.O.) switches close the circuit when activated.
Normally closed (N.C.) switches open the circuit when activated.
As switches get more complex they can both open one connection and close another when activated. This type of switch is a single-pole double-throw switch (SPDT).
If you were to combine two SPDT switches into one single switch, it would be called a double-pole double-throw switch (DPDT). This would break two separate circuits and open two other circuits, every time the switch was activated
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