A deck is a "wafer" carrying contacts you can add to a rotary switch (and controlled by the spindle, of course) to increase the number of circuit poles.
Typically, a normal rotary switch can have up to 12 positions, and on a single deck, you could have 1 circuit, 12 positions or 2 circuits 6 positions, 3 circuits 4 positions, etc.
With a second deck, you double the number of circuits for the same number of positions.
This is for simple, regular rotaries: with custom ones, you can have logic functions, decks having different functions, and the number of positions can be different, generally larger.
Nowadays, with microcontrollers and web interfaces, all of this tends to become obsolete, but for a "dumb", unpowered speaker switch for example, it can still be useful
As said, a deck is a single layer, a wafer, which may be stacked for more switching.
And as said the most common wafer is 12 "points", which may be 1 pole 12 throw, 2 pole 6 throw, what Elvee said.
Both your needs will fit on one deck.
When you need LOTS of switch points you may need more decks. Some pics of many-deck switches attached.
Be glad you don't need such monsters.
And as said the most common wafer is 12 "points", which may be 1 pole 12 throw, 2 pole 6 throw, what Elvee said.
Both your needs will fit on one deck.
When you need LOTS of switch points you may need more decks. Some pics of many-deck switches attached.
Be glad you don't need such monsters.
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