====== Switch ======

===== Introduction =====

A switch is a small lever or button. It's an electrical device having at least **two states**, ON (the closed state) or OFF (the open state). 

Ideally, a switch device has zero impedance when closed and infinite impedance when open. The switches on the back of printers and on expansion boards are called DIP switches. 

A switch that has just two positions is called a toggle switch.A "click switch" is called SPST switch.

{{ ::neonking:switches.jpg?direct |}}

===== Some Refs? =====

There is thousands of switches, describing them here would be impossible.
 
You should have a look to <wrap info>[[parts_faq#what_kind_of_switches_do_i_need|Switch Choosing Guide]]</wrap>

===== Connection =====

{{ :neonking:encoder-switch-din.jpg?direct&600 |}}
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==== Matrix Design ====
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{{ :neonking:switchmatrix.jpg?direct&800 |}}