This tutorial will use a momentary normally-open single-pole single-throw pushbutton type of switch. Switches are considered “on” when they are conducting electricity and “off” when their contacts are disconnected. Switches can also be constant (flip style) or momentary (only “active” while being depressed). For instance, a single-pole double-throw ( SPDT) switch will conduct electricity in two distinct paths when the single switch is activated. Multiple distinct switches can be combined into a single device that has multiple poles (separate switches) and/or multiple throws (separate conducting paths). They can be either normally-open ( NO) or normally-closed ( NC), meaning that their contacts are normally disconnected (does not conduct electricity) or connected (does conduct electricity) respectively. toggle, pushbutton, relay, rotary, etc.) used for various applications. There are many different types of switches (e.g.
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