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== Switch Basics == | == Switch Basics == | ||
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A switch is often to turn something on or off. In the simplest case it is just a wire that is connected or not. Unplugging an appliance is one way to switch it off. A switch is usually a mechanical device where some sort of handle connects or disconnects conductors inside the switch. Another way of thinking of a switch is that it is like a resistor that sometimes has infinite resistance and sometimes has 0 resistance. A computer keyboard is made of a large number of switches. Some switches stay in the on or off position, others only stay on or off while you switch them, these are called momentary switches. A light switch is normally not momentary, a doorbell switch normally is momentary. | A switch is often to turn something on or off. In the simplest case it is just a wire that is connected or not. Unplugging an appliance is one way to switch it off. A switch is usually a mechanical device where some sort of handle connects or disconnects conductors inside the switch. Another way of thinking of a switch is that it is like a resistor that sometimes has infinite resistance and sometimes has 0 resistance. A computer keyboard is made of a large number of switches. Some switches stay in the on or off position, others only stay on or off while you switch them, these are called momentary switches. A light switch is normally not momentary, a doorbell switch normally is momentary. | ||
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*[http://en.wikipedia.org/wiki/Electrical_switch Switch From Wikipedia,the free encyclopedia ( inc. Schematic and Picture )] | *[http://en.wikipedia.org/wiki/Electrical_switch Switch From Wikipedia,the free encyclopedia ( inc. Schematic and Picture )] | ||
*[http://www.kpsec.freeuk.com/components/switch.htm Switches] | *[http://www.kpsec.freeuk.com/components/switch.htm Switches] | ||
| − | * [[Switch Terminology]] _P_T - SPST - SPDT - DPST - DPDT - 3PDT - .... | + | * varc4tb [[Switch Terminology]] _P_T - SPST - SPDT - DPST - DPDT - 3PDT - .... |
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== Relays == | == Relays == | ||
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*[http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=119 Controlling Big, Mean, Devices] | *[http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=119 Controlling Big, Mean, Devices] | ||
*[http://www.kpsec.freeuk.com/components/relay.htm Relays] | *[http://www.kpsec.freeuk.com/components/relay.htm Relays] | ||
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[[Category:Components]] | [[Category:Components]] | ||
