Practical Electronics/Switches

Switch Switches is a mechanical tool used in electronics to open or close a circuit. Many of switches requires mechanical forces to operates them. There are 3 types of switches that is (i) Push Switch (ii) Toggle Switch (iii) Slide Switch Switch Operation A switch that is switched 'on' / 'closed' allows current to passed thru meanwhile a switch that is switched 'off' / 'opened' stops current from passing thru it. Opened Switch, I ≠ 0 . Circuit is closed Closed Switch, I = 0 . Circuit is opened Types of Switch There are 4 main types of switches that are shown in table below: As you noticed, there are 2 re-occurring terms namely: Pole and Throw. A Pole simply means how many circuits the switch controls. Single Pole controls one circuit with one switch, Double Pole controls two separate circuits with one switch. A Throw simply refers to how many ON positions the switch has. Single Throw have one ON position, Double Throw have two ON position Switches Symbol OperationSingle Pole Single Throw 80px Functions like typical ON/OFF switchSingle Pole Double Throw 80px Switch can only switch ON any circuits at the single moment onlyDouble Pole Single Throw 80px Switch can control 2 separate circuit on the single momentDouble Pole Double Throw 80px Switch can control 4 separate circuits on the single moment (with double operational modes) Reference