Switch

From Simple English Wikipedia, the free encyclopedia

A light switch, with explanations
A light switch, with explanations
A switch in a train system (here a subway)
A switch in a train system (here a subway)

A switch is a something that changes the flow of a circuit. The most common kind of switch is a something (for example a railroad switch) which can be taken off of one course and put on to another. The term "switch" usually means electrical power. In applications where more than one switch is needed, (i.e. a telephone service) mechanical switches have been replaced by electronic switches which can be controlled automatically.

The switch is called a "gate" when used in a mathematical form. In logic, arguments are represented as logic gates. The use of electronic gates to work as a system of logical gates is the basic idea behind the computer —ie. a computer is a lot of electronic switches that work as logical gates.


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