User:David soemann/sandbox

Logic functions - What humans and electrical control circuits use to make decisions. Humans use the words AND,NOT and OR in everyday logical thinking and communication. When a machine powered by electricity is operating automatically it uses logic functions like AND,NOT and OR to decide which outputs to switch on and off (motors,solenoids,lights etc... and when to switch them. Logic functions are implemented in humans by chemical changes in the brain. In machine control applications logic functions are implemented by the way electrical components are wired together (series,parallel,series,parallel etc...) and the type of switch contacts that are used (normally open or normally closed)