Transcription of Study Unit Understanding and Using Electronic Diagrams
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Study UnitUnderstanding andUsing ElectronicDiagramsByThomas GregoryIn your studies so far, you ve learned the basic principles ofhow electrical circuits provide power for useful work. Basiccircuits consist of a power source, components that regulatethe flow of current, and loads such as motors, lights, heat-ers, and more complex devices like computers or and Electronic technicians may work installing,servicing, maintaining, and troubleshooting hundreds of dif-ferent electrical and electromechanical devices from manydifferent manufacturers, on a regular basis. Over the years astandard visual language has evolved that allows designers,engineers, and technicians to effectively describe these elec-trical devices functions. In this unit you ll learn how circuits are described by draw-ings called schematics. These drawings use standard symbolsthat allow technicians to quickly understand how a circuit isconstructed, what function it performs, and how to trouble-shoot the equipment.
diagrams, and block diagrams, and how each is used to describe circuit performance and function • Recognize common electrical component symbols and drawing conventions that describe circuits ... In this case, the 78 means this is a positive voltage regulator, and the 12 means 12 V output. A designation of 79 means a negative regulator,
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