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CADD-2 Lesson 5

Elecrical Drafting and Schematics

Electronics has to do with the flow of electrons moving through metal conductors and other conductors.
Voltage Electrical pressure
Current A steady stream of electrons
Direct Current a flow of electrons through a circuit in one direction only
Alternating Current is a flow of electrons in one direction during a fixed time period, and then in the opposite direction during a similar time period
Series circuits are those in which the current flows from the power source through one resistance after another
Parallel circuits let the current flow through more than one path simultaneously
Circuit Board Uses metal, generally copper, printed on a composite board to take the place of wires. Printed Circuit Boards are usually drawn at a much larger scale (4 to 400 times it’s normal size) to show specific details
Conductors Material with a small resistance to the flow of electrons.
Insulators Material through which electrons will not flow
Single Line Diagram Shows the course of an electrical circuit using single lines and graphic symbols.
Schematic Diagram Shows the ways a circuit is connected and what the circuit does.
Block Diagram Usually made up of squares or rectangles connected by single lines. Shows how the components are related when the circuit is working.
Wiring Diagram Simply shows how the components of a circuit are connected.
Created by: tmurphy
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