Electrical and Electronics Drafting (using pre-computer and CADless methods)--Article index

INTRODUCTION

Electrical and Electronics Drafting provides you with basic instructions in electronics drawing. It begins with a review of drafting fundamentals including drafting tools, inking methods, and taping methods. Electronics drafting topics include the meanings of electronics terms, electrical component descriptions, electronic component symbols, reference designations, and PC board conductor spacing. You will learn the proper use for symbols in block diagrams, flow diagrams, single line diagrams, schematic diagrams, and logic diagrams.

Electrical and Electronics Drafting teaches you to think, create, and draw in a logical sequence. You are asked to begin with a sketch. From this, you will generate all of the formal schematic drawings, parts lists, wiring designation lists, printed circuit board layouts, PC board artworks for photoresist exposure, PC board marking artworks, and packaging drawings.

Electrical and Electronics Drafting is written in concise, easy-to-read language and illustrated with hundreds of photos and drawings to help you learn. The guide typically provides you with two visual examples for each major topic covered. You will have the opportunity to complete many problems to aid in your learning experience. The questions provided at the end of each Section emphasize the important information covered in the text.

USING THIS GUIDE

1. Read the objectives for the Section. They will tell you what will be learned by studying the Section.

2. Preview the Section. Scan through the Section headings. Read the illustration captions and look at the illustrations briefly.

3. Study the Section carefully. Refer to and examine the illustrations as soon as they are called out.

4. Complete the review questions. Try to answer as many as you can without referring back into the Section. Restudy any that you cannot answer from memory.

5. Work the electronic drafting problems. Ask your instructor for any additional information about doing the problems.

A. Obtain the correct materials for the problem: paper or vellum, pencil or pens, drafting instruments, etc.

B. If needed, make a rough sketch of the project in pencil. Your instructor may want to check your work before you progress too far.

C. With some problems, you may need to prepare outlines, starting points, or draw light ruled lines. Sometimes, this may be done before coming to class.

D. Make sure you know all of the details of the problem before doing too much work. Your instructor may hand out information sheets for each problem or may verbally give details.

E. Ask your instructor for help with a problem if you are in doubt.

1. INTRODUCTION to Electrical and Electronics Drafting

Engineer’s Responsibilities, Drafter’s Responsibilities, Job Levels in Drafting, Types of Companies, Skills Required

2. DRAFTING FUNDAMENTALS

Freehand Lettering, Mechanical Lettering, Linework, Equipment and Media, Geometric Construction, Orthographic Drawings, Auxiliary Views, Sectional Views, Drawing Title Blocks, Types of Drawings, CAD/CAM Functions, Computer Parts, Computers in Electronic Companies

3. BLOCK, FLOW, AND SINGLE LINE DIAGRAMS

Block Diagrams, Rules for Drafting Block Diagrams, Flow Diagrams, Rules for Drafting Flow Diagrams, Single Line Diagrams, Rules for Drafting Single Line Diagrams

4. ELECTRONICS SYMBOLS, COMPONENTS, AND REFERENCES

Relationship of Components and Symbols, Semiconductors, Capacitors and AC/DC Components, High and Low Frequency Components, Input and Output Indicators, Rotating Machinery, Circuit Returns, Standards, Symbol Modifiers

5. SCHEMATIC AND LOGIC DIAGRAMS

Drafting Schematics, Rules for Drafting Schematics, Reference Designations, Series and Parallel Circuits, Logic Diagrams, Logic Terms, Rules for Drawing Logic Diagrams

6. WIRING DIAGRAMS

Schematic, Wire List, Bus Wire, Shielded and Coaxial Cables, Wire Termination, Point-to-Point Wiring Diagrams, Highway Wiring Diagrams, Baseline Diagrams, Interconnection Diagrams, Cable Assembly Drawings, Wire Harness Assembly Drawing, Notes Used on Wiring Diagrams, Terminal Identification

7. PRINTED CIRCUITRY

Advantages of Printed Circuits, PCB Layout, Design Scale, Conductors, Board Size and Style, A Sketch for a Layout, Prepare Formal Layout, Red and Blue Artwork, Multi-sheet Artworks, Taping Techniques, Etching a PCB, Drill and Trim Drawing, Assembly Drawing, Silkscreen Drawing Option

8. PACKAGING DRAWINGS

Welding, Mechanical Fasteners, Adhesives, Finishes, Plastics, Aluminums, Steels, Drawings for Welding, Working with Sheet Metal, Sheet Metal Terms, Bend Dimensioning, Limitations in Sheet Metal, Methods of Dimensioning, Angular Dimensions, Developments

9. PICTORIAL DRAWINGS

Isometric Drawings, Isometric from Orthographic, Drawing an Isometric Ellipse Using a Compass or Template, Long Axis Isometric, Isometric Freehand Sketching, Dimensioning Isometrics, Cavalier Obliques, Cabinet Obliques, Holes in Oblique Drawings, Exploded Drawings

10. Electronics Drafting USING AUTOCAD [coming soon]

Creating Symbols, Creating Blocks, Creating Wblocks, Inserting Symbols, Altering Symbols, Stretch Command, Creating Layers, Plotting Drawings

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