Your Final Exam for Technical Illustration 1st Semester will be on Electronic Drafting.

Technical Illustrators often have to take sketches from Electrical Engineers and draw out a schematic using the appropriate symbols. It is important for the Illustrator to know what these symbols mean and how to arrange them and label their value in the proposed circuit of the Engineer.

There are Industry standards for symbol representation and you will be provided by a dwg file to access and copy the electronic components that you need from this file.

There are a variety of electronic programs that not only give the illustrator the ability to draw the circuit but it can be tested for its functionality.

Connecting Your Learning

As you work your way through this lesson, you should reflect on the following questions:

Can I Identify the common components of an electrical and electronic circuit?
What are the solder dots or points used for?
What is the difference between an earth ground and a chassis ground?

The State of Arizona has assembled Drafting standards to make sure that Instruction is thorough and well thought out by the instructor. By clicking on the hyperlink below will upload to your browser window the entirety of these standards. The standards that are addressed in this lesson are below the hyperlink.

1.0 USE BOARD DRAFTING EQUIPMENT, INSTRUMENTS AND MEDIA.

• 1.1 Analyze Drawing surfaces for Drafting
• 1.6 Demonstrate Sheet Setup skills

2.0 DEMONSTRATE SKETCHING, LETTERING, AND LINE SKILLS.

• 2.1 Demonstrate freehand sketching skills for drafting applications.
• 2.2 Demonstrate lettering skills.
• 2.3 Demonstrate line work.

6.0 DEMONSTRATE GEOMETRIC CONSTRUCTIONS

• 6.1 Measure Geometric Constructions.
• 6.2 Develop Geometric Constructions.

8.0 APPLY BOARD DRAFTING SKILLS TO COMPUTER-AIDED DESIGN/DRAFTING (CADD)

• 8.1 Demonstrate computer skills for a CADD system.
• 8.2 Create dimensional CADD entities.
• 8.3 Create 3 dimensional CADD drawings.

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The State of Arizona has also assembled Math standards and many of these apply directly to the vocational subject area of Drafting. Drafting is a very precise discipline and the use of mathematics is integral to design and manufacturing. Below are the math standards that are involved in this lesson

1M-P1. Compare and contrast the real number system and its various subsystems with
regard to their structural characteristics

• PO 2. Compare subsets of the real number system with regard to their properties
  (commutative, associative, distributive, identity, inverse and closure properties)

1M-P2. Construct, interpret and demonstrate meaning for real numbers and absolute

• PO 3. Solve real-world distance problems using absolute value
• PO 4. Determine, among the solutions to a real-world problem, which, if any, is reasonable
• PO 2. Define absolute value as the distance from the origin

4M-P1. Interpret and draw three-dimensional objects

• PO 1. Sketch prisms, pyramids, cones, cylinders and spheres
• PO 2. Classify prisms, pyramids, cones, cylinders and spheres by base shape and lateral surface shape.
• PO 3. Recognize the three-dimensional figure represented by a two-dimensional drawing.
• PO 5. Make a model of a three-dimensional figure from a two-dimensional drawing and make a two-dimensional representation of a three-dimensional object (models and representations include scale drawings, perspective drawings, blueprints or computer simulations)

4M-P4. Deduce properties of, and relationships between, figures from given
assumptions

• PO 1. Find similarities and differences among geometric shapes and designs using a given attribute (e.g., height, area, perimeter, diagonals and angle measurements)
• PO 2. Identify arcs, chords, tangents and secants of a circle
• PO 3. State valid conclusions using given geometric definitions, postulates and theorems
• PO 4. Represent pi as the ratio of circumference to diameter
  

1. Create an illustration of an electrical and electronic circuit using the appropriate symbols and their values.
2. Understand the differences between NPN and PNP transistors.
3. Be able to identify the symbols for ground, battery, nodes, resistors, transistors, switches, rectifiers, inductance coils, transformers, LED's, diodes and others.

Key Terms

"click on the key on any of these terms and it will hyperlink to the course glossary"

NPN	PNP	transistors	resistors
ground	chassis	transformers	rectifiers
diodes	switches	battery	DC
AC	capacitors	bipolar capacitors	inductance coils

 

Instruction

You will be given a series of 4 schematic or sketches of circuits and 3 of these will have what the circuit should look like when you are finished. By clicking on the word symbol you will be linked to a drawing file that has electrical and electronic symbols that you can copy and paste into your circuit drawings. Just click on the preceding word electronic symbols. The 4 sketches are as follows:

1. Emergency Flasher.

2. The Radio.

3. The DC Power Supply.

4. The Siren.

I will give more detailed instructions in the Final media disc. Please insert the media disk and listen to the Final.

*Note: The Lessons are best viewed with real player and you can download the latest version by clicking on the words real player.

Your Text Book and Reading Assignments

Summary and Assessment