ENG214: Circuit Analysis Laboratory

 

Catalog Information

Course Units: 0.5

Corequisite: ENG 212

 

Course Description

A practical laboratory experience designing, simulating, breadboarding, and testing electric circuits to complement the theory in ENG 212.

 

Primary Textbook

None

 

Course Objectives*

Objective 1: To develop the student’s ability to collect, analyze, and interpret laboratory data in the area of electrical circuit analysis [b,g,k].

Objective 2: To teach students the basic principles of electric circuit analysis [a,b,c,g,k].

Objective 3: To give students the ability to identify, formulate and solve electric circuit problems involving dc, steady state ac, and transient excitation [a,b,c,e,g,k].

Objective 4: To introduce elements of circuit design in a laboratory environment [a,b,d,e,g,k].

 

Course Topics / Outline

Week #1 -   Discuss: Introduction To Lab, Report Requirements and Grading, Tools Required, and Laboratory Safety

Week #1 -   Lab #1: Basic Electrical Measurements and Modeling for DC Circuits

Week #2 -   Lab #1: Continued...

Week #3 -   Lab #2: DC Circuit Analysis with PSpice

Week #4 -   Lab #3: Basic Electrical Measurements and Modeling for AC Circuits

Week #5 -   Lab #3: Continued...

Week #6 -   Supplementary Week for Labs 1 - 3 (no new assignment)

Week #7 -   Lab #4: OpAmps and Transient Circuit Analysis

Week #8 -   Lab #4: Continued...

Week #9 -   Lab #5: Low Pass Filter Networks

Week #10 - Lab #5: Continued...

Week #11 - Lab #6: Filter Design Project

Week #12 - Supplementary Week for Labs 4 - 6 (no new assignment)

Week #13 - Oral Presentations (special meeting time)

Week #14 - Oral Presentations (continued)

 

Evaluation / Grading

Lab Assignments (100%)

 

Submission Policy

The technical reports are due to the instructor one (1) week after they are completed.  Each group of 2 - 3 will submit a single technical report.

 

Performance Criteria:**

Objective 1.1: Students will demonstrate the ability to collect, analyze, interpret and report back      experimental data in this electrical circuit’s laboratory [A,B,C].

Objective 2.1: Students will demonstrate an understanding of dc electrical circuit analysis concepts [A,C].

Objective 2.2: Students will demonstrate an understanding of transient electrical circuit analysis concepts [A,C].

Objective 2.3: Students will demonstrate an understanding of the change in electrical network characteristics with frequency [A,B,C].

 

Contributions

Engineering Science: 90%

Engineering Design: 10%

 

* Lower case letters in brackets refer to Educational Objectives of the department.

** Capital letters in brackets refer to evaluation methods used to assess student performance.

 

Lab Rules

Execution of lab work in a safe manner is even more important than performing accurate electronic measurements and construction neat circuits  The first step is always to become familiar with the lab itself.  You should know where the fire extinguishers and the emergency exits are located.  Equally as important is the location of nearest phone to call for help. You should also know all equipments and substances that are used in the Lab to take the necessary precautions. The ever-present hazard in an electronics Lab is the electric shock. Most people equate the severity of electric shock with the voltage, i.e., a 1,000-V shock is deadlier than a 100-V shock. This is not true. The real measure of a shock is the amount of current that flows through the body.  Obviously, the larger the resistance, the smaller would be the current.

 

Therefore, in order to minimize the electric shock hazard:

 

1. Always power down the electrical equipment, disconnect the power cord, and wait for a few seconds before touching exposed wires. Remember that circuit breakers are usually set for much larger currents (e.g., household breakers are at 15 A and higher) than the current that kill a person (200-300 mA). Do not assume that because your circuit is powered with 5 V, it is not dangerous. In some circuits, capacitors can be charged to a much higher voltage and give you a nasty surprise. Death by electrocution has been reported at a voltage as low as 42 V (DC). 

2. Do not wear rings, watches, necklace, and any any other loose metallic objects. Rings and watches are specially dangerous as the skin beneath them is wet by sweat, making the resistance of skin much lower.

3. Make sure that your hand are dry. Resistance of wet skin can be as low as 1 kOhm as opposed to dry skin which is about 500 kOhm.

4. Make sure that your shoes are dry (specially in rainy days). Do not lean on metallic objects (like legs of the bench tables) as you are providing a very large contact area for the current to flow out of your body to ground. 

 

In case of electric shock, cut the power and/or remove the victim as quickly as possible without endangering yourself. If the power switch is not readily available (remember the Lab Emergency Shut-Off Power switch near the door), use an insulting material such as dry wood, rope, belt, etc. The resistance of body decreases during a shock so action should not be delayed. Send someone to call for help immediately. 

If the victim is unconscious and has stopped breathing, start artificial respiration at once. Do not stop until a medical authority has arrived and taken over. Do not stop even if the victim does not have a pulse. 

 

Safety Rules

1. Each group is responsible for the their Lab bench. After the Lab exercise is over, all equipment should be powered down and all probes, cords, etc. returned to their proper position. Do not cut and drop wires on the Lab bench. Lose cut wires have caused many short circuits. Your Lab grade will be affected if your bench is not tidy when you leave the Lab.

2. Always get instruction on how to use the tools and instruments. Use only the tool designed to do the job in hand. One tool that requires special attention is the soldering iron. Careless use can result in painful burns and fire. Always put the hot iron in its holder. Turn the iron one only when you need to use it and turn it off when you are done (even if you may need it in 5 minutes). The short warm-up time is a small price to pay for the prevention of potential fire and burn hazards.

3. Do not wear rings, watches, necklace, and any any other loose metallic objects (electric shock hazard). Do not wear lose clothing. They cause all sort on un-intentional accidents (from dropping equipments to being set on fire with a soldering iron).

4. No open drinks and/or food is allowed near the Lab benches. Spilled drinks have caused many accidents.