COLELGE MOHAWK OF APPLIED ARTS AND TECHNOLOGY Department of Electrotechnology
A) IDENTIFICATION ITEMS EE362
COURSE NAME COURSE CODE PROGRAM NAME
INTRODUCTION TO TELECOMMUNICATIONS LAB EE362 Computer Electronics Engineering Technology Electronics Engineering Technology Electrical Control Engineering Technology Total Hours - 28 Electrotechnology Engineering Technology Total Weeks - 14 Hrs/wk - 2
DURATION DEPARTMENT FACULTY
This course is eligible for credit through the "prior learning assessment process" (P.L.A.). Students wishing to be assessed for prior experiential learning should contact the P.L.A. office. PREREQUISITE COURSES General Promotion Policy: In order to register in all courses the next semester, all previous courses must be completed with no more than one outstanding failure. Students with two or more failures may take courses for which they have the necessary course prerequisites. In order to register in a lab course, the student must be registered in, or have successfully completed the corresponding lecture course. Prerequisites: MA279 EE251/252 Co-Requisite: MA379 EE351
GENERAL COURSE OBJECTIVES(S) The objective of this laboratory course is to illustrate and exercise the theory of the accompanying lecture course EE351. The actual experimentation will give the student experience in breadboarding, trouble-shooting and testing circuits. REVISIONS Fall 2008 Larry Petkov Fall 2009 Larry Petkov
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REQUIRED TEXTBOOK(S) 1. Electronic Devices, 8th edition, Floyd; Prentice-Hall ISBN 0-13-242973-X 2. Lab Manual: Pearson Custom Electronics Technology EE362 ISBN -10 0-558-27304-1 ADDITIONAL REFERENCE(S)/BIBLIOGRAPHY 4 4 Electronic Devices And Circuit Theory - 4TH edition, BOYLESTAD, Robert and NASHELSKY, Louis; (Prentice-Hall) TK 7867.B66 1987 Electronic Devices 8th Edition, FLOYD, T.L.; 2002; TK 7870.F52
SUPPLIES: Safety glasses Protoboard Test Leads:
Four, 50 cm long with banana plugs at one end, alligator clips at the other. Two, 30 cm long with alligator clips at both ends.
TOOLS: Chain-nose pliers Side-cutters Wire strippers Slot-blade screwdriver
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B)
EVALUATION POLICIES AND PROCEDURES
GRADE EQUIVALENCIES: If on any test, assignment, projects, etc., a percentage or similar numerical grade is used, the following grade conversion system must be employed in arriving at the literal grade: 95 - 100 90 - 94 85 - 89 80 - 84 75 - 79 70 - 74 65 - 69 60 - 64 0 - 59 POLICIES & PROCEDURES: Department Policies 1. Whenever a course is taught during the same teaching term, i.e., Fall, Winter, Summer to different classes, common tests must be administered in the North Cafeteria (Fennell Campus). This Department will take strong measures against any student caught cheating, up to and including expulsion from the College. For more information refer to the section on Academic Dishonesty in your "Student Handbook". In order to continue to the next semester, all previous courses must be completed with no more than one outstanding failure. A+ A AB+ B BC+ C F EXCELLENT
GOOD
PASS FAIL
2.
3.
College Policies At the beginning of each semester, professors will clearly indicate to students, in writing, the process by which final course grades will be compiled, including the different weighting that will be placed on each test, assignments, etc., leading to the final course grade determination. Factors, which will influence "professional judgment", must be identified and their impact must be stated.
COMPUTATION OF FINAL GRADE, each student:
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In Lab Performance: Lab Reports: Lab Project:
40% (best 10 out of 11) 40% (alternate students A and B) 20%
Lab Attendance Policy Lab attendance is mandatory. Each lab is a learning module and due to the semester length and workload, the lab can't be repeated. If a student is absent, he/she will have missed a lab module and the student's grade will be calculated proportionally as indicated in the Computation of Final Grade section of this outline. Although labs missed due to illness and other extenuating circumstances are sometimes unavoidable, the professor may excuse the absenteeism if appropriate documentation is provided, and the student completes the lab missed on his/her own time, to the professor's satisfaction. C) COURSE CONTENT PRE-LAB ASSIGNMENT none EXPERIMENT NUMBER Lab intro. #2 #3 #4 #5 #6 #7 #8 #10 (optional) Week #10 - project
WEEK NUMBER 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
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11. 12. 13. marking
Week #11 - project Week #12 Project Test project test and final
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MOHAWK COLLEGE OF APPLIED ARTS & TECHNOLOGY Department of Electrotechnology
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INTRODUCTION TO LAB OBJECTIVE The student shall introduce himself to the safety procedures, expectations and equipment in the lab. PREPARATION There is no pre-lab for this module. EQUIPMENT There is no equipment required for this module. PROCEDURE The student shall familiarize himself with the following: 1. 2. 3. 4. 5. 6. 7. 8. 9. Safety in the lab and the use of safety glasses; Location of fire exits and meaning of fire alarm signals; Equipment handling and scope-lead storage; How to write a lab report and draw a voltage/time graph; Derivation of lab grade and lateness penalties; Preparation before coming to labs; Obtain a parts kit; Resistor and capacitor colour codes; Confirmation of kits contents.
INTRODUCTION TO LAB
OBJECTIVE
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The student shall introduce himself to the safety procedures, expectations and equipment in the lab. PREPARATION There is no pre-lab for this module. EQUIPMENT There is no equipment required for this module. PROCEDURE The student shall familiarize himself with the following: 1. 2. 3. 4. 5. 6. 7. 8. 9. Safety in the lab and the use of safety glasses; Location of fire exits and meaning of fire alarm signals; Equipment handling and scope-lead storage; How to write a lab report and draw a voltage/time graph; Derivation of lab grade and lateness penalties; Preparation before coming to labs; Obtain a parts kit; Resistor and capacitor colour codes; Confirmation of kits contents.
LABORATORY REPORT INSTRUCTIONS
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The following points will help you get better marks for your lab reports. Please read them before writing your reports. 1. General a) b) c) Do your memo in ink, including circuit diagrams, the graphs can be in ink or coloured pencils. Sheets for the workbook may be done in pencil. Do not rewrite the procedure, but use your words own for what you did. All diagrams and graphs must be suitably titled and scaled. A neat, well done graph is a good presentation of the results and can improve your grade. Show 2 or 3 cycles only.
2.
Equipment Numbers It is important that you record which instruments and equipment that you used in the experiment, showing type, make, model number and lab inventory numbers. Record these numbers at the start of the experiment, not just before you hand in your report.
3.
Pre-lab Pre-labs must be handed in at the beginning of each lab period. Required tables, graphs, etc., can be attached to the written portion. Do not rewrite the lab procedure, but do answer any pre-lab questions, perform specified calculations etc.
4.
Lab Memos Lab memos must contain: a) b) c) An introduction (1/2 page max.) Equipment list (data collected, as outlined in point 2 above) Discussion of results/summary - compare results to theory calculations as required in the pre-lab - state problems, possible causes and solutions - refer to your data answers to questions Raw data sheets from the workbook (attached)
d) e)
LABORATORY TEST
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OBJECTIVE The student shall demonstrate his/her abilities to use the equipment required in this course, particularly the use of the oscilloscope and resistor colour codes. EQUIPMENT Quantity 1 1 As required As required 1 1 1 PROCEDURE The test will be conducted as follows: FIRST HOUR One lab partner sets up equipment and performs the test. SECOND HOUR The other lab partner performs his/her test and returns the equipment. The instructor will provide a circuit diagram at the beginning of the test time. The student will hook up the circuit and measured values and waveforms will be recorded on the sheets provided at that time. At the end of the allotted 50 minutes, the student will hand in his/her paper for grading. These will be returned to the student 1-week later. Description Parts Kit Protoboard Test Leads Hook up wire DMM (maybe) VOM (maybe) Oscilloscope
WEEK #10 - POWER SUPPLY
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PRELAB 1.
(to be done separately by both partners)
Calculate the DC voltage and AC ripple in the power supply project across C1 if the load current is 400 mA.
EQUIPMENT POWER SUPPLY 12V transformer chassis oscilloscope DVM power decade box PROCEDURE A) Power Supply 1. 2. 3. 4. 5. 6. 7. Insert and solder 4 rectifier diodes D1 to D4, filter capacitor C1, series resistor R1 and the zener diode. Be sure C1 is in correctly (+ on top). Connect a power decade box set to 50 across C1 to act as a load on the rectifier. Connect "12 VAC" terminals to the 12V transformer chassis. Use the DVM to measure the DC voltage across C1 and the zener diode. Use the scope to measure the AC ripple voltage across C1 and across the zener diode. Repeat for decade box set to 100 and 200. Get the values for "VREG" and "ISC" for your group from the table. 0.5V Calculate RCL = ISC . Calculate values for 2 or 3 standard resistors in parallel to be within 1% of RCL. If 1 is needed, a 2W resistor is in the kit. If VREG is larger than the zener voltage (VZ), skip to 10.
8.
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POWER SUPPLY
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9.
If VREG is smaller than the zener voltage (VZ), calculate standard resistor values for R3 and R4 so that R3 + R4 is between 5K and 50K, and R4 xVZ is within 5% of VREG. R8 is not used, and R7 = 10K. Skip t R3 + R 4 to 11.
10. 11.
If VREG is larger than the Zener (VZ), calculate standard resistor values for R7 and R8 so that R7 is between 3K and 10K. Give your professor a written list of the resistors you need, and politely ask that they be available for you for next week.
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WEEK 11 - POWER SUPPLY POWER SUPPLY 1. 2. Use your DC voltage measurements to calculate the zener current. Calculate the power lost in the zener. Use the AC voltage measurements to calculate the AC zener current. Use the AC zener voltage to find the zener impedance. Compare this with the data sheet value. Use your DC voltage measurement to calculate the expected ripple voltage for R 1 of 50, 100, and 200. Compare lab data ripple voltage to the calculated, and estimate the actual capacitance of C1. If the heat-sinks data sheet shows a 40o temperature difference from 1.5W, and the thermal resistance from case to H.S. is about 1oC/W, what is the maximum wattage the transistor can handle? Before you ask, the transistors data sheet is in the course outline. Be sure to sketch the thermal circuit as the heat sinks are in parallel and between them is about 1o C/W
3.
4.
RCL .5V 2 ISC 3
GROUP RP
ISC 1
RP = parallel value of 1, 2 & 3 VREG V VZ R3 OR R7 R4 OR R8
V=
R 4VZ R3 + R 4
R8``VREG R8 + R7
OR
WEEK #11 - 12 POWER SUPPLY 1.
POWER SUPPLY
Connect the power decade resistance box (set at 10K) to VREG on your board, with the oscilloscope and DVM in parallel. Connect the 12V transformer chassis to the 12 VAC inputs. to keep the output transistor from overheating (the small heat sink provided can't dissipate full output power continuously) set the 10K decade switch to 1 while setting up the required R 1 and momentarily change to 0 for readings.
NOTE:
2.
To confirm the board is regulating, adjust R 1 from 10K to 5VREG/ISC. The output voltage should stay constant and VREG. Adjust R 1 to VREG/ISC (see above Note). The output voltage should decrease. Adjust R 1 to VREG/2ISC (note). The output voltage should be small. At R 1 = o, VL = OV. Record VL and R1 for resistance values from 10K to the point where V L has dropped in half. Measure 10 points between them so you can plot V L VS Il (IL on the horizontal). Measure the voltage across RCL when VL has dropped in half, and when IL = ISC. Set RL so IL is ISC/5. Record the DC voltages at VL, Vz and at both inputs of the op-amp. Use the scope to measure the AC voltage at C1, and V CC of the opamp, at the zener, and VO. Show your circuit working to your Professor and get the PCB initialed.
3.
4.
5.
REPORT Power Supply 1. 2. 3. Plot your data of VL and IL (IL on the horizontal). On the same graph plot VREG and ISG from the data table for your group. Use the zener DC voltage or load DC voltage and your resistor divider to compare to the DC voltages measured in procedure #4.
4. 5.
Compare the AC voltages measured in procedure #4 to those recorded in Module #2. Compare the voltage across RCL (procedure #3) to that used to calculate R L. What might be a better equation?