College of Micronesia
PO Box 159
Pohnpei, FM96941
Course title: Discrete Devices II
Department and Number: VEE222
Course Description: This course covers the construction and operation of various discrete
thyristor power control devices such as Diacs, Triacs, Silicon Controlled Rectifier (SCR),
Programmable Unijunction Transistor (PUT) and Unijunction Transitor (UJT) and their circuit
configurations.
Prepared by:
Dr. Nelchor T. Permitez
Hours/Week
No. Of Weeks
Lecture
3
x
16
Laboratory
x
Purpose of Course

State:
Total Hours
=
48
=
____
Degree Requirement
Degree Elective
Certificate
Other
Pohnpei Campus
Semester Credits
3_
__
Total Semester Credits
√
_
This course also meets PLO#(s): NA
Prerequisite Course: VEE 110
_______________________________________
Signature, Chairperson, Curriculum & Assessment Committee
_____________
Date Approved
_______________________________________
Signature, VPIA, COM-FSM
_________________
Date Approved
VEE222 DESCRETE DEVICES II
RECOMMENDED BY CAC: 11/28/11
APPROVED BY VPIA: 12/14/11
A. PROGRAM LEARNING OUTCOMES (PLOs):
The student will be able to:
1. Practice safety and occupational health procedures in the workplace.
2. Use electronics tools and test equipment competently.
3. Interpret schematic diagrams and waveforms.
4. Build electronics projects to a given specification.
B. STUDENT LEARNING OUTCOMES (SLOs) - GENERAL:
The student will be able to:
1. Describe the purpose and operation of Unijunction Transistor (UJT) and Silicon Controlled
Rectifier (SCR).
2. Describe UJT oscillator circuit operation.
3. Describe SCR trigger circuit operation.
4. Describe SCR power control operation
5. Identify the relationship among Triac, SCRs , Diac and four-layered devices.
6. Describe the construction, operation and application of Programmable Unijuction Transistor
(PUT).
SLO
1
2
3
4
5
6
PLO 1
I
I
I
I
I
I
PLO 2
DM
DM
DM
DM
DM
DM
PLO 3
D
D
D
D
D
D
PLO 4
DM
DM
DM
DM
DM
DM
I = Introduced
D = Demonstrated
M = Mastered
C. STUDENT LEARNING OUTCOMES (SLOs) - SPECIFIC:
The student will be able to:
General SLO 1: Describe the purpose and operation of Unijunction Transistor (UJT) and
Silicon Controlled Rectifier (SCR).
Student Learning Outcomes
Assessment Strategies
1.1 Describe the purpose of UJTs.
Competence will be demonstrated
through quizzes, written test and
1.2 Identify UJTs schematic symbol.
practical exam.
1.3 Describe the operating characteristics of UJTs.
1.4 Describe the purpose of SCR.
1.5 Identify SCRs schematic symbol.
1.6 Describe the SCRs rectifier operating characteristics.
General SLO 2: Describe UJT oscillator circuit.
Student Learning Outcomes
2.1 Describe the purpose of UJT.
VEE222 DESCRETE DEVICES II
Assessment Strategies
Competence will be demonstrated
RECOMMENDED BY CAC: 11/28/11
APPROVED BY VPIA: 12/14/11
2.2 Identify the schematic symbol of UJT.
2.3 Recognize UJT oscillator circuit.
2.4 Describe the operation of UJT oscillator.
2.5 Perform signal test and measurement on UJT
oscillator circuit.
2.6 Identify and describe the defective UJT oscillator
circuit.
through quizzes, written test and
practical exam.
General SLO 3: Describe the SCR trigger circuit operation.
Student Learning Outcomes
Assessment Strategies
3.1 Describe the purpose of SCR trigger circuit.
Competence will be demonstrated
3.2 Describe the SCR trigger circuits schematic diagram. through quizzes, written test and practical
exam.
3.3 Identify the SCR trigger circuit parts and operation.
3.4 Measure gate and anode current in an operating SCR
circuit.
3.5 Recognize the normal operation of SCR trigger
circuit.
3.6 Identify and describe the effect of defective SCR
trigger circuit.
General SLO 4: Describe SCR power control operation.
Student Learning Outcomes
4.1 Describe the purpose of SCR power control circuits.
4.2 Recognize SCR power control circuit.
4.3 Describe the operation of an SCR power control
circuit.
4.4 Recognize normal operation of SCR power control
circuit.
4.5 Measure the waveforms in an operating SCR control
circuit.
4.6 Identify the effect of the defective SCR control
circuit.
Assessment Strategies
Competence will be demonstrated
through quizzes, written test and
practical exam.
General SLO 5: Describe the relationship among Triac, SCRs, Diac and four-layer devices.
Student Learning Outcomes
Assessment Strategies
5.1 Describe the relationship between Traics and SCRs. Competence will be demonstrated
through quizzes, written test and
5.2 Recognize Triac circuit operation based on input
practical exam.
conditions.
5.3 Describe the relationship between Diacs and Four
layer Diodes.
5.4 State the advantages of using Diac with a Triac.
5.5 Observe the effect of AC and DC voltages with basic
Triac operation.
5.6 Describe the effect of triggering a Triac with an AC
waveform.
General SLO 6: Describe the construction, operation and application of programmable
VEE222 DESCRETE DEVICES II
RECOMMENDED BY CAC: 11/28/11
APPROVED BY VPIA: 12/14/11
unijunction transistor (PUT).
Student Learning Outcomes
6.1 Recognize the PUT schematic symbol.
6.2 Describe the construction of PUT devices.
6.3 Describe the operation of PUT devices.
6.4 Identify PUT devices application.
6.5 Perform PUT circuit signal test and measurement.
6.5 Describe the effect of defective PUT device in a
Circuit.
Assessment Strategies
Competence will be demonstrated
through quizzes, written test and practical
exam.
D. COURSE CONTENTS
I. Purpose and operation of UJT and SCR.
II. UJT oscillator circuit.
III. SCR trigger circuit operation.
IV. SCR power control operation.
V. Traic, SCRs, Diac and four-layer devices.
VI. PUT construction, operation and application.
E. METHODS OF INSTRUCTION
1. Computer Aided Instruction
2. Practical/Experimentation
3. Lecture/Demonstration
F. REQURIED TEXT(S) AND COURSE MATERIALS
Floyd, T. L. (2001). Electronics Devices. 5th edition. Upper Saddle River, NJ: Prentice Hall (or most
recent edition).
Toolbox and electronics circuit kit
G. REFERENCE MATERIALS
Nida Corporation. (2002). Unit III Analog Circuits. Melborne, FL: Nida Corporation Publishing (or
most recent edition).
H. INSTRUCTIONAL COSTS
None
I. EVALUATION
Student in electronics program must achieve a grade of "C" or better to pass the course.
J. CREDIT BY EXAMINATION
None
VEE222 DESCRETE DEVICES II
RECOMMENDED BY CAC: 11/28/11
APPROVED BY VPIA: 12/14/11