Principles to Computer Engineering
ENG_4_532:
Introduction
Introduction
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Mr Ya Bao (Semester 1)
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Office Hours
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Room T-701, Tower Block
email: baoyb@lsbu.ac.uk
Tel: 020 7815 7588
Mondays 15:00 – 16:00
Lecture notes
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www.lsbu.ac.uk/vle, or from your mylsbu
Text books (semester 1)
 Electric Circuits, Nilsson & Riedel, Prentice-Hall, 10E. 2015; ISBN:9781-292-06054-5
 Digital Electronics, Roger L. Tokheim, Mcgraw hill, 8E, 2014;
ISBN:978-1-259-06092-2
Overview
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Module Overview
Assessment Methods
Log books
Good practice in labs
Theory for Labs wk 2
Summary
Learning Outcomes
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Develop an understanding of the principles of circuit theory
and basic analogue electronics
Introduce the concept of digital systems
To develop your ability to manage and perform the successive
steps involved in typical practical engineering experiments
To develop your ability to work as a member of a team
To develop your ability to communicate technical information
(report writing)
Assessment Methods
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Course split 50% Semester 1 & 50% Semester 2
Phase Test: 20%
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Formal report: 20%
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Scheduled for 16/Nov/15; Week 8 in BR-232
Due by Week 13, submit to School Office (T313) by 13th Jan 2016
Logbooks: 10%
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Submit with reports to School Office by 13th Jan 2016
Lab Schedule
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Introduction to Lab Equipment
Voltage, Current, Power & Ohm’s Law
Kirchoff’s Laws of Current and Voltage (*)
Source Transformations
Wheatstone Bridge
Transformers and Rectifiers
Basic TTL Logic Circuits
Timing Circuits and Counters
RULES: While you are in the lab
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No drinking
No eating
No smoking
No dangerous activity
Take care with electrical devices
Switch off your mobile phone and ipod, distractions waste
time
Log Books (p7 of your lab manual)
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You MUST keep a log book! Do not use loose paper for
intermediate recording before transfer to the log book.
You must use the log book to document your procedure and
results AS YOU GO ALONG
Draw graphs only on graph paper, use pencil where needed
Answer all questions from the script in your log
Add ideas/points of interest too
Conclude each experiment with the key points
You MUST get your LOGBOOK stamped at the end of session
You MUST leave your logbook in the lab
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Go to stores J205 or good
stationers and buy a
suitable book with lined
paper and add graph
paper as needed
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Best logbooks are
Chartwell Laboratory
Books A4-641C
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Page number
Date
Names of the group
members
Title of the experiment
Brief description of the
procedure
Carefully record your results
Do NOT use ‘Tipp-Ex’
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Graphs should have a
caption
Make maximum use of
the graph paper
Choose an easy scale
Label the axes
Units
Error margins/bars
Error Margins
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You MUST estimate error margins for any reading you make
You should propagate these errors for any calculations you
make
Common measurement devices
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Oscilloscope ±3%
Digital Multimeter ±1%
Analogue Meter ±5%
The Breadboard Close-Up
Vertically
Connected
Break
Vertically
Connected
Horizontally
Connected
Break
Error Margins
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Common components
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Example logbook notation
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E12 Resistor ±5%
Electrolytic Capacitor ±20%
Digital Timer ±0.001%
1.00kΩ ±5%
56.2 s ±0.3s
Avoid quoting too many significant figures
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3 is usually about right
Resistor E series tables of values
Finally
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Please keep your Laboratory Manual safe!
Lab and lecture schedule on VLE
All related materials will be posted on VLE – check often
Please arrive promptly at 12:00 so we can start the lab on time
 Any questions?
Principles of Computer Engineering:
Experiment 1
Introduction to test equipment
Experiment 1
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Introduction to Breadboard
Build simple electrical circuits
Develop familiarity with Digital and Analogue Multimeters
Introduction to Oscilloscopes and Signal Generators
Building a Circuit on the Breadboard
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Push the component legs into suitably located sockets on
breadboard with care
Try to layout circuit neatly to look like that of the circuit
diagram
Double check circuit before connecting power (check polarity!)
Use colour coded wires where possible; red = +V, black = 0V,
blue = -V
Example Circuits to be Built
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The Lamp Circuit
Digital and Analogue Multimeters
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Can be used to accurately measure voltage and current in a
circuit
Have different characteristics – simple experiment to compare
them
DMM has an accuracy of around ±1%
Analogue MM accurate to around ±5%
Ideally have infinite internal resistance as acting as a voltmeter
Digital and Analogue Multimeters
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Use 1MW resistors in series with both Voltmeters to estimate
their input resistances
1 MW Resistor
+
PSU
-
+
1MW
Analogue
meter
V
IL
Meter
+
+
5V
Rx
V
m
Figure 2
Analogue meter in high impedance
5 volt circuit
Figure 4
Loading effects at 5 volts
The Oscilloscope
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Used to display time varying
waveforms
Apply sinusoidal signal from
generator at 1kHz
(Alternating current)
Measure frequency and
voltage with ‘scope facilities
Peak-to-Peak Voltage can be
measured
Vrms 
V pp
2 2
The Oscilloscope
Summary
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Become familiar with use of a breadboard
Build elementary circuits and test them
Use standard test bench equipment and appreciate their
accuracy
Introduce the use of oscilloscopes