introduction dr s. worrall - university of...

Introduction

Dr S. Worrall

04/10/2010 1http://info.ee.surrey.ac.uk/Teaching/Courses/ee2.laba/

Today▪ 10am: Labs Intro and Safety

Most material available online http://info.ee.surrey.ac.uk/Teaching/Courses/ee2.laba/

▪ Project Forms

▪ Safety Forms

▪ Timetables

▪ Group Lists

▪ Experiment Details


http://info.ee.surrey.ac.uk/Teaching/Courses/ee2.laba/

Safety Experiments Project Work Lab Books and Assessment Finding the labs


Details repeated in lab book ESSENTIAL:

You must read safety notes and sign form to say you have read it



• Use of computers Class A

• Low-voltage open wire experiments Class B

• Open mains and high-voltage Class C

• 3-phase electrical and rotating machines Class D

• Hazardous materials and chemicals Class E

• Chemical hazards and tools Class F

• Radiation such as microwaves, X-rays, etc.Class G

1. No student may work in the laboratory without the supervision of an academic member of staff. At the end of the timetabled classes all students must leave promptly and may not stay behind.

2. If in doubt about any equipment or procedure, ask for help.

3. Any incident involving any person or piece of equipment, however trivial, must be reported immediately to a supervisor or technician.


4. Never run in laboratories under any circumstances

5. Turn soldering irons off when not in use, and keep cables, books, papers, clothes well away from them

6. Be aware of the location of safety information and equipment such as fire extinguishers, emergency meeting places, eye baths, emergency notices, etc.


7. Never block aisles or doorways with bags or equipment. Also, do not leave bags and clothing on work benches where the equipment and tools and soldering irons may cause an unnecessary hazard.

8. Do not eat or drink during laboratory classes. If you need food because, for example, you are breaking a fast or you are diabetic, please simply ask a demonstrator for permission to leave the laboratory briefly.


Working Hours are 10am – 12.50pm 2pm – 4.50pm

Prompt arrival is required in case any announcements are made or hand outs are distributed.

Leave promptly after 12.50 so that demonstrators can have a lunch break You cannot remain in the lab

without supervision.


InstructionsE

E

EC

E Media Eng

PERL and CGI Web X C Xe and p Web C C XOp Amps Manual C C CPulses and Bandwidth Manual C X XProject (6 weeks) Manual C C CSPICE Manual C C XDigital Audio Synth. (2 weeks) Web X X CMicrophone Response Web X X C

C: Compulsory X: Not Available


Find your lab group number Use timetable to see what experiment you are

doing each week Split into groups of 2-3 for: Op Amps Pulses and Bandwidth E and pi Digital Audio Synth. And Mic. Response

Perform individually: Perl and CGI Spice


SURNAME FORNAME COURSE

LAB

GROUP

LAIOS KONSTANTINOS ECE 1

PARARAJASINGHAM GNANAKUMARAN ECE 1

KASIBANTE LYDIA ECE 1

PAIVA MARTINS DE MORAIS ANA ECE 1

RAJAPAKSHA DUSHMANTHA ECE 1

RATNAYAKA

MUDIYANSELAGE VAJIRA ECE 1

CHISHOLM CRAIG EE 2

OWENS NATHAN EE 2


Week 1 2 3 4 5 6 7 8 9 10 11 12e and pi

Rea

din

g W

eek

3 4 1 2 -Op Amps 1 3 2 4 5 -Pulses and Bandwidth

2 3 4

Project 235 145 145 235 234 12345

14 12 23 1345

Marking

12345

PERL 1 -Spice 4 2 3 1 -Digital Audio Synthesis

5 5 -

Mic. Freq. Response

5 -


Is your name on list?

Contact me if not

What course are you doing?

Elec Eng or ECE?

Affects experiments you will carry out

All ECE students are in group 1

If there is an error

E-mail me with your tutor group letter and your course type


Within each lab group divide yourselves into teams of 3-5

Choose a project type Fill in project choice form with team member names

and project choice Print out form from lab web page

Should have made a reasonable start in terms of project planning by the end of the first project day


ID

Task Name

(Person

Responsible)

Start Finish Duration

Sep 2008 Oct 2008 Nov 2008

7/9 14/9 21/9 28/9 5/10 12/10 19/10 26/10 2/11 9/11 16/11 23/11

1 2w19/09/200808/09/2008Plan Project (all)

2 4.8w16/10/200815/09/2008Task X (Bob)

3 2.4w06/10/200819/09/2008Task Y (Jack,

Anna)

4 4w20/10/200823/09/2008Task Z

(Muhammad)

5 3w04/11/200815/10/2008Task 5

6 2w24/10/200813/10/2008Task 6

7 1.8w31/10/200821/10/2008Task 7

8 2w13/11/200831/10/2008Task 8

9 3w25/11/200805/11/2008Testing

10 2w02/12/200819/11/2008Report Writing


Build a stereo amplifier for an MP3 player

Drive a pair of small loudspeakers at an audible level from the headphone socket

Should run on 3 AA batteries

Use components available in the lab


Design in 3 stages

Stage 1: Pre-amp and output stage

Pre-amp: Op-amps

Output Stage: Transistors


Pre-AmpOutput

Stage

Stage 2: Add a tone control

Low pass and high pass filter is ok


Tone

ControlPre-Amp

Output

Stage

Stage 3: Bridge Amplifier


Bridge Amplifier

Output

Stage

(Inverted)

Tone

ControlPre-Amp

Output

Stage

Need to find out

Class of amplifier to use

Example circuits?

▪ Links on lab web page

▪ Electronic Devices, by Floyd

▪ Should be many books in the library


Build a battery-powered electronic doorbell

Play a tune at an audible level

Use components available in the lab

A "PIC" Development Board is programmed for this project

Use assembly language to programme PIC

▪ C programming of PICs is not supported

Manuals/books available in lab office


List of available components provided in the lab

You are not permitted to order specialist components

Audio power amplifier modules

Etc.


Add team member

names Don’t worry

about group

code


Project specification Project plan Preliminary design

schematic diagrams

circuit descriptions

mechanical sketches


Documentation package

▪ final schematic diagrams

▪ printed circuit layout ( if applicable)

▪ mechanical drawings

▪ assembly drawings

▪ parts list

▪ test at specification

▪ operating manual

Finished prototype


One marking session Final week (100% marks)

Demonstrators keep logs on student attendance Make sure you have been included at the end of each

lab session Consistent absence may result in project marks being

zeroed 6 weeks of project work (interspersed with

experiments) FINAL WEEK is for presentations and assessment

of the report


Final week

Documentation: project report

Log book keeping

Circuit functionality

▪ Features

▪ Quality

▪ Does it work?


Make sure you are marked as present for each session Should talk with demonstrators at the end of the session They will mark your name on their project logs

MAY GET LOWER PROJECT MARK IF “ABSENT” Notify academic if you will work outside lab Come to lab, tell academic


Non-project assessment Assessment performed by demonstrator during

session

Marked on:▪ Preparation

▪ May be asked questions

▪ Should learn theory, not just produce a “pretty” write-up of the background

▪ Lab Performance▪ Includes log book quality mark


Preparation marked at the start of the session Required to write in your lab book BEFORE THE LAB

A summary of relevant theory

Sample calculations

Expected results

Any design work asked for in the experiment



Lab Perf. Mark

Ability

Under-standing

Effort made

Progress made

Log book quality

An accurate and detailed record of what happened so that the experiment could be exactly repeated by another person at a later date.

Log book quality Tidiness

Quality of results

Conclusions drawn

Proper documentation of the experimental set-up


Part 1: Preparation Date* Summary of relevant theory* Summary of experiment methodology* Prediction of results based on theory* Calculations using expected values Description of what would be seen during experiment Sketches of expected graphs Sketches of expected oscilloscope waveforms Diagrams of any circuits required for the experiment


Part 2: Experimental Work

Date*

List of equipment*

Serial numbers of equipment*

Any other relevant environmental parameters

Labelled diagram of set-up, showing connections (very valuable)

Note of what was done (method)*

Note of what went wrong and was changed*


Comments on method*

Comments on measured and calculated values

Comments on possible errors and uncertainties on measured values

Graphs: titled with labelled axes

Tables: titled with SI units

Conclusions on results, method, value of experiment* (what engineers actually get paid for)

No Conclusions => Cannot get a higher

grade than D!04/10/2010 37http://info.ee.surrey.ac.uk/Teaching/Courses/ee2.laba/


S* Outstanding

S ExcellentA Very Good

B GoodC

SatisfactoryD Poor

E Fail

NOTE: All experiments are held in

Elec Eng UG laboratories

But check lab web page and e-mail for any last minute changes!


04/10/2010 46

Main Second Year Lab

- E and pi

- Lab Project

- Labview

- Perl and CGI

Lab

OfficeStore

Tels Lab

- Spice

Media Eng Labs

- Microphone Response

- Audio Analysis

RF Lab

Stores

First Year Lab

Brid

ge

To

BB

Expectations Knowledge of experiment

▪ Should be able to answer most common questions▪ If they don’t know, they should try and find out

Should be helpful▪ Should regularly check how you are doing

Marking▪ Should receive some feedback so that you can improve next

week

Please contact me if you think that the above expectations are not met


Common complaints

“Demonstrator X gives higher marks than Demonstrator Y”

▪ Marks are moderated▪ E.g. Tuesday vs. Friday marks

“My mark is lower than expected”

▪ All module marks are subject to moderation at examiners meetings

▪ Moderation consistently applied to all students


All messages/enquiries to:

[email protected]

[email protected]

Labs will be coordinated by Dr Wang Put ‘LABS’ in the title


mailto:[email protected]

mailto:[email protected]

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