Electrical Services Design: EEE 314

EEE 314: Level 3, Term 1. Section: A1, A2.

(Semester: August, 2011)

Quick Links and Downloads:

Download lab documents (PDF)

Project report received list: Download

Study materials:

Electrical grounding:

Download PDF 1 Download PDF 2

Project 1: Acoustic performance of a class room

Submission deadline: 26th November, 2011.

A single report from A1 and a single report from A2 must be submitted.

Project Status:

Section A1: Report received. Performance: Satisfactory.

Section A2: Report received. Performance: Satisfactory.

Submit the report in PDF form through email. Highlight the data collection methods, hardware and software used, post-processing (data analysis), results, result analysis and conclusions reached from the data.

The contour graphs should be in emf format. All figures and graphs should be clearly labeled. The axis of the graphs should have proper labeling and units.

Contour plotting from measured data using MATLAB:

An example problem is provided describing how MATLAB can be used to draw contour plots from measured tabulated data. The problem description along with data files and MATLAB codes are available for download.

Problem description: Download PDF

Data files and MATLAB code (*.xls, *.csv, *.m): Download

Students are encouraged to learn this technique. They will need similar calculations when describing acoustical characteristics of a room (volume level, noise level, reverberation time etc. can be expressed in similar contour plots using the same technique).

Project 2: Designing an LED strobe light using 555 Timer IC:

3 groups from A1 and 3 groups from A2 must submit this project. No written report of the project is required. Students must submit a video demonstration of their project (video duration : 1 - 2 minutes).

Students must show three applications with their strobe light:

1. Freezing or slowing down water droplets.


2. Freezing a fan with a strobe light and measuring its speed.


3. Increasing visibility through smoke using strobe lights.

Hints and instructions related to strobe light project has been uploaded: Download PDF

Simulation schematic files of 555 timer circuits are available for download:

Download 555 Astable multivibrator circuit schematic

Download Modified 555 Astable multivibrator circuit schematic

Note that you need LT Spice IV software to run these schematic files. The free software can be downloaded from the following website:


The software is very easy to use. Users guide and getting started guide are available on the download page of the software.

Students can find additional information related to 555 Timer IC circuits in the following websites:



Students are also advised to check the data-sheet of 555 timer and ULN darlington buffer.

Datasheet of 555 Timer

Datasheet of ULN darlington buffer

Data-sheets of other 555 timer IC models can be downloaded from the internet. Websites like http://www.datasheet4u.net/ provides free data-sheets.

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This page was last updated on: 2nd February, 2012.