electronic engineering final year project progress2

8/11/2019 Electronic Engineering Final Year Project Progress2

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Electronic Engineering

Final Year Project

Progress Presentation

Damien Higgins


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Topics of discussion

Introduction

Project Abstract

Project Stages

Progress to date

Project Plan Conclusion


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Introduction

Light chaser circuits can be used to createlighting animation sequences and have beenused in the past to attract attention for

advertising, promotion and in mobile discos. Light chaser circuits have been around for about

100 years. By the 1970s, integrated circuits andtransistors made light chaser circuits widelyavailable.

Wide variety of applications today.


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Project Abstract

The goal of my project is to build a set of analog

processing modules to capture an audio signal

and by analyzing this signal to drive a series of

multi-colored, high power LED lights.

The design will be used as a portable light chaser

and could be productized as a peripheral for a

portable music player.


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Stages of Project

This project can be broke down into different

Stages;

Sensor stage

Audio input amplifier stage

Processing the signal stage

LED driver stage

Power subsystem stage

Final stage


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Sensor Stage

Firstly some audio will need to be detected to

have something to work with

This could be done with some sort of sensor like

a microphone for example.

Extensive tests will have to be carried out to

determine which sensor will be the most

valuable for the purpose that we intend to use it

for.


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Audio Input Amplifier Stage

The signal got from the sensor will then needed

to be amplified somehow

To achieve this, extensive research and tests

should be carried out to determine what sort of

amplifier will be used.


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The signal obtained from audio input and sensor

stage will then need to be processed by a set of

filters

This is done to provide some sort of

information about the signal or the frequency

spectrum coming into the system


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LED Driver Stage

The unit should drive multiple banks of LEDs

It is desirable to use the information from the

signal processing circuitry to modify the output

pattern of the LEDs to flash to different

frequencies at different times


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Power Subsystem Stage

After all the stages are completed, the system

needs to have an efficient power supply using

battery power.


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Final Stage

At this stage all the modules should be brought

together into a single integrated design

It should also be at this stage that any

modifications take place


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Progress to Date

Light Chaser Circuits

Projects using LEDs

Research


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Sensor Stage

Extensive researched on a number of audio

sensors

5 different electret microphones to test

Constructed circuits to power and test eachmicrophone individually


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Audio Input Amplifier Stage

Reviewed a number of different amplifiers

Constructed a number of these amplifiers

After testing and evaluating each amplifier and

observing the results with the oscilloscope, anamplifier design was chosen


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Looked into processing the signal using a set of

analog filters

Tested a number of different filters

Frequencies we want are between 20 and 20,000hertz (typical for modern music)


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Project Plan

By the end of January I hope to have completed mostof the LED driver stage and have some sort of working

module completed.

For the month of February I plan to work on thePower subsystem stage.

In March I plan to tie up all loose ends with the projectand complete the Final stage.


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Conclusion

Thank you for your attention!

Questions?

electronic engineering final year project progress2

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