PROJECT REPORT LED AUDIO VISUALIZER

Purpose and Scope This document addresses the requirements related to the designing phase of the project.. We created a plan to finish the project on time which started with the Task Tab

HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY

SCHOOL OF ELECTRONICS AND TELECOMMUNICATIONS

PROJECT REPORT

Name of students:

Name of instructor:

Hanoi, Date

HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY

SCHOOL OF ELECTRONICS AND TELECOMMUNICATIONS

PROJECT REPORT

LED AUDIO VISUALIZER

Name of students: EEE – Class 58 – Team 7

Name of instructor:

Name of referee: ………

Hanoi, Date

Table of Contents

List of Figures iii

List of Tables iv

ACKNOWLEDGEMENT v

ABSTRACT vi

1 Introduction 1

1.1 Motivation 1

1.2 Purpose 1

2 Specification Requirements 1

2.1 Executive Summary 1

2.1.1 Project Overview 1

2.1.2 Purpose and Scope 1

2.2 Product Description 1

2.2.1 Product Context 1

2.2.2 Assumptions 2

2.2.3 Constraints 2

2.3 Requirements 2

2.3.1 Functional Requirements 2

2.3.2 Non-functional Requirements 2

3 Planning 3

3.1 Task Table 4

3.2 Human Resource Table 7

3.3 Gantt chart and Network Diagram 10

4 Block Designing 14

4.1 Audio Input and Amplifier 15

4.2 Filter 17

4.3 Display 19

4.4 Power Source 20

4.5 Schematic Diagram 21

5 Testing 21

5.1 Simulation 21

5.2 Breadboard 22

6 Manufacturing 22

6.1 PCB layout 22

6.2 Final Product 24

CONCLUSION 26

References 27 APPENDIX A - BILL OF MATERIALS A APPENDIX B – TRANSISTOR PN2222A DATASHEET C

List of Figures

Figure 2.1 Product's top view 3

Figure 2.2 Product's side view 3

Figure 3.1 Project's Gantt chart 11

Figure 3.2 Project's Network Diagram 12

Figure 4.1 Product's Block Diagram 13

Figure 4.2 Audio Input and Amplifier Block 13

Figure 4.3 3.5mm stereo jack and socket diagram 14

Figure 4.4 High-band Filter 15

Figure 4.5 Mid-band Filter 16

Figure 4.6 Low-band Filter 16

Figure 4.7 Filter Response 17

Figure 4.8 Display Block 17

Figure 4.9 Product's Schematic Diagram 18

Figure 5.1 Breadboard Prototype 19

Figure 5.2 Simulation on Proteus 19

Figure 6.1 PCB Top Layer 20

Figure 6.2 PCB Bottom Layer 21

Figure 6.3 Final Product 22

List of Tables

Table 3.1 Task Table 4

Table 3.2 Human Resource Table 7

Table 3.3 Resources Assigning Table 8

Table 4.1 Diodes Comparing Table 14

Table 4.2 NPN-transistor Comparing Table 15

Table 4.3 Power Source Comparing Table 18

In the age of the present information explosion, the applicability and the potential development of the advertising information are very big, the application of the new techniques is very necessary in this field

We really appreciate Dr xxx’s help with our project, and he created favorable conditions for our team to complete brilliantly this project

Although we made every effort, our ability is limited Moreover, this project is a new field for our team, so we should not avoid design errors in content and the method of presentation Our team is looking forward to Dr xxx’s guidance and your additional suggestion to improve this project

We would like to say thanks to everybody who helps us on this project!

As the demand for decoration increases so does the need for high performance and cheap price electric stuffs with LEDs The goal of this project is to design and build

a LED flashing circuit controlled by audio In this report, the design of the LED circuit to meet the specification is explained The circuit does not involve microcontrollers for simplicity The circuit was built using the Proteus ISIS as a CAD tool The design of the LED flasher was simulated in Proteus to verify its performance Then the circuit was tested on the breadboard In most cases, the objectives of the project were met However, there should be some recommendations for further research and work

1 Introduction 1.1 Motivation

We choose this project because of some reasons:

- People usually forgot to switch the light off when we don’t use it anymore and cause electricity wasting

- Sometimes, people don’t turn the light on due to lazyness and work under dark enviroment

Therefore we see that it is necessary to make an smart lamp that can turn on/off

automatically to reduce energy wasting and provide sufficient light for the eye

1.2 Purpose

- Understand 9 steps in the designing process

- Know how to use several electrical equipment, and designing software

- Build a well-performed Automatic night light with low price

2 Specification Requirements 2.1 Executive Summary

2.1.1 Project Overview

The LED lamp which can automatically regulate the brightness depending on the light level

2.1.2 Purpose and Scope

This document addresses the requirements related to the designing phase of the project

2.2 Product Description

2.2.1 Product Context

The product is independent and self-contained It is not related to any other products

or larger systems

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2.3 Requirements

2.3.1 Functional Requirements

- The product must have two modes:

+ Manual switching

+ Automatic: using photoresistor

- The product must have a tuning in order to adjust the brightness of the LEDs

- The product should be powered by an AC/DC adapter

2.3.2 Non-functional Requirements

2.3.2.1 Performance

2.3.2.2

2.3.2.3 Hardware Platform

- Light emitting diodes (LEDs):

Voltage: 12V

2.3.2.4 Appearance

- Like a normal lamp

- Weight: less than 300g

2.3.2.5 Power Consumption

- Power Supply: DC-12V/2A

- Power Consumption: 20W

2.3.2.6 Development Time

About 9 weeks

2.3.2.7 Development Cost

Less than VND 500,000

2

3 Planning

The next phase in the project is developing plan We created a plan to finish the project on time which started with the Task Table and the Human Resource Table

3

3.1 Task Table

Our project consists of 4 tasks In some tasks, there are sub-tasks Each task has its own deliverables The project starts on December 6 , and ends on January 30 th th

Table 3.1 Task Table

Task ID Task Name Duration Start Date End Date Dependencie

#1

Learning the

basic

principle of

each

component

3 weeks December 6 th December 26th

Understanding of how the product is made and have the requirement knowledge to make the product

The

appearance of

the lamp

2 weeks December 6 th December 19th Have an idea of how

the product looks like

Hardware 3 weeks December 6 th December 26th

Know about the electronics component to make the product

4

Software 2 weeks December 6 th December 19th Programs to make the

product works

#2

Drawing the

principle and

block

diagrams

2 weeks December 13th December 26th Block diagram and

principle diagram Principle

diagram 2 weeks December 13

th December 26th Principle diagram Block

diragram 2 weeks December 13

th December 26th

Block diagram

#3 Making the

first model 4 weeks December 27

th January 23rd #1 #2 First model

#3.1 Preparation 1 week December 27th January 2nd

Buying

electronic

devices

1 week December 27th January 2nd Checking the

application in

need

1 week December 27th January 2nd

#3.2 Construct a

prototype 3 weeks January 3

rd January 23rd #3.1

Power supply 3 weeks January 3 rd January 23 rd

5

Connect

electronic

devices onto

the circuit

board

3 weeks January 3 rd January 23 rd

Checking

software

together

through

TeamViewer

3 weeks January 3 rd January 23 rd

#3.3 Designing the

slide 3 weeks January 3

rd January 23rd Slides

#4 Testing and

fixing 1 week January 24

th January 30th #3 Final product

2.4 Human Resource Table

Our team has 4 members Each one has different strength and weakness The following table will help us on assigning resources to tasks for maximum productivity

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Table 3.2 Human Resource Table

#1 Pham Manh Tuan - Leading skill

- Electrical components

- Programming language C/C++

Weekdays

#2 Pham Xuan Viet - Drawing

- Searching skill

- Note-taking skill

- Programing

- Electronics

Weekdays

#3 Nguyen Pham Anh

Tuan

- Presentation skill

- English skills

- Programing

- Circuit design

Weekdays

#4 Nguyen Duc Vinh - Microsoft

Powerpoint

- Enthusiasm

- Presentation skill

Weekdays

Then the team members are assigned to the tasks

Table 3.3 Resources Assigning Table

#1 Learning the basic principle of each component All members

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The appearance of the lamp Nguyen Duc Vinh

Hardware Pham Manh Tuan, Nguyen Pham Anh Tuan

#2 Drawing the principle and block diagram All members

#3 Making the first model All members

Buying the Electronic devices Pham Manh Tuan, Nguyen Pham Anh Tuan Checking the application in need Pham Xuan Viet, Nguyen Duc Vinh

#3.2 Construct a prototype All members

Power supply Pham Manh Tuan, Nguyen Pham Anh Tuan Connecting the electronic devices onto the circuit

board

Pham Manh Tuan, Nguyen Pham Anh Tuan Checking the software together through

TeamViewer

Pham Xuan Viet

#3.3 Designing the slide Nguyen Duc Vinh

8

2.5 Gantt chart and Network Diagram

We have scheduled and managing our project around this gantt chart

9

10

4 Block Designing

The next phase of our project is designing the product We made a block diagram of the product

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Figure 4.2 Product's Block Diagram

After having the block design, we make the detailed design of each block.[2]

4.2 Principle Diagram

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4.1 Display

In this part, a light bulb will be the main component which is then powered by

adapter and controlled by Arduino There are various options to choose so after

doing calculations, we have come to the conclusion of using 12V LED bulb

LED Bulb

Criteria (weight)

Muy (µ) Price

(0.3)

Reliability (0.3)

Brightness (0.2)

Lifespan (0.2)

12V led bulb 0,8 (0,8) 4,7(0,94) 630(0,63) 35000(0,71) 0,574

120V led bulb 3,75 (0,375) 4,5(0,96) 400(1) 30000(0,83) 0,75

120V Sengled

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4.2 Sensor

For this part, we use a regular Light-dependent resistor as a component to detect the intensity of light from environment The first pin of the resistor is connected to pin A0 of arduino and it is also joined by 5V power wire in serial with 1k ohm resistor The left pin is connected to the GND pin of Arduino and relay

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4.3 Power source

The 12v adapter power the light bulb have been selected based on the light bulb speculation and some calculations as well

Power Source

Criteria (weight)

Muy (µ) Voltage

(0.4)

Reliability (0.3)

Price (0.3)

12V cell 12(0,25) 4.6(0,91) 22(1) 0.673

48V Adapter 48(1) 4.2(1) 17(0,78) 0.934

12V Adapter 12(0,25) 4.3(0,98) 6.95(0,32) 0.49

To power the sensor and Arduino, we use 5V passed through cable connected to laptops or other similar external source

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