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Design And Construction Of A Clap Activated Switch

Electrical Electronics Engineering | Industrial Physics | Physics

The design and construction of a clap-activated switch involve creating an innovative electronic circuit that responds to sound signals, specifically clapping, to toggle electrical devices on or off. This ingenious device combines elements of acoustics and electronics, utilizing a sensitive microphone to detect the distinct sound pattern generated by clapping. The key components include a microphone, amplifier, filter, and a switching mechanism. The microphone captures the acoustic signals produced by clapping, sending them to the amplifier, which enhances the signal strength. A filter is then employed to isolate and recognize the unique clap pattern from other ambient noises. The switching mechanism, often a relay or transistor, is triggered by the identified clap, allowing for the control of connected devices. This hands-free technology finds practical applications in home automation and convenience, offering an intuitive and responsive alternative for activating various electrical appliances.

Clap activated switch is an electronics device that can switch on and off a light, Fan, Radio or any other appliance by the sound of clap. This is the system of a very sensitive clap switch. It switches ON/OFF a White LED or electrical appliances through claps. The circuit can sense the sound of claps from a distance of 1-2 meters. Condenser Mic picks up sound vibrations caused by the clap. These sound vibrations are given to the transistor amplifier, it amplifies the sound collected by the Mic.

The amplified output pulses from IC1 passes to the trigger pin of the monostable multvibrator which produces an output which is been controlled by the first relay. The relay is wired to control the trigger switch of the alternating ON-OFF switch and the output of the alternating ON-OFF switch is wired to control the ac lamp.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

1.0 INTRODUCTION

1.1 BACKGROUND OF THE PROJECT

PROBLEM STATEMENT
PROJECT MOTIVATION
AIM / OBJECTIVE OF THE PROJECT
SCOPE OF THE PROJECT
SIGNIFICANCE OF THE PROJECT
APPLICATION OF THE PROJECT
METHODOLOGY
PROJECT ORGANISATION

CHAPTER TWO

LITERATURE REVIEW

REVIEW OF VOICE COMMAND DEVICE
OVERVIEW OF CLAPPING
REVIEW OF MAJOR COMPONENTS USED

CHAPTER THREE

3.0 CONSTRUCTION METHODOLOGY

3.1 BLOCK DIAGRAM

3.3 CIRCUIT DIAGRAM

3.4 SYSTEM OPERATION

3.5 CIRCUIT DESCRIPTION

3.6 COMPONENTS LIST

CHAPTER FOUR

TEST AND RESULT ANALYSIS

CONSTRUCTION PROCEDURE
CASING AND PACKAGING
TESTING OF SYSTEM OPERATION
CONSTRUCTION TESTING PROCEDURE
MAINTENANCE OF THE SYSTEM

CHAPTER FIVE

5.0 CONCLUSION, RECOMMENDATION AND REFERENCES

CONCLUSION
RECOMMENDATION
REFERENCES

CHAPTER ONE

1.0 INTRODUCTION

PROJECT BACKGROUND

In the present modern world, switching circuits have become an indispensible part of our life. Right from your mobile phone to the various security systems, they can be seen everywhere. Even the horn of your motor car is a kind of switch used to warn people and vehicles in front of its presence. The sole purpose of a switch is to activate or deactivate a device. They may be in the form of a visual indicator, for example a flashing light, but switching circuit in the form of an audible tone or siren is more widely accepted as it is able to wake up even the unaware and the oblivious.

This work is on sound activated switch. Clap activation or deactivation switching is all about automating real life devices using clap signals.

The word “switch” is a very common name found in almost all aspects electrical/electronic engineering. Switches can be found in information technology computers, telecommunications, power electronics, power systems, instrumentation etc.

They have been defined by various people or organizations in different ways. Some of the definitions of switches are listed below;

As a device that is used to break or stop the flow of charges in a circuit.
As a device used to connect two or more computers together

A device used to interrupt the flow of electrons in a circuit.

All the above definitions are correct, but for this project we are going to define a switch as a device which can be used to control the action of an electrical load, by allowing or obstructing the flow of the electrical signal sent it.

STATEMENT OF THE PROBLEM

In the industries like the petroleum or chemical industries, some production processes have been started or stopped due to accidental switching of machinery leading to injury or death. This can cause financial strain on a company.
In the radioactive process, manual switching poses great health hazards to the operator due to the side effects of exposure to the radioactive elements.

Manual switching is an uphill task for the disabled and the aged due to movement constraints.

Sometimes, we are victims of electric shocks from our devices when we try to switch them ON/OFF due to leaking currents from the electric switches.
- PROJECT MOTIVATION

The motivation of this project is to fulfil the following;

To eliminate the stress in walking from end to end, or room to room of a building to switch devices ON/OFF.
The provision of remote switching helps to safe guard operators and equipment.
To ensure a reliable and safe method of switching domestic and industrial devices.

OBJECTIVE OF STUDY

The objective of this project is to construct a device which switches on and off using clap signals.

1.5 SCOPE OF THE PROJECT

The scope of this work is defined by the following points

The switching interface in this project is of the general purpose type as it is not restricted to only one type of load.
The clap signal accepted by the computer, will not be limited to just one person.

It will not be limited to low voltage, low current AC/DC applications of 240V maximum operating voltage.

The type of control this project employs is the simple ON/OFF control of devices

1.6 SIGNIFICANCE OF PROJECT

This project’s completion will be of great benefit to our ever demanding and developing society. Some of these benefits include;

Accidental switching of devices will be reduced to a minimum in our industries and homes.
Walking from point to point to switch switches will be a thing of the past.

III. This project will possess the LOCK and UNLOCK functions, which will prevent unintentional switching during conversation.

Our industries and homes will become friendlier to disabled people.

1.7 APPLICATION OF THE PROJECT

The major advantage of a clap switch is that you can turn something (e.g a lamp) on and off from any location in the room (e.g while lying in bed) simply by clapping your hands. A clap switch is generally used for a light, television, radio or similar electronic device that the person will want to turn on/off from bed.

1.8 METHODOLOGY

To achieve the aim and objectives of this work, the following are the steps involved:

Study of the previous work on the project so as to improve it efficiency.
Draw a block diagram.

Test for continuity of components and devices,

Design and calculation for the device was carried out.
Studying of various component used in circuit.
Construction of the circuit was carried out.

Finally, the whole device was cased and final test was carried out.

1.9 PROJECT ORGANISATION

The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.