DESIGN AND CONSTRUCTION OF A SOUND ACTIVATED SWITCH(2)
ABSTRACT
Clap/sound activated switch is an electronics device that can switch on & 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. Condenser Mic picks up sound vibrations caused by the clap. These sound vibrations are given to the microphone then to transistor amplifier, which amplifies the sound collected by the Mic. The amplified output pulses from the transistor amplifier passes to the trigger pin (pin 2) of the monostable multivibrator which produces an output (when someone clap) which is been controlled 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 through the second relay.
CHAPTER ONE
1.0 INTRODUCTION
1.1 PROJECT BACKGROUND
A circuited switch, which operates with sound of clapping hands or something similar; i.e. the switch comes to 'on' position when clapped once or twice, and to 'off' position when again clapped once or twice (depends on circuit design). A clap -switch circuit is a sound sensitive circuit.
The operation of the circuit is simple. Clap and the lamp turns on. Clap again and it turns off. The condenser microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. It produces a small electrical signal which is amplified by the succeeding transistor stage.
This circuit can switch on and off a light, a fan or a radio etc by the sound of a clap. Your clap should be loud; you can blow air from your mouth on the electric condenser to turn on the LED. This working of this circuit is based on amplifying nature of the transistor, switching nature of transistor, and relay as an electronic switch.
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 (Tokhiem, 1997).
- As a device used to connect two or more computers together (Horowitz, 1995).
- A device used to interrupt the flow of electrons in a circuit (Schuler, 1999).
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.
1.2 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.
1.3 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.
1.4 OBJECTIVE OF PROJECT
The objective of this project is to construct a device which can be switched on and off using clap signals.
1.5 SCOPE OF THE PROJECT
The scope of this work is defined by the following points,
I. The switching interface in this project is of the general purpose type as it is not restricted to only one type of load.
II. The clap signal accepted by the device, will not be limited to just one person.
III. It will not be limited to low voltage, low current AC/DC applications of 240V maximum operating voltage.
IV. 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;
I. Accidental switching of devices will be reduced to a minimum in our industries and homes.
II. Walking from point to point to switch ON/OFF 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.
IV. Our industries and homes will become friendlier to disabled people.
1.7 PROJECT WORK ORGANISATION
The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:
Chapter one of this work is on the introduction to this work. In this chapter, the background, significance, objective limitation and problem of this work were discussed.
Chapter two is on literature review of this work. In this chapter, all the literature pertaining to this work was reviewed.
Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.
Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.
Chapter five is on conclusion, recommendation and references.
This material is a complete and well researched project material strictly for academic purposes, which has been approved by different Lecturers from different higher institutions. We make abstract and chapter one visible for everyone.
All Project Topics on this site have complete 5(five) Chapters . Each Project Material include: Abstract + Introduction + etc + Literature Review + methodology + etc + Conclusion + Recommendation + References/Bibliography.
To "DOWNLOAD" the complete material on this particular topic above click "HERE"
Do you want our Bank Accounts? please click HERE
To view other related topics click HERE
To "SUMMIT" new topic(s), develop a new topic OR you did not see your topic on our site but want to confirm the availiability of your topic click HERE
Do you want us to research for your new topic? if yes, click "HERE"
Do you have any question concerning our post/services? click HERE for answers to your questions
You can also visit our facebook Page at fb.me/hyclas to view more our related construction (or design) pics
For more information contact us through Any of the following means:
Mobile No :+2348146561114 or +2347015391124 [Mr. Innocent]
Email address :engr4project@gmail.com
Watsapp No :+2348146561114
To View Our Design Pix: You can also visit our facebook Page at fb.me/hyclas for our design photos/pics.
IF YOU ARE SATISFIED WITH OUR SERVICES, PLEASE DO NOT FORGET TO INVITE YOUR FRIENDS AND COURSEMATES TO OUR PAGE.