TABLE OF CONTENT Certificate ..iAcknowledgement..iiAbstract .iiiCHAPTER 1: INTRODUCTION TO PROJECT1.1 Brief Description of Project..........................................................21.2 Scope of project.21.2 List of Applications........................................................................2CHAPTER 2: PROJECT DETAILS2.1 Detailed Description of the Project..............................62.2 Working principle with the help of circuit diagram.......6CHAPTER 3: METHODOLOGY3.1 Process followed ......................................................153.2 Programming..............................................................16CHAPTER 4: TESTING AND VALIDATION OF RESULT.20CHAPTER 5: FUTURE SCOPE...............................................................21CHAPTER 6: CONCLUSION.................................................................22

REFERENCAPPENDIX

CHAPTER 1:INTRODUCTION TO PROJECT1.1 Brief Description of Project This is an interesting idea in which a message is displayed on an LCD screen whenever a sound is produced. The message remains on LCD for a short duration of time and then disappears. This topic demonstrates the interfacing of a sound operated circuit and LCD display with the pic microcontroller (16f73). The circuit can be used to display welcome message at entrance; or warning messages at public places. It can also be used to aid communication for deaf and dumb people.

1.2 Scope of Project

In a future we can modify sound activated massage display as sound operated massage display a what we are saying that all are display on the lcd screen by advancing and connecting it sound module and memory in the present circuit of project.This can be help in to produce smart notice board at school, collage, railway station, hospital etc. where the immediate announcement are required after very small interval of time.

1.3 List of ApplicationsThis system has various following applicationa. Used to display welcome massage at entrance.b. Warning massage at public place.c. It can also be used to aid communication for deaf and dumb people.

CHAPTER 2: PROJECT DETAILS

2.1 Detailed Description of the ProjectIt is LCD sound activated display using pic microcontroller (16f73) in which we use microphone to sense any type of sound and the massage is display on the lcd screen.The message remains on LCD for a short duration of time and then disappears..

2.2 Working principle with the help of circuit diagram

The circuit consists of four major modules, namely, a sound sensor, an amplifying circuit, a control circuit and a display module. A switching circuit is also employed after the amplifier.Any sound, say clap, is detected by a microphone (condenser mic) which acts as the sound sensor. This mic is connected to a two stage transistor amplifier. The mic output is thus amplified to a suitable level so that it can be detected at the TTL logic.

The output of the amplifier is coupled with a transistor switch. Whenever a high voltage output is received from the amplifier, it generates a pulse. The transistor switching circuit also ensures that a high TTL logic is not received at the microcontroller due to noise signals.

The pulses, from the switching circuit, are fed to the microcontroller 16f73's pin which is programmed to detect the pulses. Whenever a high pulse at microcontroller input is detected, a message MAHARISHI MARKENDESHWAR UNIVERSITY is sent to a 16x2 LCD. The message remains on the LCD display for a short duration after which it is cleared again. The message is repeated whenever a high pulse (due to clap sound) is received by the controller.

The data pins of the LCD are connected to port P2, while the control pins (RS, R/W & EN) are connected to pins 1-3 of port P1, respectively. The microcontroller receives sound pulses through the first pin of port P0.

Block diagram

Power Supply Circuit:-

Apower supplyis an electronic device that supplieselectric energyto anelectrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to aselectric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found indesktop computersandconsumer electronicsdevices.Every power supply must obtain the energy it supplies to its load, as well as any energy it consumes while performing that task, from an energy source. Depending on its design, a power supply may obtain energy from various types of energy sources, including electrical energy transmission systems

Transformer:-

Electricalpower transformeris a static device which transforms electrical energy from one circuit to another without any direct electrical connection and with the help ofmutual inductionbetween two windings. It transforms power from one circuit to another without changing its frequency but may be in different voltagelevel.1. Bridge Rectifier:-

The four diodes labelledD1toD4are arranged in series pairs with only two diodes conducting current during each half cycle. During the positive half cycle of the supply, diodesD1andD2conduct in series while diodesD3andD4are reverse biased and the current flows through the load.

Capacitor:-

Acapacitor(originally known as acondenser) is apassivetwo-terminalelectrical componentused to storeenergyelectrostaticallyin anelectric field. The forms of practical capacitors vary widely, but all contain at least twoelectrical conductors(plates) separated by adielectric(i.e.insulator). The conductors can be thin films of metal, aluminum foil or disks, etc. The "nonconducting" dielectric acts to increase the capacitor's charge capacity. A dielectric can be glass, ceramic, plastic film, air, paper, mica, etc. Capacitors are widely used as parts ofelectrical circuitsin many common electrical devices. Unlike aresistor, an ideal capacitor does not dissipate energy. Instead, a capacitor storesenergyin the form of anelectrostatic fieldbetween its plates.

Resistor:-

The electrical resistance of a circuit component or device is defined as the ratio of thevoltage applied to theelectric current which flows through it. If the resistance is constant over a considerable range of voltage, thenOhm's law, I = V/R, can be used to predict the behavior of the material. Although the definition above involves DC current and voltage, the same definition holds for theAC applicationof resistors.

Voltage Regulator:-

Avoltage regulatoris designed to automatically maintain aconstant voltagelevel. A voltage regulator may be a simple "feed-forward" design or may includenegative feedbackcontrol loops. It may use an electromechanicalmechanism, or electronic components. Depending on the design, it may be used to regulate one or moreACorDCvoltages.Electronic voltage regulators are found in devices such as computerpower supplieswhere they stabilize the DC voltages used by the processor and other elements. In automobilealternatorsand centralpower stationgenerator plants, voltage regulators control the output of the plant. In anelectric power distributionsystem, voltage regulators may be installed at a substation or along distribution lines so that all customers receive steady voltage independent of how much power is drawn from the line.

Led:-

Alight-emitting diode(LED) is a two-leadsemiconductorlight source. It is a basicpn-junctiondiode, which emits light when activated.[7]When a fitting voltage is applied to the leads,electronsare able to recombine withelectron holeswithin the device, releasing energy in the form ofphotons. This effect is calledelectroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energyband gapof the semiconductor.An LED is often small in area (less than 1mm2) and integrated optical components may be used to shape itsradiation pattern.INTERFACING DIAGRAM OF LCD WITH 16f73

A 16x2 LCD means it can display 16 characters per line and there are 2 such lines. In this LCD each character is displayed in 5x7 pixel matrix. This LCD has two registers.1. Command/Instruction Register - stores the command instructions given to the LCD. A command is an instruction given to LCD to do a predefined task like initializing, clearing the screen, setting the cursor position, controlling display etc.2. Data Register - stores the data to be displayed on the LCD. The data is the ASCII value of the character to be displayed on the LCD.

PIC 16F73

fig :- 16f73/72

PICis a family ofmodified Harvard architecturemicrocontrollersmade byMicrochip Technology, derived from the PIC1650originally developed byGeneral Instrument's Microelectronics Division. The name PIC initially referred to "Peripheral Interface Controller" now it is "PIC" only. PICs are popular with both industrial developers and hobbyists alike due to their low cost, wide availability, large user base, extensive collection of application notes, availability of low cost or free development tools, and serial programming (and re-programming with flash memory) capability.

LCD Display Fig :- lcd diplayAliquid crystal displayis a special thin flat panel that can let light go through it, or can block the light. (Unlike anLEDit does not produce its own light). The panel is made up of several blocks, and each block can be in any shape. Each block is filled withliquid crystalsthat can be made clear or solid, by changing the electric current to that block. Liquid crystal displays are often abbreviatedLCDs.Liquid crystal displays are often used inbattery-powered devices, such as digital watches, because they use very littleelectricity. They are also used for flat screenTV's. Many LCDs work well by themselves when there is other light around (like in a lit room, or outside in daylight). Forsmartphones,computer monitor, TV's and some other purposes, a back-light is built into the product.

Pin Description of PIC 16f73/72

Pin diagram of 16f72/73

Pin Description:

CHAPTER 3:METHODOLOGY3.1Process followed with the help of block diagram

COLLECTION OF COMPONENT/RESOURCES

POWER SUPPLY BLOCKCOMPONENT PLACEMENT

CONTROLLER BLOCK

DISPLBLOCK

SOLDERING+ ROUTING

PROGRAMING

TESTING

VALIDATION

IF NO

PROJECT COMPLETED

Fig no 3.1.1:process follow(pcb designing)

PCB BoardWe created a circuit that enabled our robot to follow taped lines based on the light reflected off the ground. The robot is capable of following the lines by comparing light on either side of the different colored tape using light sensors. Through this experience we have learned the basics of circuits, motors,sensors, comparators, and gears.Aprinted circuit board(PCB)mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate.PCBscan besinglesided (onecopper layer)

Fig no 3.1.2:pcb board Component Placement After the component and board have been cleaned, you are ready to place the components onto the board. Unless my circuit is simple and only contains a few components, i will probably not be placing all the components onto the board and soldering them at once. Most likely i will be soldering a few components at a time before turning the board over and placing more. In general it is best to start with the smallest and flattest components (resistors, ICs, signal diodes, etc.) and then work up to the larger components (capacitors, power transistors, transformers) after the small parts are done. This keeps the board relatively flat, making it more stable during soldering. It is also best to save sensitive components (MOSFETs, non-socketed ICs) until the end to lessen the chance of damaging them during assembly of the rest of the circuit.

SolderingSoldering is defined as "the joining of metals by a fusion of alloys which have relatively low melting points". In other words, you use a metal that has a low melting point to adhere the surfaces to be soldered together. Consider that soldering is more like gluing with molten metal, unlike welding where the base metals are actually melted and combined. Soldering is also a must have skill for all sorts of electrical and electronics work. It is also a skill that must be taught correctly and developed with practice.

RoutingInelectronic design,wire routing, commonly called simplyrouting, is a step in the design ofprinted circuit board(PCBs) andintegrated circuits(ICs). It builds on a preceding step, calledplacement which determines the location of each active element of an IC or component on a PCB. After placement, the routing step adds wires needed to properly connect the placed components while obeying alldesign rules for the IC.

ProgramingFor the programing I have used the software names as Keil. The Keil C51 C Compiler for the 8051 microcontroller is the most popular 8051 C compiler in the world. It provides more features than any other 8051 C compiler available today.The C51 Compiler allows you to write 8051 microcontroller applications in C that, once compiled, have the efficiency and speed of assembly language. Language extensions in the C51 Compiler give you full access to all resources of the 8051.The C51 Compiler translates C source files into relocatable object modules which contain full symbolic information for debugging with the Vision Debugger or an in-circuit emulator. In addition to the object file, the compiler generates a listing file which may optionally include symbol table and cross reference information.TestingAn Actual-size, single sided PCB of the microcontroller-based digital alarm clock is shown in fig and its component layout. Use IC base for microcontroller AT89S52. Also use a heat sink with voltage regulator 7805(IC2) to avoid any damage to the circuit. Check continuity between respective connections using a multimeter. checkInitially, byvarying present VR1, set the contrast level for proper wrok line flowing robot. for looser connections or dry soldering joining.

3.2 ProgrammingUsing Keil's "C51" C Compiler (Vision IDE)These simple instructions will walk you through the process of configuring Keil's Vision IDE and C51 C Compiler with settings that produce code that can be download and run on the 8051 development board .PJRC does not provide technical support for use of Keil's software.We can--not provide any assistance should these instructions not apply to your project's code or your Vision installation. However, these instructions were tested and confirmed to work using "Hello World" example provided with Keil's C51 evaluation software, version 7.06a.For further assistance with Keil's software, please refer to the manual Keilsprovides, or contact Keil for technical support.Step 1: Copy Startup Code To Your ProjectCopy the file "startup.a51" from "c:\keil\c51\lib" to "c:\keil\c51\examples\hello", or the equivilant pair of directories if you installed Vision in a different directory/drive location.Add this new copy of "startup.a51" to your project.Right click "source group 1"Choose "Add Files to Group 'Source Group 1'Set "Files of type" to "All files (*.*)"and select "Startup.a51"

When "startup.a51" has been added to your project, the left side tree representing your project will be updated, similar to Figure 1.Step 2: Edit Startup and Other CodeEdit "startup.a51" file. Locate the line "CSEG AT 0" and change it to "CSEG AT 0x2000". Remember that this will only change the "startup.a51" that you copied to this project. The global copy in "c:\keil\c51\lib" will remain unchanged.Edit "hello.c", and change the line that sets TH1. For 115200 baud, you should set this to 255.Figure 1 shows both of these files opened in Vision, edited with these changes. Figure 3.2.1:Editing Source Code

(Optional): Define a New Target Name For This BoardIn this example, the target named "Simulator" was modified to produce output compatible with this board, which is the fastest and easiest approach.Perhaps a better approach would be to create a new target, with a name such as "PJRC 8051 Development Board, Rev 5" and apply these changes to that target rather than the "Simulator" target.Step 3: Configure Build TargetClick on the "Project" menu, and select "Options for Target 'Simulator'". This will bring up the Options for Target dialog box, where you must make several changes to configure Keil's compiler to produce code that will work properly.First, select the "Target" tab:Enter 22.1184 in the "Xtal (Mhz)" field.Uncheck "Use On-chip ROM".Define "Off-chip Code memory" from 0x2000 to 0x3FFF.Define "Off-chip Xdata memory" from 0x4000 to 0x7FFF.For larger projects, you may need to change these settings to allocate the memory usage according to your project's requirements. Such memory allocation planning is beyond the scope of this simple example.

Fig 3.2.2:put the xtal rangeFinally, select the "C51" tab. Check "Interrupt vectors at address:" and set the corresponding value to 0x2000. Figure 3.2.3:Options for Target Dialog, C51 Tab

Once all these changes have been made in all three tabs, click "OK" to commit your changes to the build target.Step 4: Compile and Download Intel-Hex OutputTo compile the code, click on the "Project" menu and select "Build target". If there are n errors, the compiler will finish and produce an intel-hex output file, which in this example is "hello hex".Download the intel-hex file as described in theUsing the 8051 Development BoardFor the First Timepage. To run your program using the "J" (Jump) command, and enter 2000 (which should be the default).To quit, press the board's RESET button to return to the monitor. You may need to press the ENTER key to allow PAULMON2 to re-detect your baud rate, if your program overwrites the 4 bytes that are used to store the previously detected baud rate.Optional) Reconfigure For Flash ROMAlternately, you could define the off-chip code memory from 8000 to F7FF and off-chip Xdata memory from 2100 to 0x7FFF, set CSEG to 0x8000 in startup.a51, and set the interrupt vectors at address 0x8000. This would configure the compiled code to run from the Flash ROM, and you can use the autostart utility (on the LED blink example page) to make it run automatically when the board boots.

Proteus:-

Proteus 8 is a best simulation software for various designs with microcontroller. It is mainly popular because of availability of almost all microcontrollers in it. So it is a handy tool to test programs and embedded designs for electronics hobbyist. You can simulate your programming of microcontroller in Proteus 8 Simulation Software.After Simulating your circuit in Proteus 8 Software you can directly make PCB design with it so it could be a all in one package for students and hobbyists. So I think now you have a little bit idea about what is proteussoftware.If you have clear idea about what is proteus 8 simulation software then you can start proteus 8 simulations at this point of time. I am sure that you have your proteus 8. If you dont have then download from above link. To learn Proteus 8 You can start with a series ofvideo tutorialsor you can download aProteus 8 Software Tutorial PDF. But main and most important thing with this software is hands on experiments. the more you work the better you become There is no shortcut.After making your Schematic you have to do PCB designing so here is the video tutorial which describesSingle layer auto routing. According to me this much information is enough for what is proteus software. If you want to get more information on what is proteus software then feel free to comment below with your difficulties about what is proteus software. We will try our best to solve your difficulties related to what is proteussoftware.We have aseparate section on Proteus 8Simulation Software which covers all simulations and tutorials have a look at there.To know more and get latest updates on Proteus 8 Software Subscribe to mail and we would be sending you all the updates related to Proteus 8 software

Fig no 3.2.4:open the proteusAnd after some time you will go to a upper part of aro. This arocolour is white .this aero will go to isis.Then proteus window is openFig no 3.2.5:open the proteus windowAnd after some time you will go to the library .and select the component . there are many component Are available.and all are simulate the circuit.we are show this diagmram

Fig no 3.2.6: choose the components

Then after simulate the circuit burn the program in the micro controller we are show the this circuit diagramFig no 3.2.7:burn the program in proteusWhen the program is burn in circuit then you will chek .this ckt is doing proper wrok or not.We show this diagram

Fig no 3.2.8: proteus is ckt is wroking

CHAPTER 4:TESTING AND VALIDATION OF RESULT

First of all I want to check the power supply when power supply is awrok properly.

Fig no 4.1:testing power supplyWhen the power supply connect the pic microcontroller and chek the out put it is wrokproperlly or not

Fig no 4.2:testing microcontroller

CHAPTER 5: FUTURE SCOPEIna future we can modify sound activated massage display as sound operated massage display a what we are saying that all are display on the lcd screen by advancing and connecting it sound module and memory in the present circuit of project.This can be help in to produce smart notice board at school, collage, railway station, hospital etc. whare the immediate announcement are required after very small interval of time. By this if there is any announcement than we display on the screen by asking againsd the condenser microphone sensor which sense the voice signal and sound module converted that signal after different procces it will display in the screen of lcd.

CHAPTER 6: CONCLUSION

This is an interesting idea in which a message is displayed on an LCD screen whenever a sound is produced. The message remains on LCD for a short duration of time and then disappears. This topic demonstrates the interfacing of a sound operated circuit and LCD display with the pic microcontroller (16f73). The circuit can be used to display welcome message at entrance; or warning messages at public places. It can also be used to aid communication for deaf and dumb people.

APPENDIXPROGRAMING:

#include#define port P1#define dataport P2 //Data port for LCD#define sec 1000//CONTROL PINSsbit rs = port^0;sbit rw = port^1;sbit e = port^2;sbit sensor_input=P0^0;

void delay(unsigned int sec) //Time delay function{int i,j ;for(i=0;i