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Thursday, 29 January 2009

The above project uses two nos transreceiver modules ,and the circuit
communicates at 9600 kbps. 'c' codes comes with along with project

Induction loads like heavy induction motors are widely used in the
industries and suppose if all the loads are switched onat a time will
lead to heavy overloads and breaker tripp and interruption of power
supply and breakdown. such loads should be switched on sequentially
to avoid over loading and tripping.This load shedder projects is the fine
solution to such requirements the project is based on most popular 8051 microcontroller and is capable of contolling eight such loads sequentially
after a pre- programmable time delays.

Eight channel datalogger

Eight channel datalogger is designed using atmel AT89c51 Microcontroller and eight channel ADC0809 .

This logger not only shows the converted data on two line lcd in real time but also sends the data to P.C. for logging purpose.Value shown on the lcd are in ascii hex format.Similarly data sent to pc com port is also in ascii hex format ie 00h to ffh. This data logger can be used at any place where regular data monitoring is required.Further data can be viewed in graph mode or in bar mode,.if you know how to design that type of software in c, c++ or visual basic.alternatively you can see the data in hyperterminal available in all the computers provided by Microsoft.

HOTEL POWER MANAGEMENT


This is unique project designed to save electrical bills specially in hotel environment. Normally it happens that customers comes to the hotel and while going out from the hotel they often leave the lights and fan ON. Normally the customers surrender the key to the reception counter while leaving. If the reception staff could switch OFF. The power to the unoccupied rooms through there computer keyboard immediately, they can save lot of power. Similarly while handing over the key to the customers they can again switch on the power to the rented room. The project is design for four floors and eight rooms. operated through hyperterminal provided with every pc software.

Electronic Eye with event logging on PC :-This project is same as electronic eye and also logs an event of the action, Time stamp can be put on the event .by pc timer .Microcontroller sends the data through inbuilt UART through rs 232 converter./

This project is based on high sensitive IR Transmitter & Receiver having range of more than 15 feet. When you are away for your house any if anyone tries to enter the house by any means the device shouts CHOR-CHOR-CHOR-PAKDO-PAKDO-PAKDO Continuously more than 40 seconds, that is enough to chase the thief, he will run away so your house is protected. The device not only shouts but also dials out previously stored telephone number ( which you have stored) and gives you the message CHOR- CHOR- CHOR. So that you understand that something is wrong at your house, you can immediately call up your neighbor to look after your house.

Working Description of Electronic Eye with Dial-Up 1. Keep the transmitter & receiver aligned in a straight position facing each other about a distance more than 2 meter but not less than that.2. Connect the two 1.5v cells inside the bobbin of transmitter module properly.3. Connect the telephone line to telephone line input of the circuit.4. Connect the mains cord to 230v AC of your supply & switch on the supply.5. When you switch on the supply if the circuit initially plays any alarming message only press the reset switch to make the message off.6. The message will reset only after completing the total message when you have pressed the reset switch SW1.7. If the message is continuously playing after the reset switch has been pressed means that the transmitter (TX) & receiver (RX) is not properly aligned or it is being obstructed.8. Switch on the power supply if no message is played first step is to store the telephone number of the concerned person.9. To store the telephone number press the off hook switch SW2. Dial the telephone number by the keypad. 10. By doing that the green LED on the PCB will be glowing showing that the telephone number has been dialed.11. Wait for 5 to 6 seconds after dialing out the telephone number then take off the hand from the off hook switch means that your number has been stored.12. After that obstruct the beam created between infrared receiver (RX) & transmitter (TX) immediately after that you hear the alarming message (chor chor ….) through the speaker.13. At the same time it will dial out the telephone number which has been stored.14. You can hear the same alarming message through telephone line for 30 seconds. 15. The message will be stopped for 30 seconds & again after 30 seconds you can hear the same message through telephone line till no one is resetting the circuit.

Electronic eye 89c51


Electronic Eye:-This project is based on Intel's8051 family of microcontroller.

This project is based on high sensitive IR Transmitter & Receiver having range of more than 15 feet. When you are away for your house any if anyone tries to enter the house by any means the device shouts CHOR-CHOR-CHOR-PAKDO-PAKDO-PAKDO Continuously more than 40 seconds, that is enough to chase the thief, he will run away so your house is protected. The device not only shouts but also dials out previously stored telephone number ( which you have stored) and gives you the message CHOR- CHOR- CHOR. So that you understand that something is wrong at your house, you can immediately call up your neighbor to look after your house.

Working Description of Electronic Eye with Dial-Up 1. Keep the transmitter & receiver aligned in a straight position facing each other about a distance more than 2 meter but not less than that.2. Connect the two 1.5v cells inside the bobbin of transmitter module properly.3. Connect the telephone line to telephone line input of the circuit.4. Connect the mains cord to 230v AC of your supply & switch on the supply.5. When you switch on the supply if the circuit initially plays any alarming message only press the reset switch to make the message off.6. The message will reset only after completing the total message when you have pressed the reset switch SW1.7. If the message is continuously playing after the reset switch has been pressed means that the transmitter (TX) & receiver (RX) is not properly aligned or it is being obstructed.8. Switch on the power supply if no message is played first step is to store the telephone number of the concerned person.9. To store the telephone number press the off hook switch SW2. Dial the telephone number by the keypad. 10. By doing that the green LED on the PCB will be glowing showing that the telephone number has been dialed.11. Wait for 5 to 6 seconds after dialing out the telephone number then take off the hand from the off hook switch means that your number has been stored.12. After that obstruct the beam created between infrared receiver (RX) & transmitter (TX) immediately after that you hear the alarming message (chor chor ….) through the speaker.13. At the same time it will dial out the telephone number which has been stored.14. You can hear the same alarming message through telephone line for 30 seconds. 15. The message will be stopped for 30 seconds & again after 30 seconds you can hear the same message through telephone line till no one is resetting the circuit.

FDD.,HDD AND PRINTER FAULT DIAGONOSTIC CARDS


These three cards have all the bufferd signals out put, connected to leds for monitoring all the control and data signals from pc to above devices and from above devices to pc .Simultaneously you can also monitor these signals on scope. comes with power supply and all the required cables with complete documentation.

HOME/ OFFICE SECURITY SYSTEM (8051 BASED)


Securiy is a matter of great concern to all of us in this world. Normally there are four types of security threat to our property. 1 )Thief, an inturder. 2)Fire, so we use fire sensor. 3)Water spilage /over flow, so we use water sensor. 4) Gas leak , we use gas sensor, whenever there is security breach from one of above or any combination of above. The project takes the following action 1) Sounds an ALARM to attract your or public attention . 2) If the reset sw is not pressed within 30 seconds the projects takes further action, 3) It makes an emergency call to deliver an emergency message stored in speech IC. 4) It will make five attempts to call you before it checks the conditions again. The project presented here is based on world’ s most powerful intel’ s mcs-51 family of microcontroller atmel at89c51.

CIRCUIT EXPLANATION: This project is based on 8051 microcontroller.(IC2) IC3 and is used as buffer. IC4 is a one time programmable(otp) chip where messages are stored. This is 21 second speech ic where total of 12 messages can be recorded on eight different locations, but total duration should not be more than 21 seconds. Recorded messages can be played back by setting the trigger pin 10 & 11 to high, making these pin low will stop the message, Setting these pin high will repeatedly replay the same message. IC5 is an audio amplifire . Audio output from speech ic(IC4) pin no 7 cout is coupled to this ic on pin no 3 through VR2 volume control and C10. Amplified output from pin no 5 drives the speaker through capacitor C14. R14 and C13 corrects the tone. .C15 and C16 couples the audio message to telephone line.

IC4 needs 3.3v operating voltage .R9 is a voltage dropping resistor, D7 is 3.3v zener diode and C7 is a filter capacitor. These components will always maintain the voltage to3.3v at pin 9,12 of IC4. capacitor C8 is a feed back capacitor.,C9 and R13 connected to pin no 7 of IC 4 are tone corrector.R12 along with the VR1 variable resistor performs the sampling rate adjustment. R10 and R11 connected to pin26 and pin 27 of the microcontroller are voltage dropping resistors. R15 and R16 connected to the base of transister Q1 and Q2 are voltage dropping resistors and drives transistors Q1 & Q2 when set to high logic by microcontroller. Q1 Drives the dial relay RL1and Q2 drives the off-hook relay.RL2........................

This projects not only displays the token number but also announce the number of the called party. Token number is displayed on three seven segment display. An emergency foot switch is provided, which can be operated by the cashier incase of looting or any other similar reason, the siren will start.An autodialer will will make an emergency call to police station or whetever telephone no has been stored.

SIX CHANNEL PETROCHEMICAL FIRE MONITORING AND CONTROL STATION


MODERN PETROCHEMICAL PLANTS ARE ALWAYS AT THE RISK OF FIRE SINCE LOT OF TOXIN INFLAMMABLE GASES ARE OFTEN PRESENT ALSO THE TEMPERATURE IS ALSO HIGH . THESE ARE NORMALLY UMS CLASS (UNMANNED MACHIONERY SPACE) SUPERVISORY ROOMS ARE ALWAYS AWAY FROM THE ACTUAL PLANTS. ALL LIGHT FIXURES ARE EXPLOSION PROOF. LITTLE SPARK CAN CAUSE GREAT FIRE. NORMAL FIRE SENSORS CAN NOT BE UTILISED THERE. SPECIALLY DESIGNED SENSORS ARE USED THERE TO SENCE SMOKE. IN CASE IF ANY SENSOR SENSES SMOKE

THE FOLLOWING ACTION WILL TAKE PLACE

Start the fire alarm or siren. Shut down the plant. Start sprinkling .

IF THE RESET SW IS NOT PRESSED WITHIN 30 SECONDS THE PROJECTS TAKES FURTHER ACTION, IT DIALS OUT PRESTORED NUMBER AND DELIVERS AN EMERGENCY MESSAGE STORED IN SPEECH IC. THE DIALING OUT CONTINEWS TILL A PERSON COMES AND PRESS THE RESET SW MAKING THIS SYSTEM FOOL PROOF. YOU CAN EVEN STORE YOUR MOBILE PHONE NUMBER. THIS PROJECT IS BASED ON 8051 MICROCONTROLLER.

OPERATION: CONNECT THE TELEPHONE LINE TO TEL IN CONNECTOR

THERE SHOULD BE 50V TO 54 VOLTS AT THE TEL CONNECTOR, CONFIRMS THE PROPER TELEPHONE CONNECTION. NOW PLUG IN THE POWER CONNECTOR TO 250V MAINS. ALL LEDS WILL BLINK.INDICATES STANDBY MODE. PRESS ON /OFF SWITCH (SW3) BLINKING WILL STOP AND PLANT ON RELAY WILL BE ON AND PLANT ON INDICATION WILL BE ON.2. PRESS SW1, OFF-HOOK RELAY WILL BECOME ON. THIS IS EQUILVALENT TO LIFTING THE HANDSET OF THE TELEPHONE. AND NOW YOU CAN STORE THE TELEPHONE NUMBER THROUGH THE DIALER KEY PAD. DIAL ANY NUMBER OTHER THAN THE LINE CONNECTED TO THIS DEVICE.IT CAN BE YOUR MOBILE NUMBER. YOU WILL RECEIVE THE BELL ON THE CALLED NUMBER. AFTER HEARING TWO THREE BELLS.PRESS SW1 AGAIN. THIS WILL STOP REINING.EQUIVALENT TO PUTTING THE RECEIVER BACK.NOW THE DEVICE IS READY TO MONITOR THE FIRE SENSORS. ONLY TWO SENSORS ARE PROVIDED WITH THE PROJECT. OUT PUT CAN BE CONNECTED TO ANY CHANNEL TO SHOW THE DEMONSTRATION. YOU CAN BLOW BLACK SMOKE THROUGH THE SENSORS USING AGGARBATTI OR CIGERATE BLOWING. SENSITIVITY OF THE SENSORS CAN BE ADJUSTED BY TURNING THE SCREW TO SLIGHTLY CLOCKWISE . FITTED INSIDE THE SMOKE SENSOR BOTTOM SIDE YOU WILL HAVE TO OPEN THE BOTTOM PLATE OF THE SENSOR TO DO THIS SAME WAY OVERSENSIVITY WILL CAUSE FALSE ALARM ,SO TURN IT SLIGHTLY ANTICLOCKWISE. HOWEVER WE ADJUST EVERY THING BEFORE SHIPMENT. SUPPOSE YOU BLOW SMOKE THROUGH THE SMOKE SENSOR AND IT GET TRIGGERD YOU WILL HEAR SIRON SOUND AND THE RESPECTIVE LED GLOWING AND EMERGENCY LED BLINKING. IF THE RESET SW2 IS NOT PRESSED WITHIN THIRTY SECON. THE DEVICE WILL TAKE FURTHER ACTION AFTER THIRTY SECOND THE PLANT RELAY WILL BE OFF AND SPRINKLE TLAY WILL BECOME ON THE DEVICE WILL DIAL UP THE TELEPHON NUMBER AND EMERGENCY MESSAGE. THIS PROCESS OF DIALING AND REPETED MESSAGE WILL CONTINUE TILL YOU RESET THE RESET (SW2)

Eight Channel Telephone (G.S.M) Controlled Switch With Voice

TELEPHONE CONTROL SWITCH WITH VOICE

( GSM CONTROLL SWITCH) USING MOBILE PHONE

THE SAID PROJECT IS DESIGNED ON THE PRINCIPAL OF DTMF DECODING.OUR MODERN TELEPHONE AND EVEN OUR MOBILE PHONE USES DTMF CODING FOR NUMBER DIALING. THESE DTMF CODES CAN BE DECODED AND UTILISED FOR USEFUL PURPOSES. THE CIRCUIT UTILISES IC8870 FOR DTMF DECODING . MICROCONTROLLER 89C51 READS THESE CODES AND TAKES THE NECESSARY ACTION.

CIRCUIT DESCRIPTION: TELEPHONE LINE IS CONNECTED AT CONNECTOR K1. WHENEVER SOMEONE CALLS THIS NUMBER, THAT TIME TELEPHONE LINE CARRIES ABOUT 70V RINGING SIGNAL SIGNAL IS RECTIFIED BY THE BRIDGE D5-D8 AND FILTERED BY C4, R20, AND D9 AND DRIVES AN OPTO COUPLER IC U8 MCT2E . COLLECTOR OF THE OPTOCOUPLER WILL GO LOW WHENEVER BELL RINGS. SINCE THE COLLECTOR IS CONNECTED TO P2.7 OF MICROCONTROLLER 89C51. NUMBER OF TIMES IT GOES LOW IS COUNTED BY MICROCONTROLLER. AFTER SIX TO EIGHT RINGS,P1.0 WILL GO HIGH AND SWITCH ON TRANSISTER T4 AND ENERGISE THE OFF HOOK RELAY RL1 . THE CONTECTS OF RELAY RL 1 WILL BECOME CLOSED AND THE TELEPHONE LINE WILL GET CONNECTED TO DTMF DECODER IC 8870, THROUGH C7 AND C8. RESISTANCE R8 COMES ACROSS THE TELEPHONE LINE AND THAT LOWERS THE VOLTAGE,AND THIS ULTIMATELY SENDS MESSAGES TO EXCHANGE THE USER HAS LIFTED THE HAND SET. AT THE SAME TIME ,MICROCONTROLLER PIN P3.5 WILL TRIGGER THE VOICE IC API8208 WHERE ALL THE MESSAGES ARE STORED. CALLER WILL GET THE MESSAGE”PLEASE INTER THE PASSWARD”THE DEFAULT PASSWORD IS 1-2-3-4. WHEN CALLER ENTERS THIS 4 DIGIT PASSWORD. IC 8870 DECODES THESE NUMBERS AND BINARY NUMEBRS ARE AVAILABLE AT Q1 TO Q4 ,PIN NO 11-14 OF DTMF DECODER WHENEVER NEW CODE COMES PIN NO 15( STB) OF DTMF DECODER WILL PULSE LOW, AND IS CONNECTED TO P1.1 INFORMING MICROCONTROLLER THAT CODES ARE AVAILABLE PLEASE TAKE THEM . MICROCONTROLLER WILL READS THESE CODES ONE BY ONE, THROUGH ITS LINE P1.2-P1.5. IF THE CODES MATCHES WITH THE CODES INSIDE THE MICROCONTROLLER, MICROCONTROLLER WILL SEND MESSAGE “ PLEASE ENTER CHANNEL NUMBER”. IF THE PASSWARD ENTERED IS NOT CORRECT. MICROCONTROLLER WILL DISCONNECT THE TELEPHONE LINE WITHOUT ANY REPLY, BY MAKING P1.0 LOW.

IF THE PASSWORD ENTERED IS CORRECT. YOU WILL GET MESSAGE “PLEASE ENTER CHANNEL NUMBER” NOW YOU HAVE TWO CHOICES

1. YOU CAN GO TO NORMAL ON /OFF MODE

2. YOU CAN CHANGE YOUR PASSWORD

NORMAL ON/ OFF MODE PRESS STAR AND 1( * & 1) NOT TOGETHER ONE BY ONE AFTER THAT PRESS 1&1 TO SWITCH ON IST RELAY.SIMILARLY

ALL RELAYS CAN BE SWITCHED ON AS FOLLOWS

* & 1 NORMAL ON /OFF MODE

1& 1 TO SWITCH ON IST RELAY

2&1 TO SWITCH ON 2ND RELAY

7&1 TO SWITCH ON SEVENTH RELAY

9 & 1 TO SWITCH ON ALL RELAYS

EVERY TIME YOU WILL RECEIVE MESSAGE” REQUESTED CHANNEL IS ON “PRESS CHANELL NO AND 0 SAY 1&0 WILL SWITCH OFF IST RELAY,2&0 WILL SWITCH OFF 2ND RELAY. 9&0 WILL SWITCH OFF ALL RELAYSYOU WILL RECEIVE “REQUESTED CHANNEL IS OFF’ MESSAGE .IF YOU WANT TO KNOW THE STATUS OF THE PREVIOUSLY ON/ OFF RELAYS.PRESS CHANNEL NUMBER AND 2, SAY 2&2 WILL MESSAGE WHEATHER THE CHANNEL IS ON OR OFF .IF YOU WANT TO CHANGE THE PASSWORD FOLLOW THESE STEPS

DIAL THIS NUMBER FROM OTHER LINE AFTER SIX TO EIGHT BELLS YOU WILL RECEIVE MESSAGE ” PLEASE ENTER YOUR PASSWORD”. (1,2,3,4)SO YOU ENTER YOUR PASSWORD AND WAIT FOR THE MESSAGE “ PLEASE ENTER THE CHANNEL NUMBER” NOW1.PRESS * & 2 ( FIRST STAR AND THEN TWO).YOU WILL RECEIVE MESSAGE(“PLEASE ENTER YOUR PASSWORD”.SO YOU MUST ENTER YOUR OLD PASSWORD AGAIN.SAY(1,2,3,4)AFTER THAT YOU WILL RECEIVE MESSAGE ”PLEASE ENTER NEW PASSWORD” SAY YOU ENTERED 4,5,6,7, YOU WILL RECEIVE MESSAGE “YOUR PASSWORD HAS BEEN CHANGED’’ KEEP THE HENDSET BACK ON THE INSTRUMENT FROM WHERE YOU ARE CALLING.NEXT TIME WHEN YOU DIAL ,YOU WILL HAVE TO ENTER YOUR NEW PASSWORD. NEW PASSWORD WILL STAY AS LONG AS POWER IS NOT INTERRUPTED.IF POWER FAILS IT WILL REVERT TO DEFAULT PASSWORD 1,2,3,4,

I.V.R.S SYSTEM FOR INDUSTRIAL CONTROL

THE MENTIONED PROJECT IS BASED ON THE WORLD,S MOST POWERFUL INTEL CONTROLLER 8051. MOST OF THE SERVICES PROVIDED IN TODAYS WORLD ARE VOICE INTERACTIVE, YOU CALL UP YOUR BANK AND COMPUTRISED VOICE WILL SPEAK TO YOU,AND GUIDE YOU TO ENTER A PARTICULAR NUMBER FROM YOUR PHONE TO GET THE DESIRED SERVICE.THIS SERVICE IS ONLY AVAILABLE THROUGH THE FAST SPEED COMPUTERS AND HAVING HUGE AMMOUNT OF MEMORY.WE EMPLEMENTED INTERACTIVE SERVICE FOR INDUSTRIAL APPLICATIONS

YOU CAN SWITCH ON/OFF DEVICES USING YOUR MOBILE PHONE OR LAND LINE PHONE EIGHT NUMBERS LOADS CAN BE CONNECTED TO THE EIGHT RELAY PROVIDED.NOT ONLY YOU CAN SWITCH ON /OFF DEVICES IT WILL ALSO DIAL OUT A TELEPHONE NUMBER IN CASE OF SECURITY THREAT,OR ANY SAFETY OR PROTECTION PARAMETERS GOES BEYOND SAFETY LIMIT. IN CASE OF ANY OF THE ABOVE , FOR EX. TEMPERATURE OF THE MACHIONERY HAS GONE BEYOND SAFETY LIMIT ,THE DEVICE WILL FIRST SWITCH OFF THE PLANT AND DIALS OUT THE PRESTORED TELEPHONE NUMBER AND DELIVERS THE EMERGENCY MESSAGE. IT WILL DIAL OUT FOE FIVE TIMES AT THE INTERVAL OF ONE MINUTE AND AGAIN MONITOR THE PARAMETERS, AND IF THE PARAMETERS ARE NOT WITHEN LIMIT AGAIN IT WILL DIAL OUT . THIS CYCLE WILL REPEATE UNTIL THE PARAMETERS BECOMES NORMAL.

APPLICATION: THIS PRJECT COULD BE USED FOR VARIETY OF PURPOSE WHERE YOU WANT TO CONTROL SOMETHING REMOTELY.

A) SUPPOSE YOU OWN A COMPANY AND ARE THREE OR MORE PARTNERS AND ARE ALWAYS TRAVELLING. YOU HAVE AN OFFICE LOCATED SOME WHERE. AND HAVE A MAIN SERVER YOU DONOT WANT THAT SOMEBODY OTHER THEN YOUR PARTNER SHOULD HANDLE THIS SERVER DUE TO SECURITY REASON. AT THE SAME TIME YOU DONOT WANT TO KEEP YOUR SERVER ALL THE TIME ON SO THER THIS DEVICE COMES TO YOUR HELP ONLY REQUIREMENT FOR THIS DEVICE IS A PARALLEL TELEPHONE CONNECTION.AND OF COURSE POWER SUPPLAY.YOU CAN SWITCH ON YOUR SERVER REMOTELY FROM ANY WHERE IN THE WORLD. WHENYOU DIAL THE NUMBER WHERE THIS DEVICE IS CONNECTED WITH THE SERVER,AFTER EIGHT NUMBER OF BELL RINGING YOU WILL HEAR PLEASE ENTER YOUR PASSWORD. WHEN YOU ENTER THE PASSWORD. IF YOUR PASSWORD IS CORRECT THEN DEVICE WILL FURTHER RESPOND OTHERWISE WITHOUT GIVING ANY FURTHER RESPONSE DEVICE WILL DISCONNECT YOU.IF YOU NUMBER IS CORRECT YOU WILLRECEIVE THESE MESSAGE

PRESS ONE FOR NORMAL ON OFF, PRESS TWO FOR PASSWORD CHANGE PRESS THREE FOR TELEPHONE NUMBER CHANGE, PRESS STAR TO LISTEN THIS MENU AGAIN.

SO IF YOU PRESS 1 AND 1&1 YOU GET MESSAGE REQUESTED CHANNEL IS ON OR 1&0 REQUESTED CHANNEL IS OFF 1&2 TO NOW THE STATUS OF PREVIUSLY ON OR OFF CHANNELS SIMILARLY WITH ALL THE EIGHT CHANNELS SAME COMBINATIONS ARE APPLIES YOU CAN PRESS STAR(*) TO GO BACK TO PREVIOUS MENU.

NOW PRESSING TWO YOU CAN CHANGE THE PASSWORD AND DEVICE WILLRESPOND LIKE THIS PLEASE ENTER YOUR PASSWORD AND YOUR PASSWORD HAS BEEN CHANGED. SIMILARLAY BY PRESSING THREE YOU CAN CHANGE TELEPHONE NUMBRER.AND DEVICE WILL RESPOND PLEASE ENTER NEW TELEPHONE NUMBER &YOUR LELEPHONE NUBBER HAS BEEN CHANGED.

B) THIS WAS ONE EXAMPLE OF THIS DEVICE SIMILARLY THIS COULD BE USED TO CONTROL OR SWITCH ON ANY PROCESS CONTROL MACHIONARY WHERE ALLFUNCTIONS ARE AUTOMATIC. ELECTRIC GRID COULD BE CONTROLLED REMOTELY. OR OUTOMATIC PRODUCTION MACHIONERY COULD BE CONTROLLED EVEN DURING ODD HOURS WITH YIUR MOBILE PHONE.

SECURITY FEATURES OF THIS DEVICE SUPPOSE THERE IS FIRE AT THE MACHIONERY SPACE THIS DEVICE WILL SWITCH OFF THE MACHIONERY FIRST AND THE DIAL OUR THE PRE STORED NUMBER TO YOUR PHONE AND WILL DELIVER THE EMERGENCY MESSAGE. AND WILL KEEP DIALING UNTILL YOU COME AND PERSONALLY RESET THIS DEVICE.

THIS DEVICE HAS THE FOLLOWING BLOCKS

1.RING DETECTOR CIRCUIT COMPRISES OF BRIDGE RECTIFIRE D1-D4 AND OPTO COUPLER U8 MCT2E

2. WATCH DOG TIMER COMPRISING OF IC 7400 AND U7 IC 4047

  1. DTMF DECODER IC U6 8870
  2. DIALER CIRCUIT RELAY RL2 TRANSISTER Q1
  3. OFF HOOK CIRCUIT RELAY RL1 AND TRANSFORMER TR1 C5 AND R8.
  4. MICROCONTROLLER CIRCUIT THE CENTRAL PROCESSOR 89C51
  5. SPEECH CIRCUIT IC UV1 1840 WHERE ALL THE MESSAGES ARE STORED
  6. AMPLIFIRE CIRCUIT IC UV2 LM 386
  7. SECURITY STORAGE IC 93C46
  8. AND LOAD CONTROLLER WHERE RELAY BOARDS WILL BE CONNECTED P1
  9. POWER SUPPLAY CIRCUIT IC U10 7805,BRIDGE RECTIFIRES D1-D4
  10. CAPACITOR C1 AND C2
  11. FIRE SENSOR IS CONNECTED TO CONNECTOR P2 CONNECTOR

GRID CONTROL/LOAD SHEDDER

Application area: the project can be used for various application wherever you require control using pc. 1 hotel power management 2.street light management 3.home automation 4.load shedding 5. High voltage grid control 6. Industrial automation 7.electro,hydrolic and pneumatic valve control 8. Robotic control and many more All the above operation are possile from the ibm pc through com port.User can control the devices using one of the following ways

1. Direct from pc using hyperterminal, 2. Dialup network 3. Internet, using web applications 4. Through s.m.s.

GSM CONTROLLED DOOR LATCH OPENER WITH SECURITY AUTODIAL-UP

THE SAID PROJECT IS DESIGNED ON THE DTMF DECODING.OUR MODERN TELEPHONE AND EVEN OUR MOBILE PHONE USES DTMF CODING FOR NUMBER DIALING. THESE DTMF CODES CAN BE DECODED AND UTILISED FOR USEFUL PURPOSES. THE CIRCUIT UTILISES IC8870 FOR DTMF DECODING . MICROCONTROLLER 89C51 READS THESE CODES AND TAKES THE NECESSARY ACTION. DOOR LATCH CAN BE OPENED BY ENTERING THE CORRECT PASSWORD , YOU CAN ALSO CONNECT SECURITY SENSORS OF YOUR CHOICE ,IN CASE OF ANY BREACH OF SECURITY TAKES PLACE , THE DEVICE WILL DIAL OUT THE PRESTORED NUMBER AND DELIVERS AN EMERGENCY MESSAGE.

CIRCUIT DESCRIPTION: TELEPHONE LINE IS CONNECTED AT CONNECTOR K1. WHENEVER SOMEONE CALLS THIS NUMBER, THAT TIME TELEPHONE LINE CARRIES ABOUT 70V RINGING SIGNAL SIGNAL IS RECTIFIED BY THE BRIDGE D5-D8 AND FILTERED BY C4, R20, AND D9 AND DRIVES AN OPTO COUPLER IC U8 MCT2E . COLLECTOR OF THE OPTOCOUPLER WILL GO LOW WHENEVER BELL RINGS. SINCE THE COLLECTOR IS CONNECTED TO P2.7 OF MICROCONTROLLER 89C51. NUMBER OF TIMES IT GOES LOW IS COUNTED BY MICROCONTROLLER. AFTER SIX TO EIGHT RINGS,P1.0 WILL GO HIGH AND SWITCH ON TRANSISTER T4 AND ENERGISE THE OFF HOOK RELAY RL1 . THE CONTECTS OF RELAY RL 1 WILL BECOME CLOSED AND THE TELEPHONE LINE WILL GET CONNECTED TO DTMF DECODER IC 8870, THROUGH C7 AND C8. RESISTANCE R8 COMES ACROSS THE TELEPHONE LINE AND THAT LOWERS THE VOLTAGE,AND THIS ULTIMATELY SENDS MESSAGES TO EXCHANGE THE USER HAS LIFTED THE HAND SET. AT THE SAME TIME ,MICROCONTROLLER PIN P3.5 WILL TRIGGER THE VOICE IC API8208 WHERE ALL THE MESSAGES ARE STORED. CALLER WILL GET THE MESSAGE”PLEASE INTER THE PASSWARD”THE DEFAULT PASSWORD IS 1-2-3-4-5-6. WHEN CALLER ENTERS THIS 6 DIGIT PASSWORD. IC 8870 DECODES THESE NUMBERS AND BINARY NUMEBRS ARE AVAILABLE AT Q1 TO Q4 ,PIN NO 11-14 OF DTMF DECODER WHENEVER NEW CODE COMES PIN NO 15( STB) OF DTMF DECODER WILL PULSE LOW, AND IS CONNECTED TO P1.1 INFORMING MICROCONTROLLER THAT CODES ARE AVAILABLE PLEASE TAKE THEM . MICROCONTROLLER WILL READS THESE CODES ONE BY ONE, THROUGH ITS LINE P1.2-P1.5. IF THE CODES MATCHES WITH THE CODES INSIDE THE MICROCONTROLLER, MICROCONTROLLER WILL SWITCH ON THE ELECTRO MAGNETIC OPERATED LATCH FOR 10 SECONDS AND USER CAN ENTER THE APARTMENT . IF THE PASSWARD ENTERED IS NOT CORRECT. MICROCONTROLLER WILL DISCONNECT THE TELEPHONE LINE WITHOUT ANY REPLY, BY MAKING P1.0 LOW.

1. IF THE PASSWORD ENTERED IS CORRECT. YOU CAN ALSO CHANGE THE PASSWORD STORED. THIS PASSWORD STORED GOES INTO SERIAL EPROM IC 9346 THAT IS NON VOLATILE RAM IN CASE POWER FAILS THE PASSWORD IS NOT LOST

IF YOU WANT TO CHANGE THE PASSWORD FOLLOW THESE STEPS

DIAL THIS NUMBER FROM OTHER LINE AFTER SIX TO EIGHT BELLS YOU WILL RECEIVE MESSAGE ” PLEASE ENTER YOUR PASSWORD”. (1,2,3,4,5,6 and #)SO YOU ENTER YOUR PASSWORD AND WAIT FOR THE MESSAGE IF YOU ENTER 2 THEN DEVICE WILL RESPOND PLEASE ENTER NEW PASSWORD WHEN YOUR PASSWORD ENTRY IS OVER PRESS # AFTER PASSOWRD ENTRY INDICATE THAT YOUR ENTRY IS OVER AND MICROCONTROLLER WILL RESPOND “YOUR PASSWORD HAS BEEN CHANGED’’ KEEP THE HENDSET BACK ON THE INSTRUMENT FROM WHERE YOU ARE CALLING.NEXT TIME WHEN YOU DIAL ,YOU WILL HAVE TO ENTER YOUR NEW PASSWORD.

SIMILARLY YOU CAN ALSO CHANGE THE TELEPHONE NUMBER.

IC U7 4047 ACTS LIKE WATCHDOG AS LONG COMMUNICATION IS GOING ON IT DOES NOTHING THE MOVEMENT COMMUNICATION IS OVER ITS OUT PUT AT PIN NO 10 CONNECTED TO PIN P3.2-INT0 WILL INTERRUPT THE PROCESSOR AND PROCESSOR WILL MAKE THE P1.0 LOW AND DISCONNECTING TELEPHONE LINE .THE TIME TO SWITCH OFF THE OFF- HOOK RELAY IS DECIDED BY C6 AND R19 CONNECTED TO IC 4047.TRANSISTER T1 AND T2 DRIVES THE LED D12 TO GIVE VISUAL INDICATION OF COMMUNICATION. TRANSFORMER TR1 IS 1:1 TRANSFORMER (160 OHM) PROVIDES ISOLATION BETWEEN TELEPHONE LINE AND SPEECH CIRCUIT.

hay if any wants to share this blog email me
sebindavisk@gmail.com

Tuesday, 27 January 2009

Computer Projects

Electronics Projects

Computer Project Ideas

Computer Project Ideas





Biometric attendance

Anyway I got this description on your site but I desire to see its' schematic diagram. How do I go about it? (Biometric attendance systems are fool proof systems. Fingerprint is one such system where a person’s finger print is used as his biometric identification. This technology can be used in schools and colleges to take attendance. The teacher will bring the small handheld with a finger scanner. Students press their fingers on it for attendance. This system has got many advantages. Manual Data entry is avoided No Proxy attendances can be made. Guardians can be informed about absent.)

Global Positioning of Robot Manipulators

The existing controllers for robot manipulators with uncertain gravitational force can globally stabilize only robot manipulators with revolute joints. The main obstacles to the global stabilization of robot manipulators with mixed revolute and prismatic joints are unboundedness of the inertia matrix and the Jacobian of the gravity vector. In this note, a class of globally stable controllers for robot manipulators with mixed revolute and prismatic joints is proposed. The global asymptotic stabilization is achieved by adding a nonlinear proportional and derivative term to the linear proportional–integral-derivative (PID) controller. By using Lyapunov's direct method, the explicit conditions on the controller parameters to ensure global asymptotic stability are obtained.

Automated Parking System

he project must have a system in which the car's driver is informed whether the parking is full or not.He is informed using LEDs(green,red).If parking is available the gate opens automatically.The counter is incremented or decremented using two devices which emit rays(one for incoming cars and the other for outgoing cars).All this must be done using microprocessor(mosty INTEL 8085).Please help me with this project.reply as early as possible.

just by topics

Converting voice message to a text signal

Embedded sensor networks

A wireless sensor network (WSN) is made of numerous small independent sensor nodes, which consist of a battery, radio, sensors, and a minimal amount of onboard computing power and has wireless communication capabilities among sensor nodes. Application of sensor nodes is quite common in the field of Agricultural monitoring (for climate sensitive crops), structural monitoring etc. However object detection, classification and tracking using WSN is more challenging and involves sensing and recognizing an object that enters the network area by collecting signals (acoustic, magnetic etc.) and processing them not only in real time but also involving restricted power consumption constraints. The real time applications include vehicle tracking, inventory tracking inside factories, military tracking and identification of hostile intrusion vehicles, and automatic tollgate collection based on two wheelers or four wheelers.

Sensor nodes are distributed in an optimized pattern and by taking in to account the limited power sources of sensor nodes, the tracking of object or target with random movement patterns is done by an energy efficient tracking algorithm, called selective activation combined with prediction. Audio signals are used to detect and classify the objects among the known classes. Specific parameters called feature vectors are calculated from the sampled audio signals for various objects and are used to train the classifier for classifying the object to its class. The selection of appropriate classifier and feature vectors proved to be very significant for achieving high accuracy percentage in classification. Thus a highly customized version of classifier and tracking algorithm specifically suitable for WSN is achieved.

The proposed classification and tracking algorithm is implemented in matlab considering vehicles (Light and Heavy Vehicles) as targets and audio signal as signal source. The classification of the target is done along predictive tracking and the energy consumed per unit time in the sensor network is calculated. The overall response of the classifier for varied signals is also tested and accuracy percentages were determined. Thus the project forms a complete solution for implementation of intrusion detection, identification and tracking of targets using wireless sensor network technology.

Fingerprint based ignition and door lock

Motor vehicle keys have sometimes been inconviencing basically based on the following facts: -The keys can easilly be locked in the vehicle or misplaced,leading to the unattractive alternative of breaking the door in the former case or re modifying the ignition system in the latter case. -The vehicle can also be easily driven away by someone who manages to get access to the keys The fingerprint based ignition thefore provides a wonderful sollution to the above inconviniences. In the project a fingerprint scanner is supposed to used,preferably connected to a computer system via a usb.Integration should be done with a c++ program and connected to a mdel vehicle.
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MICROPROCESSOR BASED RAILWAY SYSTEM

corporation of computer method in railway traffic control to improve, safety, speed of handling the traffic and reliability. Here we employ the microprocessor (Intel 8085) to handle the signaling, track changing and gate operation and to monitoring the traffic. The system starts with the tracking if the train is sensed at the station side or starts with the gate operation (i.e. gate closing and opening) along with the track changing if the train is sensed at the gate side. Once the train arrival is sensed at a distance of about 3 kms the microprocessor performs the gate operation along with the track changing, the identification of the train is done at a distance of 3 kms accordingly the particular operation is performed by the processor. Depending upon the priority of the incoming train, the unengaged track is given for train halting.
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Thursday, 8 January 2009

topics

DEVELOPMENT OF HIGH-SPEED INTERCONNECT MODELS AND EFFICIENT SIMULATORS
PHOTONIC SENSOR INTERROGATION SYSTEMS
WIRELESS SECURE FENCING LINK

MULTIDISCIPLINARY COMPUTER-AIDED DESIGN/PHYSICAL SIMULATION TOOLS FOR SINGLE/MULTI-CORE PROCESSORS


FPGA BASED DESIGN OF PROCESSOR BUILDING BLOCKS
CMOS ACTIVE PIXEL SENSORS
ACTIVE ORGANIC DEVICES

DC-TO-AC CONVERTER WITH PRECISION FREQUENCY CONTROL
SOFTWARE DEFINED RADIO TECHNOLOGY
WIRELESS HEALTH MONITORING
SILICON SOLAR CELL DESIGN AND FABRICATION

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hello ,
everybody please share your project ideas here
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