KEYPAD ALARM | |||||
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| This versatile little alarm can be used as a stand-alone alarm system for your home, commercial premises or car and also forkeypad door entry. Or it can be incorporated into a larger main alarm system if required. and options are set. for example, when Keypads are often used in security systems since they avoid having to use a key or remote control, both of which can be lost or copied. Keypads are also widely used in commercial buildings to allow access through doors. Here we are presenting a stand-alone keypad alarm system which, with the addition of a siren, a passive infrared detector and door switches, will provide a basic security system for the This versatile little alarm can be used as a stand-alone alarm system for your home, commercial premises or car and also for keypad door entry. Or it can be incorporated into a larger main alarm system if required.home, office, church or hall. Installed in a car, the keypad alarm can incorporate an engine immobiliser, as well asstandard burglar alarm features. to use the system, a number is entered in using the keypad. If the entered number is correct, the unit will respond accordingly and either arm or disarm itself and operate a door lock release, if connected. exactly how the keypad alarm responds depends on the application and how the timer and options are set. |
POWER HOUSE MONITORING | |||||
| Power house monitoring is done on the receiver part fitted with lcd.Following parameters monitored are ,high voltage,over load, novoltage or temperature high.,these paremeters are transmitted by transmitter .audio and visual alarm comes on both the places ,alarms have to be reset from both the places.receiver will also display the alarming condition.these conditions also logged on to pc through serial port. | ||||
This radio controll robo is designed for spying purpose in the enemy area .It has all the control like normal car, self powered through rechargable battery ,stops instantly when stop applied , moving in both the direction turning left and right speed control through pwm.Laser gun for firing purpose wireless camera is installed, sends contineusly audio and video can be monitored on any tv. remotely controlled by looking at remote tv through radio remote control (camera not shown in picture ).forward and reverse bumpers are provided,.robo stops instantly in case of bump.saving battery power.
PAIN MONITOR | |||||
| | A patient welfare logger that also has applications for other occasional event logging requirements, as in sailing, golfing or wildlife watching, There is a need for a "pain meter" in modern hospital practice. This meter needs to prompt the patient to record an assessment of their pain and store this information for downloading. This would help in research into pain relief after surgery. Pain is a subjective experience and its perception will vary from patient to patient. It is subjective. Pain in humans is difficult to measure. However, it is still important to measure. | ||||
AUTO ANSWERING WITH SECURITY DIAL-UP | |||||
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This project is based on Atmel 89c51 Microcontroller . As name stands for, it works like an auto answering machine as well as security supervisor for your house or office. You can record 30 second message for answering, so whenever any incomming call comes, device will play your recorded message and disconnect the phone after the message is over. This features is there in all the auto-answering Machines.Microcontroller is also connected with two sensors, fire and inturder, an case if any of the sensor get triggered, it will trigger the emergency message stored into speech ic and diales out the previously stored number and deliver the emergency message. Device can dialout upto eight telephone numbers for pre deternined number of times. these numbers are stored at programming time and cannot be modified by the user. Since the speech ic used in this circuit has only 60 second recording storage ,we cannot take the incomming messages,as done in auto answering machine commercially available, uses 30 min cassette recorder & has enough storage to store incomming messages . we can add multtiple different types of sensors. cost will vary based on the number of sensors and no of telephone number storage. | |||||
AUTOMATIC CONTROL OF UNMANNED RAIL GATE | |||||
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| WE READ NEWS PAPERS VERY OFTEN ABOUT THE RAILWAY ACCIDENTS HAPPENING AT UN ATTANDED RAILWAY GATES. PRESENT PROJECT IS DESIGNED TO AVOID SUCH ACCIDENTS IF EMPLEMENTED IN SPIRIT. |
AUTOMATIC INTELLIGENT TOLL -TAX | |||||
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| THIS PROJECT IS DESIGNED TO MAKE UNATTENDED AUTOMATIC TOLL TAX STATIONS AT CHECK BARRIERS OR OCTRI CHCK POSTS AUTOMATIC TOLL TAX PROJECT IS DESIGNED ,USING ATMEL89C51 MICROCONTROLLER . HEART OF THE PROJECT IS AN IR TRANSMITTER AND RECEIVER MODULES .THESE STRONG POWERFULL MODULES ARE BASED ON 36KHZ IR BEAM CONTINEUSLY TRANSMITTED HAS A RANGE OF MORE THAN 15 FEETS ARE SUFFICIENTLY ENOUGH FOR OUR PROJECT. WE HAVE TO MAKE COIN BOX EXACTLY SAME AS USED IN PCO COIN BOX MACHINE FIXED ON RAILWAY STATION OR ELSE WHARE. WE HAVE TO MAKE TWO COIN SIZE HOLES ONE FOR ONE RUPEE, AND OTHER FOR FIVE RUPEE COIN. YOU HAVE TO FIXUP COIN SENSORS ON THESE HOLES TWO SENSORS SHOULD BE FIXED FOR FIVE RUPEE COIN AND ONE SENSOR FOR ONE RUPEE COIN. MOUNTING OF THE SENSORS SHOULD BE DONE AS SHOWN ABOVE . THE DEVICE SPEAKS PLEASE INSERT FIVE RUPEES COIN OR PLEASE INSERT ONE RUPEE COIN DEPENDING UPON THE SIZE OF THE VEHICLE ALSO KEEP RECORD OF THE VEHICLE AND SAME IS DISPLAYED ON LCD. |
BILGE OIL WATER SEPARATOR | |||||
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| BILGE OIL WATER SEPARATOR IT IS MENDATORY FOR ALL THE VESSELS OPERATING AT SEA TO HAVE THIS PLANT ON BOARD,FAILED TO DO SO, ATTRACTS HUGE PANALITY EVEN CAPITAL PUNISHMENT INTERNATIONALY. THERE IS OFTEN SPILLAGE OF WATER AND OIL IN THE ENGINE ROOM BILGES AND REQUIRE EVACUATTION OR DRAINING OUT WHEN THE BILGES ARE FULL. SHIPS ARE NOT SUPPOSED TO PUMP OUT OIL OVERBOARD, IS INTERNATIONALLY BANNED,HAVY PANALITY IS EMPOSED IF DONE SO,SINCE THIS SPOILS ENVIORNMENT AND LIFE AT SEA BOTH FOR HUMAN AND WATER ANIMALS. PROJECT PRESENTED HERE IS BASED ON WORLD’S MOST POPULAR 8051 FAMILY OF MICROCONTROLLER,ATMEL 89C51.PORT 1 IS USED AS INPUT PORT WHERE SWITCHES AND ALL THREE SENSORS ARE CONNECTED. PORT 0 IS USED AS OUTPUT PORT FOR ALL INDICATION PURPOSES IC LS 245 IS A INDICATION LED DRIVER. PORT 2 IS ALSO AN OUT PUT PORT WHICH DRIVER ALL RELAYS AND BUZZER CIRCUIT. OPERATION: THE PLANT OPERATES IN TWO MODES , MANNUAL MODE AND AUTO MODE. MANNUAL MODE:- WHENEVER ENGINEER ON WATCH OBSERVE THAT WATER IN THE BILGES IS FULL CAN START THE PLANT WITH PRESSING START PUSH CONNECTED ON PORT P1.0 . SPDT RELAY K3 WILL ENERGISE THROUGH IC ULN2803 PIN NO 15 AND PUMP MOTOR WILL START.SAME TIME ,SPDT RELAY KI WILL ALSO ENERGISE AND OPEN SOLENOID VALVE A,WHICH IS AN OVERBOARD VALVE AND WATER WILL BE THROWN OVERBOARD. SAMPLE OF THIS WATER IS SEND TO OIL SENSOR . DUE TO PUMPING OUT PROCESS , LEVEL OF BILGE WATER WILL GRADUALLY GO DOWN AND OIL WILL REMAIN, SINCE SAMPLE OF THIS IS ALSO SENT TO OIL SENSOR .THE OIL SENSOR REMAINS INACTIVE TILL THE TIME WATER IS FLOWING .THE MOVMENT IT SENSES OIL ITS OUT PUT CONNECTED TO P1.3 WILL GO LOW AND SOLENOID A WILL CLOSE AND SOLENOID B WILL OPEN AND ALL THE OIL WILL GO TO WASTE OIL TANK AT THE SAME TIME BUZZER WILL ALSO SOUND FOR ONE MINUTE SO THAT DECK OFFICER ON DUTY CAN SEE THAT THERE IS NO OIL SPILLAGE OVERBOARD. SINCE THE PLANT IS WORKING IN MANNUAL MODE, AN ENGINEER ON WATCH IN ENGINE ROOM HAVE TO KEEP MOINTORING THE BILGE LEVEL AND IS SUPPOSED TO STOP THE PUMP MANNUALLY BY PRESSING STOP PUSH CONNECTED TO P1.0. AUTO MODE :- IN OUTO- MODE ,TWO LEVEL SENSORS KEEP MONIRORING THE LEVEL WHENEVER BILGE LEVEL COMES UP THE PLANTS STARTS AND THE REMAINING PROCESS IS SAME AS MANNUAL MODE, AND WHEN THE BILGE LEVEL COMES DOWN THE PLANTS STOPS. AUTO MODE IS SWITCHED ON BY PRESSING AUTO MODE SWITCH CONNECTED TO P1.2. OIL SENSOR WORKS ON OPTOMETRIC PRINCIPAL ,WHEN THERE IS WATER FLOWING THROUGH THE OIL SENSOR CLEAR LIGHT FALLS FROM LD2 TO LDR1 ITS RESISTANCE REMAINS LOW AND TRANSISTER T1 REMAINS IN CUT OFF STATE AND P1.4 REMAINS HIGH. THE MOVMENT OIL ENTER INTO SENSOR, THE LIGHT INTENSITY FALLING ON LDR REDUCES AND TRANSISTER TI CONDUCTS COLLECTOR VOLTAGE FALLS LOW AND PI.4 BECOMES LOW. VR1 PRESET IS TO ADJUST THE SENSIVITY OF OIL WATER RATIO. WATER SENSOR TRANSISTER GETS BASE VOLTAGE THROUGH WATER WHEN BOTH PROBES ARE IMMERSED IN WATER, TRANSISTER BASE GETS VOLTAGE AND IT CONDUCTS COLLECTOR VOLTAGE FALLS LOW, AND RESPECTIVE PORT PIN BECOMES LOW. CIRCUIT IS DRIVEN BY 12V AC TRANSFORMER CONNECTED TO PCON1 DIODE D1-D4 FORMS BRIDGE CIRCUIT CI ,C2 ARE FILTER CAPACITORS IC 7805 IS 5V REGULATOR IC TO GIVE STABLISED SUPPLY TO MICROCONTROLLER. D5 IS A POWER INDICATION LED. CRYSTAL GIVES THE NECESSARY CLOCK TO MICROCONTROLLR. IC ULN 2803 IS RELAY DRIVER IC. RESISTANCES CONNECTED TO INDICATION LEDS ARE CURRENT LIMITING RESISTORS. COMPLETE DETAILS FOR ALL THE ICS USED IN THIS PROJECT ,REFER TO MENUFACTURERS DATASHEETS SUPPLIED ALONG WITH THIS PROJECT OR FREE DOWNLOAD FROM THEIR WEBSITE. INTEL HEX CODES BILGE OIL WATER SEPARATOR :1001000075813075A000D2A530970530967180F8C2 :100110001201CF2097F2D2A231C9754105314BC2ED :10012000A5D2A475401931BAD540FBC2A2754019B9 :1001300031BAD540FBC2A32096FD1201CF2096F71D :100140007541053165D2A5C2A480B5C2A0C2A2D2B4 :10015000A1D2A31201DBC2A1C2A3D2A21201D5D5A2 :1001600041E9C2A222C2A1C2A2D2A0D2A31201DB43 :10017000C2A0C2A3D2A21201D5D541E9C2A22212C5 :1001800001CF209683D2A231C9754105314BC2A55A :10019000D2A475401931BAD540FBC2A275401931BD :1001A000BAD540FBC2A32097FD1201CF2097F77567 :1001B00041053165C2A4D2A5210090014D31DEC2B6 :1001C000A390029A31DED2A32290271031DE229032 :1001D000138831DE229007D031DE22900064754210 :1001E000C8000000D542FA1582E582B4FF021583EB :1001F000458370EA220000000000000000000000BB :00000001FF |
L.C.F Meter | |||||
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THIS simple PIC-based unit was Using the formula of values are known, the third can be readily calculated. For instance, if C and F are known, then L can be calculated .designed to measure and display the values of inductors and capacitors. As a by-product of the technique used, it can also display the frequency of an external 0V/+5V signal source. The ranges are approximately: Capacitance:1pF to 6500 F Inductance: H to 10H Frequency:0·05Hz to 5MHz
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Induction loads like heavy induction motors are widely used in the industries and 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.
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| This is microcontroller 8051 based code lock system which is operated by 4x3 matrix keyboard. If the user enters the correct password it opens the lock. Or if an unauthorized user tries to open with hit & try method, after three wrong tries it starts an siren & dials out the preprogrammed number to destination required & delivers the security message. The siren can only be stopped by entering the known password again, otherwise it will continue. |
HOTEL POWER MANAGEMENT | |||||
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| 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. | |||||
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| 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.
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Electronic eye 89c51 | |||||
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| 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. | |||||
MINI LCD SCOPE | |||||
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| The MINI LCD SCOPE is a handy little item of test gear and of benefit to anyone’s workshop. Using an alphanumeric liquid crystal display (LCD), it is basically a signal tracer, but one with the great advantage that it shows a representation of the signal waveform that is being raced. This is shown across eight of the LCD character cells and is a real-time trace of the monitored waveform. Not only that, the display also shows the frequency of the signal being monitored, and its peak-to- peak voltage. The frequency range covered is basically for audio, but frequencies well to either side of this range can be traced. Several ranges of control are offered by switch selection, covering the sampling rate, and synchronization on/off for the ‘scope display. The signal input is switch able to provide different maximum peak voltage monitoring ranges. Selection of AC or DC input is provided. | ||||
Electronic eye with dialup | |||||
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| Electronic Eye:- 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 | |||||
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| 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) | |||||
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| SECURTY 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 )FROM THIEF, AN INTURDER. 2) FROM FIRE, SO WE USE FIRE SENSOR.3) WATER SPILAGE /OVER FLOW, SO WE USE WATER SENSOR. 4) GAS LEAK , WE USE GAS SENSOR, WHEN EVER THERE IS SECURITY BREACH FROM ONE OF ABOVE OR ANY COMBINATION OF ABOVE. THE PROJECT TAKES THE FOLLOWING ACTION .1) SOUNDS AN SIRON TO ATTRACT YOUR OR PUBLIC ATTENTION . 2) 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. THE PROJECT PRESENTED HERE IS BASED ON WORLD’S MOST POWERFUL INTEL’S MCS-51 FAMILY OF MICROCONTROLLER ATMEL AT89C51. OPERATION: AFTER THE USER START THE SYSTEM BY PRESSING SW1 TO SWITCHON THE SYSTEM. SYSTEM START MONOTORING ALL FOUR SENSORS. PORT0.0 TO PORT0.3 THESE FOUR LINES ARE CONNECTED WITH OUR FOUR SENSORS. WHENEVER ANY SENSOR GET ACTUATED THE PERTICULAR PIN WILL BECOME LOW AND FOLLOWING WILL HEPPEN:- 1)P2.7 WILL GO HIGH ,TRANSISTER T3 WILL BECOME ON AND RELAY RL2 WILL SWITCH ON 12V POWER FOR SOUND SECTION. 2)P2.6 WILL BECOME HIGH AND M1 ON API8208 WILL BECOME HIGH SIRON WILL BE PLAYED THROUGH SPEAKER FOR THIRTY SECONDS. 3) IF THE USER DO NOT PRESS SW2 RST SWITCH BEFORE THIRTY SECONDS 4) P2.6 WILL BECOME LOW AND THE SIRON WILL STOP. 5) P2.5 WILL BECOME HIGH AND EMERGENCY MESSAGE WILL START SINCE M2 WILL BECOME HIGH. 6) P2.0 WILL BECOME HIGH AND OFF- HOOK RELAY WILL OPERATE THROUGH TRANSISTER T1 BC 548. THIS IS EQUIVALENT TO LIFTING THE HANDSET FROM THE RECEIVER. 7) AFTER 5 SECONDS P2.4 WILL BECOME HIGH AND TRANSISTER T2 WILL BECOME ON GIVING TWO SECOND DIAL PULSE ON THE TELEPHONE CIRCUIT ON THE REDIAL POINT 8) PRESTORED NUMBER WILL BE DIALED OUT. WHEN THE RECEIVER LIFTS THE HAND SET HE WILL GET THE EMERGENCY MESSAGE. THE MESSAGE WILL BE PLAYED FOR 30 SECONDS AND IT WILL STOP 9) OFF HOOK RELAY WILL DE-ENERGISE. 10) RELAY RL2 WILL BECOME OFF 11) THE PROCESS 1 TO 10 WILL BE REPETED UNTILL RESET IS PRESSED SENSORS: A)SMOKE SENSOR IS BASED ON OPTOMETRIC PRINCIPLE WHEN NO SMOKE IS PRESENT CLEAR LIGHT FALLS ON LDR ITS RESISTANCE REMAINS LOW AND TRANSISTER REMAINS IN CUTOFF STATE. COLLECTOR REMAINS HIGH.WHEN SMOKE IS PRESENT LIGHT GET OBSTRUCTED BY SMOKE RESULTING INCREASE IN LDR RESISTANCE TRANSISTER GETS ENOUGH CONDUCTING VOLTAGE AT ITS BASE AND BECOMES ON ,COLLECTOR VOLTAGE DROPS TO LOW IS AN INPUT TO MICROCONTROLLER PORT PINS. SENSITIVITY CAN BE ADJUSTED USING VR1 VARIABLE REGISTER. B) WATER SENSOR :-WHEN BOTH PROBES ARE EMMERSED IN WATER BASE GET ITS BIASING VOLTAGE THROUGH WATER AND TRANSISTER CONDUCTS, MAKING COLLECTOR LOW C) STRONG IR TRANSMITTER AND RECEIVER IS USED AS INTURDER SENSOR .AN IR INVISIBLE 36KHZ S BEAM IS SUFFICIENTLY AMPLIFIED IN TX MODULE WHEN THE RECEIVER CONTINEUSLY RECEIVE IR BEAM ITS OUT PUT IS HIGH. WHENEVER THIS BEAM IS OBSTRUCTED A LOW PULSE IS OUTPUT & IS CONNECTED TO MICROCONTROLLER SENSOR INPUT PIN . IR RANGE IS 15 TO 20 FEET. D) GAS SENSOR 'S ELECTRONIG CIRCUITORY GIVES LOW OUT PUT WHENEVER GAS IS DETECTED.
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| 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 can be added with additional cost add rs. 1000/- to the project cost for auto dialer function. | |||||
SIX CHANNEL PETROCHEMICAL FIRE MONITORING AND CONTROL STATION | |||||
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| 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) | |||||
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,
