RF CONTROL OF INDUCTION MOTORS AND OTHER INDUSRIAL LOADS

THIS PROJECT IS DESIGNED TO CONTROL EIGHT RELAYS USING RADIO FREEQUENCY AT 433MHZ RADIO MODULES COMMERCIALLY AVAILABLE. EACH RELAY CAN HANDLE UP TO 7AMPERS OF CURRENT AT 230 V AC. THIS CAN BE USED ON SEVRAL TYPES OF LOADS SUCH AS INDUCTION MOTORS ,CONTROL EQUIPMENTS,DC MOTORS MAGENTIC SOLENOIDS,ACTUATORS PUMPS DOOROPENERS.OR EVEN HOME OR IN OFFICE TO CONTROL ELECTRICAL EQUIPMENTS

REMOTE TRANSMITTER IS POWERED BY TWO AA3 PENCIL CELLS HAS LOW POWER CONSUMPTION ,CAN LAST FOR MORE THEN A MONTH. PRESENTTLY WITH TWO CELLS, THE OPERATING RANGE IS TWENTY FIVE YARDS AND IT CAN BE INCREASED VITH SUITABLE EXTERNAL ANTENNA AND 6V POWER SUPPLY AT TRANSMITTER.

I.V.R.S SYSTEM FOR INDUSTRIAL CONTROL

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

POWER GRID CONTROL THROUGH PC

GRID CONTROL/LOAD SHEDDER

HE PROJECT PRESENTED HERE IS BASED ON WORLD’S MOST POWERFUL INTEL’S MCS-51 FAMILY OF MICROCONTROLLER.THEME OF THIS PROJECT IS TO CONTROL THE POWER GRID OR FOR THE PURPOSE OF LOAD SHEDDING FROM THE IBM PC KEY BOARD.THERE IS A ACUTE POWER SHORTAGE EVERY CORNER OF THE INDIA, IT BECOMES UNAVOIDABLE , TO CUT DOUN THE LOAD FROM ONE SECTION AND SUPPLY TO OTHER SECTION ,IT CAN BE DONE LOCALLY OR THROUGH PC REMOTELY.PRESENT PROJECT DOES IT THROYGH USING PC.THIS CIRCUIT CAN BE CONNECTED TO PC THROUGH COM PORT PROVIDED. ON PC NORMALLY TWO PORTS ARE AVAILABLE COM1 & COM2 THIS CAN BE CONNECTED TO ANY AVAILABLE COM PORT, THROUGH A SERIAL CABLE ONE NORMALLY USED WITH

GSM CONTROLLED DOOR LATCH OPENER WITH SECURITY AUTODIAL-UP

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.