GSM BASED HOME AUTOMATIONUNDER THE GUIDANCE OF Mr . DASARI NAGARAJU BY P.B.VINAY KUMAR (09W11A0439) N.NIRANAJAN REDDY (09W11A0426) K.RAM PRASAD (09W11A0432) T.SRINIVAS (09W11A0436) 2 .INTRODUCTION Here is a circuit that lets you operate your home appliances like lights and water pump from your office or any other remote place. BLOCK DIAGRAM 3 . POWER SUPPLY 4 . MICRO CONTROLLER 8051 is a big family of microcontrollers. The AT89S52 is a low-power. The device is manufactured using Atmel’s high-density nonvolatile memory. The device which we used in our project was the 'AT89S52' which is a typical 8051 microcontroller manufactured by Atmel. highperformance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. 5 . Pins 10-17 are Port 3 Pins 18 &19 – Crystal (XTAL) Pin 20 – GND Pins 21-28 are Port 2 Pins 32.PIN CONFIGURATION Pins 1-8 are Port 1 Pin 9 is RST.39 are port 0 Pin 29 – PSEN Pin 30 – ALE Pin 31 – VPP 6 . . then two frequencies of corresponding row and column adds . 697hz + 1209hz = 1906hz 7 . i.DTMF If we press 1 .e. The other wire can be attached to any one of two signal terminals. 8 .5 MM EARPHONE JACK Ground Signal One wire comes from the ground terminal of the jack that is connected to common ground of the complete circuit .3. and the correct tone code (DTMF) digit is transferred. 9 . Direct Voltage becomes high. o When input signals are recognized to be effective.DTMF DECODER o The HT9170B/D tone decoders consist of three band pass filters and two digital decode circuits to convert a tone (DTMF) signal into digital code output. RELAY DRIVER ULN 2003 o ULN stands for Universal Logic Network o ULN is mainly suited for interfacing between low-level circuits and multiple peripheral power loads 10 . RELAY A relay is an electrical switch that opens and closes under the control of another electrical circuit. In the original form. the switch is operated by an electromagnet to open or close one or many sets of contacts. 11 . KIT OVERVIEW 12 . WORKING 13 . ADVANTAGES Home automation using mobile phone For elderly and disabled in order to maintain their independence and safety. Home security Low cost and reliable system 14 . 15 .APPLICATIONS • Central office • Industry Automation • Remote control • Remote data entry When :You are in traffic jam on the high way What : You set microwave in slow cooking mode. 16 . Presence of every module has been reasoned out and placed carefully thus contributing to the best working of the unit. Integrating features of all the hardware components used have developed.CONCLUSION The project “GSM BASED HOME AUTOMATION” has been successfully designed and tested. FUTURE ASPECTS This product is aimed toward average consumers who wish to control household appliances remotely from their cell phones provided that the appliances are electrically controllable Right now we have designed the project for control of two devices but it can be designed for more number of devices . A feedback system can also be included which provides the state of a device(whether it is on/off) to the remote user. 17 .It can be further expanded with a voice interactive system facility. ANY QUERIES ??? 18 . 19 .