Gsm based home automation

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GSM Based HOME AUTOMATION using electronic relays

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Gsm based home automation

  1. 1. GSM based Home Automation Name : Rajneesh Salgotra EnRol : 163/2010 Roll : 31 1
  2. 2.  GSM  DTMF  DTMF DECODER  MICROCONTROLLER  RELAYS  COMPLETE CIRCUIT 2
  3. 3.  Now a days , GSM services easily available to everyone .  And You need not to carry a different remote controller .  Mobile Stations are already a multipurpose devices , so why not to incorporate one more 3
  4. 4.  Dual-tone multi-frequency signalling (DTMF) is used for telecommunication signalling Between telephone handsets and other communications devices and the switching centre . 4 1209 Hz 1336 Hz 1477 Hz 697 Hz 1 2 3 770 Hz 4 5 6 852 Hz 7 8 9 941 Hz * 0 #
  5. 5. 5 1209 Hz 1336 Hz 1477 Hz 697 Hz 1 2 3 770 Hz 4 5 6 852 Hz 7 8 9 941 Hz * 0 #
  6. 6. 6
  7. 7. 7 O U T P U T INPUT
  8. 8. 8
  9. 9. 9
  10. 10.  We have the decoded Hexadecimal Number corresponding to the pressed key 10 NOW Microcontroller to take Decision .
  11. 11. 11 I R O C O N T R O L L E R
  12. 12.  Problem : The output of Microcontroller is of very low power highly insufficient to operate electrical loads . So we use relays for controlling electrical heavy loads through Microcontrollers . 12
  13. 13. 13 AC POWER
  14. 14. 14 +Vcc
  15. 15.  Remote controlled ROBOTS and APPLICANCES 15
  16. 16.  No feedback  GSM connection for the operation 16
  17. 17.  http://pdf1.alldatasheet.com/datasheet- pdf/view/77085/MITEL/MT8870.html  Mazidi, Muhammad Ali, The 8051 Microcontroller and Embedded Systems  SOLID STATE RELAY HAND BOOK  http://chipscity.com/downloads/Projects/GSM%20based%20C ontrol%20System.pdf  www.wikipedia.com  8051 MICROCONTROLLERS by SATISH SHAH 17
  18. 18. 18

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