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GSM based Home Automation
PRIYANKA SHARMA- 1301214063
MONIKA KUMARI - 1301214083
NIRAJ KUMAR - 1301214178
1
 GSM
 DTMF
 DTMF DECODER
 LOGIC IC(AND & NOT)
 TRANSISTORS
 RELAYS
 COMPLETE CIRCUIT
2
 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
 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
6
O
U
T
P
U
T
INPUT
7
4 input
AND
Gate
4 input
AND
Gate
4 input
AND
Gate
Latch 1
Latch 2
Latch 3
Load A
Load B
Load C
A A B B C C D D
Logic Parallel Lines
MT8870 DTMF
Decoder
8
 Problem :
The output of Logic IC is of very low power
highly insufficient to operate electrical loads .
So we use relays for controlling electrical heavy
loads through Logic IC .
9
10
AC POWER
11
CompleteCircuit
 Remote controlled ROBOTS and APPLICANCES
12
 No feedback
 GSM connection for the operation
13
14

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Major project

  • 1. GSM based Home Automation PRIYANKA SHARMA- 1301214063 MONIKA KUMARI - 1301214083 NIRAJ KUMAR - 1301214178 1
  • 2.  GSM  DTMF  DTMF DECODER  LOGIC IC(AND & NOT)  TRANSISTORS  RELAYS  COMPLETE CIRCUIT 2
  • 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.  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
  • 7. 7 4 input AND Gate 4 input AND Gate 4 input AND Gate Latch 1 Latch 2 Latch 3 Load A Load B Load C A A B B C C D D Logic Parallel Lines MT8870 DTMF Decoder
  • 8. 8
  • 9.  Problem : The output of Logic IC is of very low power highly insufficient to operate electrical loads . So we use relays for controlling electrical heavy loads through Logic IC . 9
  • 12.  Remote controlled ROBOTS and APPLICANCES 12
  • 13.  No feedback  GSM connection for the operation 13
  • 14. 14