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Transcript of dtmf ppt
HOME APPLIANCE HOME APPLIANCE CONTROL SYSTEM CONTROL SYSTEM HOME APPLIANCE HOME APPLIANCE CONTROL SYSTEM CONTROL SYSTEM
Supervised By:
Ms Swati vyas HOD OF ECEMACET, KOTA
Submitted by :
Umesh Chandra08EPSEC050Batch : EC 3
based
What’s coming in next 5 mins.
• Introduction
• Technology used
• Possible Applications
• Future Planning
• Suggestions and Queries Session
What is HACS?
• Home Appliance Control System accessed by a remote device such as mobile phone or a palm-top to allow a home owner to control, monitor and coordinate home appliances.
Why HACS ???
When: you are in a traffic jam on the highwayWhat: You set microwave oven in a slow cooking mode
Slow cooking mode
1. Saves time2. Save money (Long run)3. Self Maintenance4. Security5. Makes life easy
Temp Controller
Microwave
Security System
Cellphone, Laptop, PDA
Server or HACS System
Overview of HACS System
Database
Accessing It• Input device • User Interface – Login, Initial Settings,
Operations, Logout
Technology used
• Call your host mobile.• Once call is connected with each key press user can
control predefined applications.• Example toggle your AC On and Off by pressing key 1.
Cell Phone GSM chip
Micro controller
Appliances
Send message
Send status
Issue command
Send completion status
•Decode incoming message•Send instruction to appliance
•Monitor completion status
•Communicate with network•Transfer data to microcontroller
•Send text message
•Receive statusmessage
Send message
Send status
Security System
Garage DoorFan
Lamp
Perform required instructions
What’s inside black box• Black box consists of DTMF
decoder and relay circuits for integrating it with household circuits
• Technology used in interactive voice response system (IVRS) i.e. the customer care centre.
• DTMF stands for dual tone multiple frequency
• Every key of telephone is associated with a tone comprising of frequencies from two groups viz. low freq. and high freq. group.
• DTMF_Decoder.wav
What we have done• Designed DTMF
decoder circuit which consist of three parts:-
i. DTMF to BCD decoder
ii. BCD to 1 of 12 decoder
iii. Relay circuit controlling
• We have implemented this for controlling
i. Controlling four motions of robot
ii. And controlling household devices
• IC-CM8870• IC-74LS138• IC-CD4013• IC-7805(Regulator)• RELAYS• TRANSISTOR-BC547• LEDS• CRYSTAL-35795MHZ• TRANSFORMER• DIODE(1N4007)• RESISTANCE• CAPACITOR• POWER SUPPLY
ARRANGEMENT
BLOCK DIAGRAM OF THE CIRCUIT
CIRCUIT DIAGRAMCIRCUIT DIAGRAMCIRCUIT DIAGRAMCIRCUIT DIAGRAM
• This is the front end user interface for decoding the DTMF signals.
• When any DTMF audio file is sourced to it then…
• GUI showing the decoded DTMF signals
• For key pressed with more than 1sec delay are considered new world
• Lighting and Appliance control
• Security systems & Access control
• Entertainment Systems
• Communication systems
• Wireless radio control
• Mobile wireless robot control
• Reporting during car accidents
• Almost Anything Else you can think of
Future planning cont.
• In coming days we will be completing the full software
• With dedicated IVRS response and fully automatic real time DTMF decoding.
• And your PC will be connected to your appliances as peripherals.
• And we can control our house by interacting with audio stored in PC
Thank YouThank You
Any Questions???Any Questions???
Thank YouThank You
Any Questions???Any Questions???