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Generally, appliances used in our home are controlled with the help of switches. These days, you can see many technologies used in home automation projects. his article presents the controlling of home appliances using DTMF technology

The main principle of this circuit is to control appliances like light and fan using DTMF technology. DTMF encoder is present in your mobile and decoder is HT9107B IC. Mobile jack is connected at 1nf capacitor. Mobile jack consists of two wires (Red and black). Red wire is connected to the decoder IC and Black is grounded. When a button is pressed from mobile it generates a tone which is decoded by the decoder IC and it is sent to ATMEGA8 controller. Controller then checks for input and it produces the output according to the code written to it.


Hardware


S. No
Part
Quantity
1.
DTMF Module
1
2.
Relay
4
3.
BC 547
4
4.
7805 IC
1
5.
Bulb Holder
4
6.
Bulb
4
7.
Some Other Components



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DTMF Based Home Automation

  • Product Code: DBHA
  • Availability: In Stock
  • ₹3,000.00


Tags: DTMF, Home Automation