Home Automation By DTMF

" Home Automation By DTMF"

        Switch board Now in Your Pocket.

We use many different types of communication in control applications to control home appliances, industrial appliances, and other type of automation. There are two types of communication that is we generally use - one is wired and other one is wireless. In wireless communication we transmits signal wirelessly, like using radio frequency (RF) and in wired communication in which we uses wires like copper wire. In this project “Home Automation By DTMF” we are going to control our home appliances wirelessly. Other important feature of this project is, that we are going to use  microcontroller in it.

Required Components:

 1. Arduino Uno R3...... 1
2. MT8870 DTMF Module .... 1
3. 4 Channel Relay Module... 1
4. Mobile Phone..... 1
5. Jumper Wire...... 12
6. Ac load..... 4
7. 3.5 Audio Jack.... 1
8. 9V battery...... 1
9. Others

Circuit How To Working:

Home Automation By DTMF project works over mobile DTMF technology that exists in Dial tone. DTMF stands for Dual Tone Multiple Frequency. There are some frequencies that we used to create DTMF tone. In simple words by adding or mixing two or more frequencies generates DTMF tone. These frequencies are given below:

In Given figure we can see two groups of different frequencies. When one upper and one lower frequencies mixed then a tone is created that tone we calls Dual Tone Multiple Frequency. In this project we control ac appliances by pressing dial pad keys like 1, 2, 3, 4, 5 and more.

 Here we have connected a cell phone using aux wire to the DTMF decoder circuit. Before explaining the further working of project we need to know about the output of DTMF decoder for every key pressed.

 

 

 

Circuit Diagram and Explanation:

 Circuit diagram for Home Automation By DTMF project is shown above. In this circuit we have used a DTMF decoder namely MT8870 DTMF Module which converts dial pad tone into the four bit digital output. LIGHT, FAN , TV & others are connected to Q1,Q2 and Q3 of DTMF decoder IC through a relay driver namely $ Channel Relay module are used for controlling LIGHT, FAN ,tv & others. 

Let's Make  IT: 

We are connected are 4 AC Load Like That.

 

 Our Arduino Code:
Download from Here

DOWNLOAD

IF You are not understand in my picture .you can see my full tutorial video.

Thank you everyone.
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