Reuse Old Mobile Phones for Home Automation

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Introduction: Reuse Old Mobile Phones for Home Automation

Hi...... Friends
we all have used old feature phones like phones with small display and keypad models. Nowadays our trend is Smart phone with huge display,4G,slim,etc. So what about those old phones.... is it a electronic waste ? well my tutorial is how to convert a old phones (screen broken,mic and speaker damaged,keypad damaged ) to control appliances in home....

Step 1: Gathering Materials

The very first step is to gather materials required for our project......

materials required
1) Old phone
2) sim card

3) DTMF module
i bought DTMF module from Flipkart

http://www.flipkart.com/exploldore-embedded-dtmf-deco...

4) 3.5mm audio jack

http://www.flipkart.com/storite-3-5mm-male-stereo-audio-cable-100cm-1m-aux/p/itme57t47pndxmsh?pid=ACCE57T4KRZXBZNJ&ref=L%3A-4743854521440383714&srno=p_10&query=3.5mm+male+to+male&otracker=from-search

5) Relay board
http://www.flipkart.com/explore-embedded-four-chan...
5) 7805 voltage regulator and a 9 volts battery

6) lamp and lamp holder
7) wires and wire cutter,snipper

Step 2: Connections

1) make a 5 volt supply using 7805 and 9 volt battery
2) next step is to power the DTMF module with 5v from 7805 output.
3) now connect 3.5mm jack to DTMF module and mobile phone

to check whether the module is working or not, press 1 button in you mobile so that D1 digital output will go HIGH i.e D1 Led should glow.

4) connect D1 output to the relay input and connect lamp holder with relay as shown in diagram



Step 3: Working

Insert sim card in the your old phone and goto settings --> call settings --> advanced settings--> answer mode and select auto answer when headset is connected .
Ring up from another phone to the old phone to which DTMF module is connected, your call will be automatically connected and now press 1 the lamp glows and press 0 to turnoff the lamp.

Step 4: Final Step

you can use any appliances like fan,air conditioner instead of lamp thus you can use your old phones to control any devices from any where in the world :D

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    16 Comments

    So the phone you are calling has to have service?

    i suppose you could get around this with an old Wifi enabled phone, then register a free Google Voice phone number. Then the only problem is making sure the area has wifi...

    i suppose you could get around this with an old Wifi enabled phone, then register a free Google Voice phone number. Then the only problem is making sure the area has wifi...

    Nice work. Next time Instead of using phone. Build a RF tx&rx to control(relay) home appliances. If possible make it.

    yup.....made it using Rf 232Mhz module but I don't have images
    https://www.youtube.com/watch?v=qd0syOxawzc

    Nice efforts. I'll give you 1 year free pro membership. check your inbox

    thank you.....now upgraded to PRO thanks a lot...!!!

    Nowadays flipkart started to sell these kind of items which is only available at eBay and hobby stores.

    what happens if I disconnect the call after press No 1