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kg300
Joined: 21 Sep 2007
Posts: 15
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 29 Jun 2008 20:45 Control 12Volt rellay with a cell Phone |
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Hello everyone,
I need a circuit to control a 12Volt rellay with a cell phone. Please anyone give me the idea. Please also tell me that where i can get the control signal from cell phone to turn on the circuit (rellay circuit).
Thanks
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vikrambgholap
Joined: 30 Jun 2008
Posts: 6
Helped: 1
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| 30 Jun 2008 12:47 Re: Control 12Volt rellay with a cell Phone |
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| u want to control remotely? Do u have 2 phones?
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matbob
Joined: 15 May 2008
Posts: 5
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| 30 Jun 2008 19:47 Re: Control 12Volt rellay with a cell Phone |
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Ofcourse you can do it if you have 2 cellphones. Make a call from one phone to the other and you must have some auto answer facility on the latter. Now when you press any key on the first phone you can hear a DTMF signal (corresponding to the key you pressed) on the second phone. You may tap the earphone/headset output of the second phone and decode the DTMF signal using a DTMF decoder or a microcontroller.
I haven't experimented this yet and is trying to do a similar project. Wish you good luck!
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Davood Amerion
Joined: 01 Mar 2005
Posts: 587
Helped: 90
Location: Persia
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| 30 Jun 2008 22:26 Control 12Volt rellay with a cell Phone |
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With SMS feature you can control any external hardware. This capability come from some type of cell phones which has serial port capability.
regards davood.
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kg300
Joined: 21 Sep 2007
Posts: 15
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| 06 Jul 2008 5:17 Re: Control 12Volt rellay with a cell Phone |
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| Thanks very much
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