remote control by cellular phone

Discussion in 'General Electronics Chat' started by srmed2000, Sep 15, 2008.

  1. srmed2000

    Thread Starter New Member

    Jun 23, 2008
    9
    0
    Hello !!! Can you help me
    .I need an electrical circuit for remote control by cellular phone
    I Have a small car and I want to do I manage the movement of the car, through mobile
    Are there ideas
    ??????????????​

    Each key in the cellular telephone issued different tone. Can we convert it to orders
    ??????????????​

    [​IMG]
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    Problem is that CM8870 does not exist in our country ..

    Is the design draws no other alternative to this design ???????
    Helpe me please !!!!!!!!!!!!!!!!!

    Look at :::::::
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    Last edited: Sep 15, 2008
  2. Externet

    AAC Fanatic!

    Nov 29, 2005
    758
    57
    Am almost sure cellular telephones do not emit DTMF tones.

    Your circuit would then be useless unless used from a landline. The DTMF decoder chip is abundant anywhere in old answering machines and cordless telephones, easily canibalizable.

    Miguel
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    You cant use a phone to control the movement of the vehicle. Indeed you can use a phone to start remotely a machine by sensing the sound out of its speaker or the vibration. You can also stop it.
     
  4. FunkiiMunkii

    Member

    Sep 16, 2008
    12
    0
    I guess it is possible to audibly send a digital signal through the phone, but I think the solution would be somewhat complex considering the availability of better options. Have you considered using RF (Radio Frequency) modules instead to transmit signals to control the car?
     
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