remote control by cellular phone

Thread Starter


Joined Jun 23, 2008
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

Problem is that CM8870 does not exist in our country ..

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

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Last edited:


Joined Nov 29, 2005
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.



Joined Feb 4, 2008
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.


Joined Sep 16, 2008
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?