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

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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

 

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.

 

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?