07-02-2012, 04:43 PM
MAKING OF MOBILE PHONE OPERATED ROBOT
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Manually Operated Robots
Radio Frequency control
Infra Red control
Mobile Phone
DTMF Tones
Dual Tone Multi Frequency q y(DTMF) tone is the signal to the network
center that is generated when you press any key of your telephone
With DTMF, each key you press on your phone generates two
tones of specific frequencies.
So a voice can't imitate the tones.
one tone is generated from a high-frequency group of tones
and the other from a low frequency group.
