shethia
Jun 18 2009, 11:39 PM
hie Ajay,
I m Tejas doing my final year and m planning to take up DTMF controlled circuit application for eg. a wireless robot or a door lock etc.
First of all i m newbie and dont have exact knowledge on dis.
I want to know dat will dis circuit require using two cell phones one used as a remote and the other one on the robot or will a single mobile phone used as a remote and a DTMF decoder circuit on robot work?
In the first case will i have to make calls to the other cell phone on the robot everytime for controlling it and how will d robot be den controlled??
In the latter case how will i control d robot using a single phone and a DTMF decoder?Is it something like i have to just press d number keys without actually making a call??
Can u pls pls Help me out i m really confused.
God bless you and waiting for ur earliest reply.
thanks
-Tejas
I m Tejas doing my final year and m planning to take up DTMF controlled circuit application for eg. a wireless robot or a door lock etc.
First of all i m newbie and dont have exact knowledge on dis.
I want to know dat will dis circuit require using two cell phones one used as a remote and the other one on the robot or will a single mobile phone used as a remote and a DTMF decoder circuit on robot work?
In the first case will i have to make calls to the other cell phone on the robot everytime for controlling it and how will d robot be den controlled??
In the latter case how will i control d robot using a single phone and a DTMF decoder?Is it something like i have to just press d number keys without actually making a call??
Can u pls pls Help me out i m really confused.
God bless you and waiting for ur earliest reply.
thanks
-Tejas
Ajay Bhargav
Jun 22 2009, 2:19 PM
you have to make a call, after the call is established (phone is off hook) then press the button to generate DTMF tones.
to decode these tones use MT8870 IC or similar.
to decode these tones use MT8870 IC or similar.