The main objective of this system is to transmit message or text through ordinary Land Line Telephone from one end (source) to another end (designation). This is get achieved by the DTMF technology. It has two sections one for editing the text and to transmit the edited text and the other section consist for receiving the text message. The system works on the DTMF technology. (Dual Tone Multiple Frequency).
It involves several steps. They are
DTMF decoding/Encoding process
Ring sensing
ON/OFF hook detection
The above process is get achieved by the microcontroller AT89S8252.Thus Microcontroller controls the whole system.
power supply Diagram : SMS through Telephone (AT89S8252)
Block diagram: SMS through Telephone (AT89S8252)
Its innovative project could u please send me more details about this project as soon as possible
its realy cool……!could u plz send me all details of this projectas early as possible.again congrats for making such good project..!
Hi, Im intrested in this project please could sent me more details..
if u kindly send me ckt description as soon as possible that will b great for me.