SMS through Telephone with AT89S8252


Posted on Dec 16, 2012

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).


SMS through Telephone with AT89S8252
Click here to download the full size of the above Circuit.

It involves several steps. They are DTMF decoding/Encoding process Ring sensing ON/OFF hook detection Displaying the message in LCD The above process is get achieved by the microcontroller AT89S8252.Thus Microcontroller controls the whole system.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Locked Loop Synchronous Demodulator
Ten-step voltage-level indicator
Wideband Active Rod Antenna
6.9 GigaHertz Chrono PC-based
IR Demodulator
Power amplifier for Loudspeaker 6.5W 8R circuit
Low-Power Car/Bike USB Charger
rf module interfacing with spartan 3an fpga
CRT final video driver amplifier



Top