17-06-2014, 09:55 AM
Fig shows complete block Diagram
Fig shows complete block Diagram.doc (Size: 39.5 KB / Downloads: 21)
Display:
Display section consist of 16x2 LCD dot matrix display which is use for not blind people it is our use to conform incoming message character and brain lip character is same or not .The LCD display show in coming message on it
• Mobile decoder—
To receive mobile SMS we use mobile decoder in our project this decoder is heart of our project because this decoder receive sms and giving corresponding reading signal to micro controller for reading sms in to sim card present in this decoder. This decoder consist of sim-card tray in which sim card is inserted, Antenna, serial port etc.
• Regulated Power Supply:
For our project we req. regulated power supply of +5v and 12v this supply can obtain using step down transformer fall wave voltage Rectifier, Filter condenser and voltage regulator IC 7805.
• Crystal and Oscillator:
For internal operation of micro controller we req. to generate machine cycle for this purpose we use 12MHz crystal between pin XTAL1 and XTAL2