Cell Phone

CELL PHONE • • • •

The cell phone which is used for the receiving of the signal In this method we can get signal either analog or digital signal. Cell phones are long range portable electronic devices. Cell phones which are used for the communication network purpose.

DECODER It is a digital combination system. It is used for converting one form of digital code into another code. In this method we can give three bit input code and they convert into suitable eight bit code. It is a digital combination system.

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MICROCONTROLLER     

Microcontroller contains all essential on a single chip. The pins of microcontroller are programmable that is capable of having several function. It contains CPU as well as timers parallel and serial I\O and internal RAM and ROM memory. The microcontroller contains 40 pins The 10th and 11th pin which is used for the receiver and transmit the signal.

OSCILLATORS

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The oscillators are used to generate the clock pulses all internal operations. Pin No(18,19) which are providing for the clock pulses. It is made up of crystal capacitor and on-chip inverter.

STEPPER MOTOR   

A stepper motor widely used devices that translate electrical pulse into mechanical movement. Stepper motor refers to four phase and two common terminals. Based on the configuration they can rotates either clockwise and anticlockwise direction.(Truth table).

LCD    

The recent years LCD in finding widespread use replacing LED. The LCD having 14 pins, the Vcc and Vss providing +5v. The can represents to display numbers, characters and graphics. Easy of programming for the characters and graphics.

POWER SUPPLY  

The microcontroller contains +5v. The 20th pin contains the ground and the 40th pin contains the power supply.

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In the digital IC they can convert the decoder signal into digital form. The digital signal can fed through the microcontroller.

DIGITAL IC

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