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This article is presented by:HAWARE SHREYAS SURESH
KADAM SUJATA HANUMANT
MALI SWAPNIL DILIP
EYE ON A CELLPHONE-OPERATED LAND ROVER
ABSTRACT:
Our project name is “EYE ON A CELL-PHONE OPERATED LAND ROVER”. In this name ‘EYE’ stands for wireless camera which is placed on robot and ‘LAND ROVER’ stands for vehicle which can move along the surface.
In this project robot is controlled by cell-phone that makes a call to the cell-phone attached to the robot. In the course of a call if any button is pressed a tone corresponding to the button pressed is heard at the other end of the call the tone is called dual-tone multiple/frequency (DTMF TONE) the robot perceives this DTMF tone with the help of the phone stacked in the robot.
The received tone is processed by the ATmega16 microcontroller with the help of DTMF decoder MT8870.The decoder decodes the DTMF tone into its equivalent binary digit and this binary number is send to the microcontroller. The microcontroller is preprogrammed to take a decision for any given input and out-puts its decision to motor drives in order to drive the motor for forward or backward motion or a turn.
INRODUCTION
In this project robot is controlled by cell-phone that makes a call to the cell-phone attached to the robot. In the course of a call if any button is pressed a tone corresponding to the button pressed is heard at the other end of the call the tone is called dual-tone multiple/frequency (DTMF TONE) the robot perceives this DTMF tone with the help of the phone stacked in the robot.
The received tone is processed by the ATmega16 microcontroller with the help of DTMF decoder MT8870.The decoder decodes the DTMF tone into its equivalent binary digit and this binary number is send to the microcontroller. The microcontroller is preprogrammed to take a decision for any given input and out-puts its decision to motor drives in order to drive the motor for forward or backward motion or a turn.
The mobile that makes a call to the mobile phone stacked in the robot acts as a remote. So the simple robotic project does not require the construction of receiver and transmitter unit.
DTMF signaling is used for telephone signaling over the line in the voice-frequency band to the call switching center. The version of DTMF used for telephone tones dialing is known as ‘touch-tone’.
DTMF assigns specific frequency to each key so that it can easily be identified by the electronic circuit. The signal generated by the DTMF encoder is a direct algebraic summation, in real time, of the amplitudes of two sine(cosine) waves of different frequencys,i.e.,pressing ‘5’ will send a tone made by adding 1336 Hz and 770 Hz to the other end of the line.
