说明：  In the project the robot is controlled by a mobile phone that makes a call to the mobile 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 called 慏ual Tone Multiple frequency?(DTMF) tone. The robot receives these tones with help of phone stacked in the robot. The received tone is processed by the microcontroller with the help of DTMF decoder ic cm8870 . This ic sends a signals to the the motor driver ic l293d which derives the motor forward, reverse卐tc. Project is built using AVR microcontroller the ATmega16.