Watch the robot in action !!!
Working of the Robot
The robot is controlled by a cellphone that makes call to the cell phone attached to the bot while making the call .When any key is pressed control corresponding to the key pressed is heard at the other end of the call. This tone is called dual tone multi frequency tome (DTMF) robot receives this DTMF tone through the phone placed in the robot The tone is received through DTMF decoder MT8870 IC ,This IC decodes the DTMF tone in to its equivalent binary digit and this binary number is send to the motor driver L293D. which take the decision for the movement of the robot. Use the table for understanding the controls of the robot