Robotic Vehicle Controlled Over GSM Network Using DTMF Technology

Abstract

In the past years, the motion of wireless robotic vehicles has been restricted by limited distance of control, line-off site control and interference which is mainly caused by the use of Infra-Red and Radio Frequency circuits for the remote control of the robot. This project presents a solution to such problem whereby a GSM based remote control system is used to control a robotic car. This is done in such a way that to control the robot, the user makes a phone call to the phone attached to the robot which automatically answers the call. During the phone call, the user can control the robotic car with the keys on the phone by the use of DTMF tone. Hence the user can control the robotic car from anywhere no matter the distance without interference so far as the robotic car can be seen by the user. The design methodology involves four stages, namely: power supply unit, the input unit, the control unit and the output unit. The performance evaluation of the designed work after series of tests was very satisfactory.