GSM Controlled Robotics

In traditional methodology to find the motion of human we have some devices like video camera, radar, ultrasonic sensor etc. In case of video camera another human have to continuously monitor the video. If we use radar or ultrasonic sensor, we need a transmitter and a receiver. So these are high in cost and most of the jamming techniques are there to cheat (i.e. stealth bomber planes). But there is another interesting sensing device used to find the motion of human (i.e.) PIR (Pyroelectric Infra Red sensor). It absorbs the infrared radiation (wave length of 9.4 micro meters) from the human body and creates a corresponding signal. As it has protection devices like lenses it is less suppose to be cheated. As this is sensitive only human body heat and frequency of radiation, this sensor can be used to find human up to 3 meter to 90 meter distance (using perfect Fresnel lenses). So it helps to find human availability beyond the barriers like walls and fire etc. It can be used as earth quake rescuer. The above principle is used in this paper. A robo car which is controlled by DTMF (Dual Tone Multi Frequency) using mobile phone (CDMA & GSM) having PIR sensor on this head is used to find human motion. By using the DTMF technique we can operate the robo car from anywhere in the world using mobile phone. The mobile number of the receiver phone acting as a unique code of this DTMF circuit. By using the CDMA (Code Division Multiple Access) technique between mobiles we can do the operations more securely. Thus in military applications for searching terrorists in forest or to find them in a closed room for counting we can use this project.