The aim of this project is to design automatic robot which is capable of receiving a set of command instructions in the form of DTMF tones and performs the necessary actions. Here DTMF stands for “Dual tone multiple frequency”. And also to detect the human being by using sensors that detects the presence of the human being and indicates the user. This can be used to detect terrorists/thief inside the building.   The objective of this project is fulfilled by employing a DTMF mobile, a microcontroller, few DC motors for direction control, and an interfacing between the different modules of the project and the controller.   The project makes use of a microcontroller which acts as a central controlling unit. This module is capable of communicating with the input and the output modules. The controller makes use of a PIR based input sensor to sense the human being and give us an alert indication through a buzzer that alerts the presence of humans. We also make use of a mobile phone, which is used to control the robot. The output module is formed by the motors used for controlling the direction of the motor i.e. the forward and backward movement of the robot. The Microcontroller is programmed using Embedded C language.      

The main objectives of this project are:

1. Design of real time robot which can detect the live human.
2. DTMF control of robot directions and movement.
3. PIR based human detection and alerting.
4. To achieve this task using PIC microcontroller.

      The major building blocks of this project are:  

1. Battery Power Supply.
2. PIC Microcontroller.
3. DTMF decoder.
4. PIR Module.
5. DC Motors with driver.
6. Buzzer with driver.
7. Crystal
8. LED Indicators.
9. Reset Button.

      Software’s used:    

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

      Block Diagrm:          

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