This document describes a cell phone controlled robotic vehicle. The robotic vehicle is controlled by DTMF commands sent from one cell phone and received by another cell phone mounted on the robot. The commands are decoded and sent to a microcontroller which controls DC motors to move the robot. Key components include an 8051 microcontroller, DTMF decoder, motor driver, batteries, and a robot body. The robot can be controlled remotely via cell phone and has applications in military, search and rescue, and scientific uses.

1. Cell Phone Controlled Robotic
Vehicle

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Cell Phone Controlled Robotic Vehicle
Introduction
 The project is designed to develop a robotic vehicle that is controlled by a cell
phone. DTMF commands from a phone are sent to another cell phone which is
mounted on the robot. These commands are fed to a microcontroller of 8051
family to operate the vehicle movement through motor interface.

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Cell Phone Controlled Robotic Vehicle
Block Diagram

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Cell Phone Controlled Robotic Vehicle
Hardware Components
 8051 series Microcontroller
 Crystal
 DTMF Decoder IC
 Motor Driver IC
 DC Motors
 Batteries
 Robot Body

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Cell Phone Controlled Robotic Vehicle
Software
 Keil compiler.
 Language: Embedded C or Assembly.

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Cell Phone Controlled Robotic Vehicle
Circuit Diagram

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Cell Phone Controlled Robotic Vehicle
Functionality
 Send commands from one cell phone to be received by another cell phone.
 Mounted on the robot to receive the DTMF (Dual Tone Multi Frequency)
mode commands.
 Which are then decoded by a DTMF decoder.
 The corresponding codes are then fed to a microcontroller.

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Cell Phone Controlled Robotic Vehicle
 Microcontroller are programmed to recognize those codes to operate 2nos DC
motors through motor driver IC.
 It commands for any direction movement as per the sent commands from
sender’s mobile.
 The motors are controlled using motor driver IC which is interfaced to the
microcontroller.
 It uses microcontroller from 8051 family and a battery for power source.
Functionality

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Cell Phone Controlled Robotic Vehicle
Advantage
1. Wireless control.
2. Surveillance System.
3. Vehicle Navigation with use of 3G technology.
4. Takes in use of the mobile technology which is almost available everywhere.
5. This wireless device has no boundation of range and can be controlled as far as
network of cell phone

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Cell Phone Controlled Robotic Vehicle
Disadvantage
1. Cell phone bill.
2. Mobile batteries drain out early so charging problem.
3. Cost of project if Cell phone cost included.
4. Not flexible with all cell phones as only a particular ,cell phone whose
earpiece is attached can only be used.

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Cell Phone Controlled Robotic Vehicle
Applications
 Military and Law Enforcement
 Search and Rescue Operations
 Scientific Applications
A Robotic Vehicle can be used in numerous applications like

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Cell Phone Controlled Robotic Vehicle
Military and Law Enforcement
 Remote control vehicles are used in law enforcement and military
engagements for some of the same reasons.
 It can be used in the borders for disposing hidden land mines.
 Remote Controlled Vehicle is used by police to detect bombs, or some
chemicals, etc.
 Remote controlled vehicles are used by many police department bomb-squads
to defuse or detonate explosives.

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Cell Phone Controlled Robotic Vehicle
Search and Rescue Operations
 UAVs and Robotic Vehicles will likely play an increased role in
search and rescue operations in natural calamities like earth quakes,
floods, wild fire and hurricanes.

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Cell Phone Controlled Robotic Vehicle
Scientific
 Remote control vehicles have various scientific uses including
hazardous environments, working in the Deep Ocean, and space
exploration.
 The majority of the probes to the other planets in our solar system
have been using remote control vehicles.

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Cell Phone Controlled Robotic Vehicle
Further Improvements and Future Scope
 IR Sensors To this Project.
 Password Protection.
 Alarm Phone Dialers.
 Adding a Camera to this project.

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Cell Phone Controlled Robotic Vehicle
Conclusion
 By developing a cell phone operated robotic Vehicle, we
have over come the drawbacks of the conventionally
used RF circuits. This RCV includes advantages such as
robust control, minimal interference and a large working
range.

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