Dual Tone Multi Frequency (DTMF) Control Robot

Presented By:

Md. Tahamedur Rahman

Md. Nasim Reza

Id:153-33-2984 Id:153-33-2861

Supervised By

Ms. Tasmia Baten

Senior Lecturer Department of EEE Faculty of Engineering Daffodil International University

Department of EEE

Faculty of Engineering

Daffodil International University

Project Outline

• Project Goal
• Project Equipment's
• Image of Equipments
• Block Diagram Of Project
• Circuit Diagram Of Project
• Project Image
• Project Cost
• Application of DTMF Control Robot
• Project Drawbacks
• Future Work
• Conclusions

Project Goal

Objectives:

The objective of our project is to control the robot by mobile phone. Here, I break down my project objective step by step.

• To implement DTMF as a method of communication.
• To build an intelligent robotic system which offers ease of access and control to the user.
• The Third was designing the PCB of the circuit and then finalizing it for etching.
• To establish a robust communication channel by the use of GSM network through a mobile phone.
• To overcome the problem of NLOS and range problems using mobile technology.
• Control robot movement being anywhere in the world.

Project Equipment

• DTMF Decoder IC (MT8870)
• Motor Driver IC (L293D)
• Motors
• Resistors – 100KΩ x 2, 330KΩ
• Capacitors – 100nF x 2, 22pF x 2
• Crystal – 3.58MHz
• Robot Chassis
• Rechargeable Batteries
• Wire
• 3.5mm audio jack and cable

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Image Of Equipment

Fig: 9v DC motor

Fig: AC/DC Adapter

Fig: Wire

Fig: DTMF IC MT8870

Fig: Motor Driver IC (L293D)

Fig: Capacitors

Image Of Equipment

Fig: Resistor

Fig: Crystal 3.58MHz

Fig: Rechargeable Battery

Fig: 3.5mm audio jack and cable

Image Of Equipment

Fig: Robot Chassis

Block Diagram of project

Fig: Block Diagram of DTMF Control Robot

Circuit Diagram Of Project

Fig: Circuit diagram of DTMF controlled robot without microcontroller

Image of Project

Fig: Circuit diagram of automatic irrigation systems

Project Cost

Applications of DTMF Control Robot:

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 remote control vehicles, although some of the more recent ones were partially autonomous.

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Military and Law Enforcement

Military usage of remotely controlled military vehicles dates back to the first half of 20th century. Soviet Red Army used remotely controlled Teletanks during 1930s in the Winter War and early stage of World War II.

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Search and Rescue

UAVs will likely play an increased role in search and rescue in the United States. This was demonstrated by the successful use of UAVs during the 2008 hurricanes that struck Louisiana and Texas.

Project Drawbacks

• DTMF Transmit through the mobile network. So, mobile network should be available where the robot is operating.

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• Weather should be good. So that the transmitted signal can reach to the robot less distorted.

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• Robot’s battery health should be good to decode the received signal correctly.

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• As signal strength decreases the performance of the system also degrades.

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Future Work

In this project, we didn't utilize any applications on the control versatile, so for a future work it will be helpful to create programs for the cell phones to give more control choices and security control.

As a future work in the field of the introduced undertaking, we propose to build up the project utilizing PLCs or Microcontrollers rather than the control unit, to give greater unwavering quality and control choices, as security, temperature control and increasingly computational work. So the project can accomplish something other than On/off the gadgets.

Conclusions

So in conclusion, we were successfully able to design and implement a DTMF control robot using the components, ideas and concepts which were thought to us in this course.

• Components - Resistors, Capacitors, IC, etc.
• Ideas - Processing a signal by DTMF, Function separator circuit.
• Concepts - The working of a DTMF and Motor Driver IC.

References

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[1] Awab Fakih, Jovita Serrao, “Cell Phone Operated Robotic Car.” International Journal of Scientific & Engineering Research, ISSN 2229-5518.

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[2] Yun Chan Cho and Jae Wook Jeon “Remote Robot control System based on DTMF of Mobile Phone”, IEEE International Conference INDIN 2008, July 2008.

[3] http://www.dialabc.com/sound/dtmf.html

[4] http://www.robotplatform.com/howto/L293/motor_ driver_1.html

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[5] Datasheet MT8870 Zarlink Semiconductor - Page 6

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[6] http://www.electronics-diy.com/schematics/1074/dtmfdecoder_pcb1.gif

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[7] https://i.stack.imgur.com/MbXUO.png