This document describes a mobile controlled robot that uses dual-tone multi-frequency (DTMF) tones sent from a cell phone to control the robot's movement. The robot uses a DTMF decoder chip to receive and decode DTMF tones into a 4-bit code that is read by a microcontroller. The microcontroller then sends signals to a motor driver chip which controls the two DC motors to move the robot forward, backward, left or right depending on the tone received. The overall system allows remote control of the robot's movement via DTMF tones sent from a mobile phone.
What is DTMF Decoder , introduction , working of DTMF Decoder , block diagram of DTMF Decoder , components and Implementation of DTMF Decoder
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DTMF - Dual Tone Multi Frequency Signaling and AVR Atmel Atmega16multi-freque...Robo India
Robo India in this PPT presents the working principles, concept and usages of Dual Tone Multi Frequency Signaling -DTMF.
It also exhibit how to use DTMF with AVR series microcontrollers like Atmel Atmega 16, Atmega 8, Atmega 32 etc.
We welcome all of your views and queries, we are found at-
website: http://roboindia.com
mail- info@roboindia.com
A proof of concept how a land rover could be handled using a cell phone. Using a MT8870 series DTMF decoder, Atmega16 AVR microcontroller, L293D motor driver and 74LS04 NOT gate.
Although the appearance and the capabilities of robots vary vastly, all robots share the feature of a mechanical, movable structure under some form of control. The Control of robot involves three distinct phases: perception, processing and action. Generally, the preceptors are sensors mounted on the robot, the processing is done by the on-board microcontroller or processor, and the task is performed using motors or with some other actuators.
Part of our 3rd year-end Summer project.
What is DTMF Decoder , introduction , working of DTMF Decoder , block diagram of DTMF Decoder , components and Implementation of DTMF Decoder
Visit my Blog for more Education Material .Thanks
http://studyofcs.blogspot.com/search/label/Education
DTMF - Dual Tone Multi Frequency Signaling and AVR Atmel Atmega16multi-freque...Robo India
Robo India in this PPT presents the working principles, concept and usages of Dual Tone Multi Frequency Signaling -DTMF.
It also exhibit how to use DTMF with AVR series microcontrollers like Atmel Atmega 16, Atmega 8, Atmega 32 etc.
We welcome all of your views and queries, we are found at-
website: http://roboindia.com
mail- info@roboindia.com
A proof of concept how a land rover could be handled using a cell phone. Using a MT8870 series DTMF decoder, Atmega16 AVR microcontroller, L293D motor driver and 74LS04 NOT gate.
Although the appearance and the capabilities of robots vary vastly, all robots share the feature of a mechanical, movable structure under some form of control. The Control of robot involves three distinct phases: perception, processing and action. Generally, the preceptors are sensors mounted on the robot, the processing is done by the on-board microcontroller or processor, and the task is performed using motors or with some other actuators.
Part of our 3rd year-end Summer project.
Wireless Communication via Mobile Phone Using DTMF Vivek chan
This presentation of CyberLab describes complete process that how can we use a mobile phone as a remote control by using DTMF Decoder IC on Second End. Complete circuit diagram and working process is given in slides.
Mobile Phone Operated Dual-tone-multiple-frequency controlled Microcontroller...IOSRJEEE
Dual-tone-multiple-frequency (DTMF) controlled vehicle is a specific idea in automotive whose actions can be controlled by a mobile phone from all over the world using the DTMF signaling. Traditionally wireless controlled vehicles make use of RF (radio frequency) circuits, which have its own disadvantages of restricted operational range, limited frequency range and limited control. Use of mobile phones for robotic controls provides working range as large as the coverage area of the service provider and no interference with other controllers. I can propose a microcontroller based less effort oriented, cost productive hockey ground roller with smooth pitch rolling technique operated from long range distance by using Mobile phone which acts as a DTMF signal controller with GSM technology. Generally the field of play is 91.4 by 55.0 meters with an area of 5,027 square meters for Hockey. According to my proposed work ground authority can be able to operate that roller to roll aforesaid measurement from pavilion without taking any help of ground staff. Combination of DTMF-GSM technology is more controller friendly as it doesn’t interfere with other controllers and can use up to twelve controls. It also has the advantages of robust control and provides working range as large as the coverage area of the service provider.
Newly master counter remote control copierJack Chen
Master Counter Remote Control Copier can be used to copy each factory brand's remote control swiftly; including fix code, computer code, and part of roll code. Its function has remote control regenerate and frequency check and so on. Equip three remote control (Including size A, B, C). It is easy to operate according to the introduction in using manual.
Final Presentation of my Thesis on "A Neurally Controlled Robot That Learns" at Imperial College, 22. Sept 2011.
Full thesis incl. source code available on Github:
https://github.com/bwalther/DA-STDP-modulated-learning-in-mobile-robots
Wireless Communication via Mobile Phone Using DTMF Vivek chan
This presentation of CyberLab describes complete process that how can we use a mobile phone as a remote control by using DTMF Decoder IC on Second End. Complete circuit diagram and working process is given in slides.
Mobile Phone Operated Dual-tone-multiple-frequency controlled Microcontroller...IOSRJEEE
Dual-tone-multiple-frequency (DTMF) controlled vehicle is a specific idea in automotive whose actions can be controlled by a mobile phone from all over the world using the DTMF signaling. Traditionally wireless controlled vehicles make use of RF (radio frequency) circuits, which have its own disadvantages of restricted operational range, limited frequency range and limited control. Use of mobile phones for robotic controls provides working range as large as the coverage area of the service provider and no interference with other controllers. I can propose a microcontroller based less effort oriented, cost productive hockey ground roller with smooth pitch rolling technique operated from long range distance by using Mobile phone which acts as a DTMF signal controller with GSM technology. Generally the field of play is 91.4 by 55.0 meters with an area of 5,027 square meters for Hockey. According to my proposed work ground authority can be able to operate that roller to roll aforesaid measurement from pavilion without taking any help of ground staff. Combination of DTMF-GSM technology is more controller friendly as it doesn’t interfere with other controllers and can use up to twelve controls. It also has the advantages of robust control and provides working range as large as the coverage area of the service provider.
Newly master counter remote control copierJack Chen
Master Counter Remote Control Copier can be used to copy each factory brand's remote control swiftly; including fix code, computer code, and part of roll code. Its function has remote control regenerate and frequency check and so on. Equip three remote control (Including size A, B, C). It is easy to operate according to the introduction in using manual.
Final Presentation of my Thesis on "A Neurally Controlled Robot That Learns" at Imperial College, 22. Sept 2011.
Full thesis incl. source code available on Github:
https://github.com/bwalther/DA-STDP-modulated-learning-in-mobile-robots
project presentation on cell phone operated land roversunanda kothari
The objective of this project is to enable the users to control a robot by a mobile phone that makes a call to the mobile phone attached to the robot. The operations performed by the cell phone operated land rover includes forward, backward, stop, left and right turn.
Cell Phone Controlled Home Automation System using DTMF TechnologyTaufique Sekh
This home appliances control or home automation project uses DTMF decoder circuit to control home and office electrical appliances. Just connect your cell phone headset (headphone) jack to the mobile phone and then mobile will control electrical appliances and electrical equipment through the DTMF key pad of your cell phone. Here for demonstrating, we are controlling an electrical bulb using this circuit project but you can extend this circuit to control many electrical devices with some modifications using4×16 decoder IC.
Cell Phone Controlled Home Automation System using DTMF TechnologyTaufique Sekh
This home appliances control or home automation project uses DTMF decoder circuit to control home and office electrical appliances. Just connect your cell phone headset (headphone) jack to the mobile phone and then mobile will control electrical appliances and electrical equipment through the DTMF key pad of your cell phone. Here for demonstrating, we are controlling an electrical bulb using this circuit project but you can extend this circuit to control many electrical devices with some modifications using4×16 decoder IC.
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
3. SPECIFICATIONS
Standard features are used.
Cell phones used for the connection should be specified
models like Nokia 1100, Nokia 1600.
Working communication through a hands-free jack.
Connection between cell phones are manually activated.
System is an open-loop system.
4. TECHNOLOGY
DUAL-TONE MULTI-FREQUENCY (DTMF)
Dual Tone Multi Frequency (DTMF) tone is the
signal to the network center that is generated when
any key of telephone is pressed.
With DTMF, each key pressed on phone, generates
two tones of specific frequencies.
One tone is generated from a high-frequency group
of tones and the other from a low frequency group.
5. TECHNOLOGY
The row in which the key appears determine the low
frequency, and column determine the high frequencies.
For example, pressing the ‘1’ key will result in a
sound composed of both a 697 Hz and a 1209 Hz tone.
DUAL-TONE MULTI-FREQUENCY (DTMF)
FIG: FREQUENCY TABLE
6. HT9170 series IC’s are DTMF
tone receivers.
They are integrated with Digital
Decoder.
Detects and decode all the 16
DTMF tone pairs into 4 bit code.
DTMF DECODER
FIG: PIN DIAGRAM
7. FIG:CIRCUIT CONNECTION
DTMF DECODER
Built-in Dial tone rejection
circuit eliminates the need of
pre- filtering.
When input signals are
recognized to be effective,
DV becomes high, and the
correct tone code (DTMF)
digit is transferred.
The low group filter filters
low group frequency signal
output whereas the high
group filter filters high group
frequency signal output.
12. WORKING
A.) INPUT MODE
Input is given from hands-free connected to mobile
(stacked on Robot).
Input is a DTMF Tone sent through a mobile far distant
from Robot.
HT9170 series decoder is used at input.
Detect and decode all the 16 DTMF tones pairs into a 4-
bit code output .
13. 4 bit binary code bit pattern is generated as D0,.D1,D2,D3
(Pin 11, Pin 12, Pin 13, Pin 14 of HT9170).
WORKING
DTMF
TONE
PC6 PC5 PC4 PC3 PC2 PC1 PC0
2 1 --- --- 1 1 0 1
4 1 --- --- 1 0 1 1
6 1 --- --- 1 0 0 1
8 1 --- --- 0 1 1 1
* 1 --- --- 0 0 1 1
FIG: INPUT TABLE FOR DTMF TONES
14. WORKING
B.) PROCESSING MODE
Output from HT9170 is given at input pins of the NOT
Gate inverter IC 7414 ( Pin 1, Pin3, Pin 5, Pin 9).
This output is given to the microcontroller’s
(ATmega8) input port (as assigned in programming as
Port C). Pin 23, Pin 24, Pin 25, pin 26.
The Pin 1 of the microcontroller is used as the reset pin.
A 12 MHz crystal clock is used between Pin 9 and
Pin10 along with 2 capacitors C1 and C2
15. PINS OF MICROCONTROLLER NAMES FOR PROGRAMMING PORT
17 MOSI
18 MISO
19 SCK
1 RESET
7 VCC
8 GND
The Pin 1 , Pin7, Pin 8 , Pin 17, Pin 18, Pin 19 of
microcontroller are used for programming of the
controller.
The output of the microcontroller are taken from Pin 14,
Pin 15, Pin 16, Pin 17.
WORKING
FIG: CONFIGURATION OF MICRONTROLLER PINS
16. WORKING
C.) OUTPUT MODE
The Motor Driver IC L293d
is used for controlling the
motion of the motors .
The Pin 2, Pin 7, Pin 10 and
Pin 15 are the input pins of
L293d IC
Output pins are configured as
Pin 3, Pin 6, Pin 11, and Pin
14.
FIG: L293D IC
18. In this mode, the ROBOT perform general motions i.e., Forward,
Backward, Left and Right.
Forward Motion:- Both the Motors operate (In Forward direction).
Backward Motion:- Both the Motors operate. (In Backward Direction)
Left Motion:- Right Motor operate and Left Motor is stopped.
Right Motion:- Left Motor operate and Right Motor is stopped.
DTMF TONE PB3 PB2 PB1 PB0 MOTION#
2 1 0 0 1 FORWARD
4 0 0 0 1 LEFT
6 1 0 0 0 RIGHT
8 0 1 1 0 BACKWARD
* 0 0 0 0 STOP
MOTION OF MOTORS