Abstract—“WIRELESS DUAL DC MOTOR CONTROL ” is less complex than the standard dc motor control. The device aim is how to build dual dc motor control system, combined with a wireless receiver and transmitter which will tell the two independent motors at which speed they should move and in what direction. There are four core components: input system for the transmitter, a wireless transmitter, wireless receiver and a motor controller connected to the receiver. Transmission and reception are enabled using XBee module. The information is sent to the motor through an XBee transmitter via system software ‘Terminal’. XBee receiver placed on the robot will automatically connect with the transmitter and begin receiving data. The receiver will receive the unique values from an XBee module and tells each motor independently which way to turn and how fast to move. Software is loaded into the PIC. Motor control combined with wireless transmitter and receiver is an uncomplicated and low cost design that works reliably

Athira Poovathody

Dina Ravindran K. T. Mazinjallad

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Wireless Dual DC Motor Control 
Athira Poovathody
1     Dina Ravindran
2     K.T.MazinJallad
3     Semitha.S.Muhammed
4 
1,2,3&4UG Student, Dept. of EEE, M.A. College of Engineering, Kothamangalam, Kerala. 
Abstract—“WIRELESS  DUAL  DC  MOTOR  CONTROL”  is  less  complex  than  the  standard  dc  motor 
control. The device aim is how to build dual dc motor control system, combined with a wireless receiver 
and transmitter which will tell the two independent motors at which speed they should move and in 
what direction. There are four core components: input system for the transmitter, a wireless transmitter, 
wireless  receiver  and  a  motor  controller  connected  to  the  receiver.  Transmission  and  reception  are 
enabled  using  XBee  module.  The  information  is  sent  to  the  motor  through  an  XBee  transmitter  via 
system  software  ‘Terminal’.  XBee  receiver  placed  on  the  robot  will  automatically  connect  with  the 
transmitter and begin receiving data. The receiver will receive the unique values from an XBee module 
and tells each motor independently which way to turn and how fast to move. Software is loaded into the 
PIC. Motor control combined with wireless transmitter and receiver is an uncomplicated and low cost 
design that works reliably. 
Index Terms—Embedded C,  PIC,  XBee,  Terminal 
I.   INTRODUCTION  
Wireless  communication  is  the  transfer  of  information  between  two  or  more  points  that  are  not 
connected by an electrical conductor. The most common wireless technologies use radio. With radio waves 
distances  can  be  short,  such  as  a  few  meters  for  television  or  as  far  as  thousands  or  even  millions  of 
kilometers  for  deep-  space  radio  communications.  It  encompasses  various  types  of  fixed,  mobile,  and 
portable applications, including two-way radios, cellular telephones, etc.     
Standard DC motor control can be complex enough if one is new to electronics. But wireless dual dc 
motor control is simpler. The input system to the transmitter will be the output from the Terminal software. 
The required information is inputted through the Terminal software. The analogue voltage it outputs will be 
translated by the microcontroller's ADC to a value from 0 to 1023. This value will be scaled to 16 unique 
values for each motor and then transmitted through an XBee module. The receiver will receive these unique 
values from an XBee module and tell each motor independently which way to turn and how fast by sending 
a PWM signal to the motor controller. Temperature sensing and visual capturing of disaster area is also 
implemented in the project. 
 
 
 
 
 
Figure 1: Block Diagram 
II.  HARDWARE 
A.  L293D- Motor Controller IC 
The L293D is a quadruple high-current half-H driver. The L293D is designed to provide bidirectional 
drive currents of up to 600-mA at voltages from 4.5 V to 36 V. All inputs are TTL compatible. Each output is 
a  complete  totem-pole  drive  circuit,  with  a  Darlington  transistor  sink  and  a  pseudo-Darlington  source. 
Drivers are enabled in pairs, with drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4 enabled by 3,4EN. 
When an enable input is high, the associated drivers are enabled and their outputs are active and in phase 
with their inputs. When the enable input is low, those drivers are disabled and their outputs are off and in 
the  high-impedance  state.  With  the  proper  data  inputs,  each  pair  of  drivers  forms  a  full-H  (or  bridge) 
reversible drive suitable for solenoid or motor applications. 
B.  XBee Module 
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Vol. 2, Issue 6, June 2014
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23XBee is  the  brand  name  from Digi  International for  a  family  of  form  factor  compatible  radio 
modules.The XBee modules work at the 2.4 GHz frequency which means smaller board and antenna size. 
XBee modules have the ability to transmit Digital, PWM, Analogue or Serial RS232 signals wirelessly 
C.    Liquid Crystal Display 
LCD (liquid crystal display) screen is an electronic display module. A 16x2 LCD display is very basic 
module and is very commonly used in various devices and circuits. These modules are preferred over seven 
segments and other multi segment LEDs. The reasons being: LCDs are economical; easily programmable; 
have no limitation of displaying special & even custom characters (unlike in seven segments), animations 
and so on.A 16x2 LCD means it can display 16 characters per line and there are 2 such lines. In this LCD 
each character is displayed in 5x7 pixel matrix. This LCD has two registers, namely, command and data.The 
command register stores the command instructions given to the LCD. A command is an instruction given to 
LCD to do a predefined task like initializing it, clearing its screen, setting the cursor position, controlling 
display etc. The data register stores the data to be displayed on the LCD. The data is the ASCII value of the 
character to be displayed on the LCD. 
III.  CIRCUIT DIAGRAM 
 
 
 
 
 
 
 
 
 
 
 
Figure 2: Circuit Diagram 
IV.  THEORY 
This paper deals with designing and implementation of a wireless control system for an Electronic/ 
Electrical  device.  The  overall  system  consist  of  a  device  which  is  to  be  controlled  in  which  PC  is  as 
controller, sensors for the purpose of sensing the current status of the device and XBEE communication 
module  as  a wireless  communication  device. Based  on  data,  received  from  the  sensors  attached  on  the 
device via XBEE module, the controller (PC) will ex-amine the current status of the device and if some 
remedy is required it will send a controlling signal back to the device. These signals along with the feedback 
signals are sent and received via XBEE modules for wireless communication. The whole control system is 
realized and experimental results have been obtained. 
All  connections  are  made  as  shown  in  the  circuit  diagram  for  the  transmitter  section  and  receiver 
section. Transmitter connected to the pc through a connecter and connection is pertained through terminal 
software to send instructions to the motor. The program code is burned into the PIC using PICkit2 software. 
Web camera captures the details on the disaster prone area, which is reflected upon the pc. According to the 
details acquired direction control letters F,L,R,B and S for forward, left, right, reverse and stop are used 
respectively in the terminal software. The speed control is attained in the forward direction using letters F, 
A, and Q, whereby the speed is decreasing stepwise. Temperature sensing is also included by letter T to get 
the temperature of the disaster area on the LCD.  
A.  Direction Control 
Direction  control  is  attained  using  L293D  motor  controller  IC.  It  is  a  dual  H-bridge  motor  driver 
integrated circuit (IC). Motor drivers act as current amplifiers since they take a low-current control signal 
and provide a higher current signal. This higher current signal is used to drive the motors. L293D contains 
two  inbuilt  H-bridge  driver  circuits.  In  its  common  mode  of  operation,  two  DC  motors  can  be  driven 
simultaneously. The motor operations of two motors are controlled by input logic at pins 2 & 7 and 10 & 15. 
Input logic 00 and 11 to both the inputs will stop the motor. 10 to the inputs will rate the motor in clockwise 
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24direction and 01 in the anticlockwise direction. To move the robot in the forward direction both motors are 
rotated in clockwise direction and to reverse the direction motors are rotated in anticlockwise direction. 
Stopping the left motor and rotating the right one in the forward direction will make the robot to move left. 
Similarly, stopping the right motor and rotating the left one in the forward direction will make the robot to 
move right. 
 
 
 
 
 
 
 
 
 
Figure 3: Working Model 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
Figure 4: Flowchart 
B. Speed Control 
Speed control is attained by incorporating the speed control program of PWM chopping into the PIC. 
The duty cycle is increased by increasing the time delay for 1’s operation. The more the duty cycle the 
higher is the speed. The duty cycles employed here are 100%, 60%, 50% and 0% which are designated by the 
letters F, A, Q, and S respectively. More number of duty cycles can be employed as per the user requirement 
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25by modifying the program to the PIC microcontroller. Hence speed control attained with commands in the 
terminal program. 
V. CONCLUSION 
The control signal from the transmitting end is successfully transmitted to the receiving end via XBEE 
module, as per the control signal the motor shaft will rotate,and the camera successfully transmitted the 
current position of the shaft to the transmitter end through XBee module which is displayed in pc. 
A.  Future Scope 
This project can be improved into a larger scale by expanding the speed control range, including other 
sensing devices like humidity, pressure, smoke etc. The signals thus received can be useful to make better 
decisions on the management of the surrounding area. Water sprinklers on detection of fire can also be 
included on a larger scale for its improvement.   
Here  we  can  also  control  various  machines  used  in the industry  with  the help of  this  project. The 
wireless technology based on XBee module provides a wide range over the conventional technologies for 
the device controlling. 
ACKNOWLEDGMENT 
We express our deep gratitude to the Almighty, the supreme guide, for bestowing his blessings upon us 
in this entire endeavour. We would like to express our sincere thanks to Prof. K Radhakrishnan, Head of 
Electrical and Electronics Engineering Department, for all his guidance.A deep sense of gratitude to Project 
coordinator, Prof. Elizabeth Sebastian, whose overall direction and guidance has been responsible for the 
successful completion of this project. We express our sincere gratitude to our project guide, Asst. Prof. Jisha 
Kuruvilla, for her cooperation and guidance for preparing Project. Finally, we would like to thank all the 
faculty members of Electrical and Electronics Department and our friends for their constant support and 
encouragement.    
REFERENCES 
[1]  Sudip  K.  Mazumder,  “Rotor  Position  Feedback  Over  an  RF  Link  for  Motor  Speed  Control”,  IEEE 
Transactions on Power Electronics, vol. 25, No. 4, April 2010 
[2] Preeti, Sandeep Dogra, Rashmi Jain, “DC Drives: Microcontroller Based Control”, Preeti, Sandeep Dogra, 
Rashmi Jain, International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, 
Volume-2, Issue-2, December 2012  
[3]  Rajeev  Piyare1,  Seong-roLee,  “Performance  Analysis  of  XBee  ZB  Module  Based  Wireless  Sensor 
Networks” International Journal of Scientific & Engineering Research, Volume 4, Issue 4, April-2013. 
[4]Kumarinimmi, Ruby Kumari, Pragatibag, “Wireless Motor Speed Control Using Rf Sensor” Kumar et al./ 
IJAIR Vol. 2 Issue 4 ISSN: 2278-7844 
[5]“Xbee  Based  Device  Control  With  Feedback  ”,  International  Journal  of  Advanced  Technology  & 
Engineering Research (IJATER) , ISSN No: 2250-3536 Volume 2, Issue 2, May 2012 
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Transactions on Engineering and Sciences                                        ISSN: 2347-1964 Online 2347-1875 Print
Vol. 2, Issue 6, June 2014
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26

Wireless Dual DC Motor Control

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Wireless Dual DC Motor Control

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