Hello
In this article I discuss how I made a Bluetooth Controlled
Bot.
Time Required:
1 Hour
What is it ?
A Bluetooth controlled robot. You
can control the movement of the robot (forward, backward, left, right) through
an Android device. I used an application named Sena Bluetooth Terminal to send
data from my android device to the robot.
Parts Required
1. Arduino Uno
2. Battery Operated Motor (BO)
3. Wheels
4. Chassis
5. L293D Motor Driver
6. 2 9V Battery
7. HC05 Blutooth Module
Most of this parts can be found on ebay.
If you are reading this out of
shear interest, chances are high that you know something to many thing about arduino
microcontroller. If not, than just google it.
Before you proceed in making
this, learn how to handle the HC05 Bluetooth module. Below is the link that
will show you how to get into AT command mode and configure the Bluetooth module.
https://www.youtube.com/watch?v=-z_0aU8VHzk
Once everything is fine with the Bluetooth module you can
fall in line with this article.
The figure below is self-explanatory and here is the wiring information.
The Arduino Uno should be powered with a separate 9V battery (Not shown in figure)
L293D Motor Driver and Arduino Pin
Connection
Pin 1 goes to Arduino Pin 2
Pin 2 goes to Arduino Pin 4
Pin 3 goes to Motor 1.1
Pin 4 goes to Ground
Pin 5 goes to Ground
Pin 6 goes to Motor 1.1
Pin 7 goes to Arduino Pin 5
Pin 8 goes to Arduino 5V pin
Pin 9 goes to Arduino Pin 3
Pin 10 goes to Arduino Pin 6
Pin 11 goes to Motor 2.1
Pin 12 goes to Ground
Pin 13 goes to Ground
Pin 14 goes to Motor 2.2
Pin 15 goes to Arduino Pin 7
Pin 16 goes to 9V supply
Bluetooth module and Arduino pin
Configuration
RXD pin to Arduino pin 11
TXD pin to Arduino pin 10
VCC to Arduino 3.3V
GND to Arduino Ground
Note: It is better to use a L293D breakout board rather than
the lone IC. They are easily available in ebay.
Note: Arduino ground, HC05 Bluetooth module ground and 9V
Ground is common as seen in the figure
Below is the link to the Arduino Sketch or Code
https://drive.google.com/file/d/0BzjnppE-h-xeV21RVzk2MlJkZGs/edit?usp=sharing
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