Line Follower using AVR

Hello Buddies,

Here is a simple guide to make a Line Follower using AVR.

First and Foremost,What is a Line Follower?

Line Follower is a Robot that can follow a path. Path is usually a Black Line on a white surface or vice versa.

Following Components are required for making a Line Follower :

• Robot Chassis 

          Provides a base to the robot.

          Wheels,sensors and development boards are attached to it.

• AVR Development Board (Model : PT0002)

          Used to interface motors,sensors and various other devices with microcontroller.

• DC Geared Motors (Product ID : PT0017)

          Motors which works on DC current and gives a rotating motion as an output. 

• Dual Pair IR Sensor Module (Product ID : PT0030)

          IR Sensor works on the principal of emitting IR rays and recieving the reflected rays via reciever. 

• USB AVR ISP Programmer (Model PT : 0092)

          Used to program microcontoller from laptop only.

• Two 4 Pin Connectors 
• DC Supply (12V)

Now write a suitable code keeping the following things in mind :

• For moving Forward : Both motors Clockwise
• For moving Backward : Both motors Anti-Clockwise
• For turning Left : First off Second Clockwise
• For turning Right : First Clockwise Second off

Once code is written program your micro controller i.e. Atmega 16 using usb isp programmer.

Now we just have to mount the avr development board and IR sensors on chassis.

Make Sure to visit http://positronindia.in for the hardware required and refer to the Model No. given above.

Hope you understood the simple steps involved in making a Line Follower.

Happy Learning!!!

See the video of this project : https://www.youtube.com/watch feature=player_embedded&v=lV7detQ8dCA#at=39

About the Author : This post has been written by Ayush Sharma, an intern with Positron Technologies. Ayush is presently pursuing his BE at School of Engineering, Manipal University Jaipur. He can be contacted at ayush@positronindia.in.

CREATING HEX FILE USING KEIL uVISION4

Hello Folks,

Here is a guide to prepare a HEX file using KEIL uVision 4.

First and foremost, install Keil for 8051 on your computer. You can download the software at  http://keil.com/downloads

Go to the Start Menu of your Windows OS. Type in KEIL and select KEIL uVision.

Once the software is launched. Have a look at your workspace. It should look something like this.

Now you are ready to go.

Click on Project and select New uVision Project.

Give a name to your project. Can be anything, let me name it as sampleproject.

Once you have named your project. Now is the time to select your device. For 8051, select ATMEL and then select AT89C51.

Now, KEIL will ask, whether you would like to copy 'STARTUP.A51' to project folder. Select Yes.

Now is the time to write the code. Before writing the code, create a new ".C" file. Go to the File menu, and select "New".

A writing pad will open. Write down your code in it.

Once the code is written, we need to save the file. Go to the File menu and click on Save As.

Let's save the file as sampleproject.c

Do not forget to give the file an extension .c

Remember KEIL can be used to compile assembly as well as C Codes. As a tip, in case you have written down the code in Assembly, you need to save the file with a .asm extension.

Now, we need to compile the code, or so to say, "Build the Target". Before doing that, we need to do some settings.

Go to the Project menu and select Options for Target 'Target 1'

A dialog box will open. Select the Output menu and check on Create HEX file option.

Unless you check on this option, HEX file shall not be created.

Now, only one step remains. We need to Build the Target. Click on the Project Menu, and select Build Target.

And, your HEX file is created. Remember, the HEX file shall be created in he same folder, where your .c file is.

Hope you understood the simple steps involved in creating a HEX file using KEIL uVision4.

Happy Learning!

 

Running two motors in 2 directions using Positron’s L293D Motor Driver

    

• Connect the power supply terminals to 12V power supply. We shall be running a 12V DC geared motor.

•  Connect the 2 wires of a motor to the screw terminals. Two screw terminals are provided, so we can operate two bidirectional motors .

• Connector pins are provided for operating both the motors and are clearly labeled.

• Considering motor M1, provide logic 0 on one of the pins and logic 1 (+5V) on the other.

• Observe what happens…

 Now reverse the logic. What do you think should happen now?? 

The First Post

Finally, after a long delay, we have a fully functional website of Positron Technologies, and this is the first post of its official blog.

Positron Technologies was founded to support Microcontroller enthusiasts in development of their embedded designs. We constantly dedicate our resources and efforts in bridging down the gap between top quality components and an embedded developer. We are one of the leading suppliers and traders of Active and Passive Components, Sensors, Switches, Wireless Modules, Robotics Products, Engineer Students Project Items, Development Board, Modems and Modules. All our products are highly appreciated for their durability, reliability and robust construction.

PT has a special section dedicated to the robot-crazineers. We have an extensive range of motors, motor drivers, and other robotic accessories for the robot fanatics. 

Hope to see you around!