`Hello World` in Electronics, Line Following Robot

Normally you would hear this term in computer languages. This is the first program that everyone writes for getting the basics right. Well, I would term this project as the `Hello World` for electronics for us at-least since we had no knowledge about electronics. So, let’s start with the application.

Basic requirement: Make a car move on a definite line marked. This requirement came after seeing my colleagues moving trolley’s from one place to another everyday.
Books referred: “Robot Building for Beginners” by David Cook

Building a Line Following Robot:

Well to start off, we need to get the material from the nearby electronics shop. The list is as below,

* 2 1k Resistors
* 2 20k Trim-pots
* 1 LM393 Op-Amp
* 2 2N2907/SK100 Transistors
* 8 High Intensity LEDs (Assortment of Red, Green and Yellow)
* 1 Power Switch
* 4 CDS Cells
* 1 8-Pin Dip IC Carrier (Required when connected to PCB)
* 1 PCB/Bread Board
* 2 GM2 Gear Motors
* 2 Gear Motor Plastic Wheels
* 1 Castor wheel
* 1 Double Sided Tape
* 1 Multimeter

The motors came around Rs. 100 each while the rest of the stuff in Rs 75, excluding multimeter (with available spares) :-).

The project started with getting the base of the car in place. A metal sheet was bent in U form and holes made to accomodate the wheels. Both the motors were glued to the sheet with the use of double sided tape and the wheels fixed. This was just to have the bare machine running on three wheels.

The Circuit:

Now all the pieces were assembled to the bread board and we were able to test the sensors. They are able to detect and stop the wheel from rotating.

The video:

It has still to go many things. And once it is done, will update the page.