Tired of putting LEDs every time you want to check some value in the microcontroller? Well, its time to build yourself a debugger.

A debugger is a device which helps you run through your code in the microcontroller step by step and also gives you the ability to read or write the registers directly using the PC which means you can check the value of any register or any variable at any time without the need for any external components like LEDs or seven segment displays. A debugger will help you immensely when you’re in the prototyping phase of any project. Since I almost entirely use AVR, I’ll be showing you how to build an AVR debugger. Read the rest of this entry »

One of the most important things in robotics is to accurately sense and control the rotation of a motor. One way to do this is to use stepper motors but they’re bulky, have very less torque and speed. Another is to buy a motor with quad encoders which work on the basis of hall effect, they give a very high resolution of about 10000-20000 counts/rotation but they’re very expensive. In this tutorial I’m going to show you how to build a very simple attachment to any geared motor to measure the angular rotation Read the rest of this entry »

Xbees are some of the most powerful wireless modules you can find and they’re also very easy to configure and use. The only thing is they cost about Rs.1000 to Rs.2500 depending on the range and other parameters. If you’re like me and only bought the modules Read the rest of this entry »

PCB etching tutorial

Posted: October 25, 2010 in Tutorials

In the previous tutorial I wrote about how to draw a schematic and design the PCB layout using eagle, now it’s time to actually use that to etch the PCB.

Things you’ll need:

1. Single sided PCB.
2. Access to a laser printer. (An inkjet will not do) Read the rest of this entry »

Eagle Schematic and PCB tutorial

Posted: October 24, 2010 in Tutorials
Tags: , ,

This tutorial will show you how to make a pcb right from creating the schematic and board layout to actually etching the pcb.

Since the tutorial will get a little big, Im gonna split it into two parts. The first will deal with creating the schematic and the board layout and the second will be about etching the pcb.

Read the rest of this entry »