Souce Code formatter for blogger

Here are some sites that help you to convert your code snippets into html format. The code is converted into a tabular format.

• codeformatter.blogspot.in

• http://hilite.me/

Interfacing HC-SR04 Ultrasonic Module with Arduino Pro Mini

SR04 is a module that can detect distance between 2cm to 400cm by sending out ultrasonic waves and calculating the time between the sent signal and echo received.

Steps:

1. Send the trigger signal - a TTL 10us signal
2. Wait for the echo pin to get high.
3. Calculate the time for which the echo pin is high using a timer.
4. Calculate the distance using 

Distance = high level time * velocity (340M/S) / 2

Atmel AVR Fuse Bit Calculator

You can find out the fuse bit setting here without any effort .
Click Here