Ubuntu is a linux based operating system (debian based), open sourced and completely free .Ubuntu 11.04 got really cool, good looking and stable.

Clex is a terminal based file manager which can be directly used from the linux terminal in text mode.

FFplay is a very simple and portable media linux based player using the FFmpeg libraries and the SDL library.

How To Share Files and Folders between Linux Ubuntu (host) and Windows virtual Machine (Virtual Box OSE) Running inside linux.

Description IC 7805 regulator:
IC 7805 is a 5V Voltage regulator IC that restricts the voltage output to 5V. 7805 comes with provision to add heat sink. The maximum value for input to the voltage regulator is 35V. It can provide a constant steady voltage flow of 5V for higher voltage input till the threshold limit of 35V. If the voltage is near to 7.5V then it does not produce any considerable amount of heat and hence no need for heatsink.

This Tutorial project shows a Computer USB Interface through pic18f4550 Microcontroller which allows to blink few led's, Control motors and other devices with computer through a USB Interface hardware that we are going to make with easy steps. USB PIC18F4550 interface project is Human Interface Device HID. You can find the Complete pic18f4550 Schematic , Circuit diagram of the hardware with Software , Driver and Complete step by step tutorial for beginner here.