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Everyone must be familiar with the term - Switched Mode Power Supply or SMPS. Yes, they are used in every personal computer. In fact, the Switched Mode Power Supply is widely used with many other devices. Once it is understood that what SMPS actually is, its countless applications can be easily imagined. 
 
An SMPS is used for converting the electronic power supply efficiently. Any SMPS has some storage components which store electrical energy to supply to the load device and some switching components which turn on and off at high frequencies charging and discharging the storage components.

A quadcopter is a four rotor unmanned aerial drone that operates with the same principle as of a helicopter with slight differences lying within both. It is used for several purposes in the military as well as social fields operating over a wide range of applications.

It has become a craze for building a quadcopter among people as it gives a wide variety of benefits as compared to the traditional helicopter such as stability and control. Till date quadcopter has only been used as a drone that is controlled from a distant place.

Introduction to LUFAUniversal Serial Bus (USB) is now a common and vast framework for serial communication. The interface not only allows serial communication, it also works as electronic power supply. The popular AVR microcontrollers fortunately have the USB interface feature and can be programmed to build USB devices. The USB specification is long and intimidating. It can be a daunting task to write a device specific USB driver.

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