Portable Battery Charger Using Renewable Energy Sources like Solar or Wind Project

Tweet

Every innovations starts from a simple day to day life problem like you watching IPL in TV and suddenly the current shuts off, fortunately you will find another way to watch the match via mobile network. Similarly, I too had faced a problem of frequent drains in mobile battery while travelling
somewhere in bus or while walking on the endless roads to our destination during hot sunny day.

There are many innovative projects on wind powered mobile charger which looks huge enough to produce 5v dc but they weighs more and bulky. I gathered some information from them for my project and started with a basic 12 volt DC motor. I used it to generate power for my mobile phones,and it ended up with failure.Then I used an feedback amplifier circuit but it was so huge.

How To Simulate a Program on Keil MicroVision Software - Tutorial

Tweet

Keil Microvision is an Integrated Development Enviornment (IDE) tool developed for students, embedded system designers and developers to make their programming easier. The keil combines project management, source code editing, program debugging and simulation of a program in one platform. Here i am going to demonstrate you on How to Debug or Simulate a program on Keil uvision software. I recommend you to read my previous post about How to Program a Microcontroller? [Basic Steps].
In order to simulate a program on keil microvision software (or any) you should have an Error and Warning Free source program. Here i am demonstrating you the simulation of a sample Led Blinking Program.

Difference Between CMOS, BIPOLAR, and GaAs Technology

Tweet

COMPARISON BETWEEN CMOS, BIPOLAR JUNCTION TRANSISTOR (BJT) AND GALLIUM ARSENIDE TECHNOLOGY 

 Here the following table helps you to learn the differences between Cmos, Bjt and GaAs Technologies.

CMOS	BIPOLAR	GaAs
Low power dissipation	High power dissipation	Medium power dissipation
Low current drive	High current drive	Low current drive
High input impedance	Low input impedance	High input impedance
High noise margin	Medium noise margin	Low noise margin
Medium speed of operation	High speed of operation	Very high speed of operation
High voltage swing	Low voltage swing	Low voltage swing
High packing density	Low packing density	High packing density
High delay sensitivity	Low delay sensitivity	High delay sensitivity
Low output drive	High output drive	Low output drive
Bidirectional	Unidirectional	Bidirectional
Ideal switching device	Non ideal switching device	Reasonable switching device

Pre Emphasis and De Emphasis Theory and Circuit Diagram

Tweet

What is Emphasis?

Emphasis is the process of boosting the Amplitude Vs Frequency characteristics of a signal to reduce the effects caused by noise while transmission or reception of message signal over the channel. The noise that may occurs include both single frequency interference and thermal noise. Noise is inherently greater in amplitude at higher modulating signal than at lower frequencies, because the signals with higher frequencies have low SNR (Signal to Noise Ratio). By emphasis, approximately a 12db of improvement in noise can be achieved in FM.

Pulse Width Modulation Using 555 Timer IC

Tweet

What is modulation?

In analog or digital communication system, it is impossible to transmit a low frequency message signal over a channel, it causes signal distortion, attenuation or signal loss. Inorder to make the transmission ideal (almost), we have to use some techniques called modulation. Modulation can be defined as the process of varying some characteristics of carrier signal in accordance with the instantaneous value of message signal. Carrier signal is a high  frequency wave generated by a local oscillator, used to carry the message signal from transmitter to reciever. The message signal which is mixed with carrier wave is called modulated signal and the process is called Modulation. The modulation is an important process in a basic communication system, which increases the transmission range, reduces the size of antenna and increases the efficiency of the system by reducing noise interference.

7 Simple Steps to Burn a Program into Microcontroller

Tweet

Programming the microcontroller is one of the basic step while designing an embedded system. Here in this tutorial, i am presenting you on How to burn a program into the microcontroller as step by step. For that i am using Keil microvision software. I hope this tutorial will help all the Electronics and Communication Engineering students for doing their mini projects.

An embedded system can be defined as a combination of some Hardware and Software, which is used to perform a single well defined task. Generally, an embedded system consisting of a processor, associated peripherals (Input/output ports, lcd display, led indicator or some secondary storage devices) and software used for doing a specified purpose.