Featured Blog Articles

ENIG vs HASL

Posted May 16, 2012 By Rolte Regmi

HASL stands for Hot Air Solder Leveling. ENIG stands for Electroless Nickel Immersion Gold. Both HASL and ENIG are two different types of a surface finish used for plating the Printed Circuit Boards(PCB). HASL is less environment friendly than ENIG. Choosing ENIG over HASL, reduces the use of lead and emission from flux and fusing oil. HASL has a excellent solder-ability and has a good shelf…
Common Temperature Scales

Posted May 16, 2012 By Andrew Carter

Three temperature scales are commonly used in science and industry nowadays. These are the Celsius, Kelvin and Fahrenheit.

Degree Celsius (0C)

The degree Celsius (°C) scale was created by separating the scale of temperature between the freezing and boiling temperatures point of pure water at normal atmospheric conditions or sea level pressure. into 100 equivalent parts. The unit…
The Mathematical Theory of Waves

Posted May 16, 2012 By Andrew Carter

Waves are known to us from the ocean, the study and theory of sound, and other natural phenomenon.. To completely understand waves, there is a need of understanding of its measurements related with their frequency, wavelength, and their vertical size or amplitude.

Though these measurements aid to describe waves, they cannot help out in making predictions about wave behavior. In order to do…
The Kelvin Temperature Scale

Posted May 16, 2012 By Andrew Carter

The Kelvin Temperature Scale

The Kelvin scale of temperature is the generally used in science, particularly in the physical sciences. The Celsius scale is still used a in many areas of physical science, but the Kelvin that is the major SI(International System) unit for temperature. It is to as Kelvin by using the symbol K.

This temperature scale was planned and deliberated by Lord…
Drinking Water From a Wind Turbine

Posted May 15, 2012 By Joel Burns

Check out this week’s episode! It features a new wind turbine that collects moisture and converts it into drinking water through a complex filtration system. What separates this filtration system from the rest is that it does not need an external power source, so they can be implemented in areas that are not near any electric grids or clean water sources.

Also featured on this episode:

*A space…
Thermometers

Posted May 15, 2012 By Andrew Carter

Before the thermometer was introduced, there was the first and closely related thermoscope, a thermometer without a scale. A thermoscope only displayed the differences in temperatures and it displayed something if it was getting hotter or colder. Some inventors created some version of the of it at the same time. In 1593, Galileo Galilei made up a elementary water thermoscope which allowed…
What is Silicon Photonics?

Posted May 14, 2012 By Jean-Louis Malinge

Ever since the invention of the transistor more than 60 years ago, semiconductor chips have used electrons for communications. Each new generation of devices offered more transistors in a smaller area, operating at faster speeds. Today, the semiconductor industry exceeds $250B per year with a single CMOS chip containing as many as a billion or more transistors. These complex circuits are still 100 percent electrical.
Simple Long Range FM Transmitter with 2 Watt Power and 1-2 KM Range

Posted May 14, 2012 By KALPESH CHHABHAIYA

Hello friends,
We know that building of Fm transmitter for first time is quite hard and we get confused about the components, parts, design, pcb, transmission frequency, inductor value and making of inductor , polarity of the capacitor and many things.

Here i am going to explain you a building of simple fm transmitter using a two transistor . I will try to explain as possible as i…

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New Blog Posts by EEWeb Members

FPGA Blog

Posted May 08, 2012 By Ravi Ramachandran

I share my ideas at http://fpga-blog.tumblr.com
Please do visit & comment.

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Solar PV Installer Training Course is your path to success in the growing

Posted May 03, 2012 By Ontility Solartraining

ONTILITY’s Solar Training Courses are ISPQ Accredited and are taught by ISPQ Certified Instructors and NABCEP Certified PV Installers.

Many NABCEP…

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Morse Code Used to Operate Intercom

Posted May 02, 2012 By Circuit Projects

The project is proven to be opened by using Morse code to open doors operated by intercoms.

In order to apply Morse codes, electric strikes are entered for a few seconds just like dialing…

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Decibels

Posted May 01, 2012 By Andrew Carter

The decibel (dB) is used to calculate sound level. The dB is a logarithmic unit used to describe a ratio. The ratio may be power, sound pressure, and voltage or intensity. The term decibel is…

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The Sensitivity of the Human Ear

Posted May 01, 2012 By Andrew Carter

Parts of the Human Ear

The outer ear or external ear is the visible portion of the ear which serves as a protective organ for the eardrum. It gathers and controls sound waves into the…

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The Doppler Effect

Posted Apr 30, 2012 By Andrew Carter

The Doppler effectrefers to anoticeable change in frequency of light or sound waves as the distance between the source and the observer changes. It is either the source or the observer of a wave is…

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Monochrome Graphic and Character LCDs

Posted Apr 30, 2012 By Precious O'Brien

Microtips Technology is a leading supplier of standard and custom monochrome LCD modules with a full catalog of Graphic and Character LCD products. Standard graphic modules are available in various…

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Applications of Sound in Medicine

Posted Apr 29, 2012 By Andrew Carter

The use of sound in medicine started since long time ago. Doctors have used stethoscopes to listen to human body’s internal sounds since the early 19th century and the ultrasound imaging has…

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Simple USB HID Keyboard for Password Generation

Posted Apr 29, 2012 By Circuit Projects

Bored of making the same old circuits again and again? Want to try out something cool? Then just follow the article and find out how to build a USB HID keyboard device.

The keyboard is…

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The Nature of Waves

Posted Apr 29, 2012 By Andrew Carter

A wave is defined as a continuous movement that transmits energy through matter or space.Energy can be conveyed from its source by a wave. The material through which the wave goes does not move with…

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