Chan Lee

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How an arc flash relay works - Littelfuse PGR-8800 Arc-Flash Relay Demonstration

Demonstration

How a Rocket works ?

Coreless DC motors

Coreless dc motors are small motors which do not have a core. The armature winding is self-supporting wound in the form of a basket.<p>These motors can …

How do Wind Turbines work ?

Microresonators: Transmitting 40 Communication Channels with One Laser

Illustration: Birck Nanotechnology Center/Purdue UniversityThe beam from a single-wavelength laser (left) feeds into a microresonator (center) that …

The Science of Six Degrees of Separation

This app lets you visualize the WiFi signals pulsing around you

A new exhibit titled the "Architecture of Radio," created by Dutch artist Richard Vijgen, visualizes the overlapping signals that envelop us — from cell towers, WiFi routers, and even satellites flying overhead, using an iPad app.<p><i>Video courtesy of Richard Vijgen</i><p><i>Follow BI Video:On Facebook</i>

Acceptable levels of distortion in the mains supply system

Harmonic voltage distortionIn the mains supply system, <b>harmonic voltage distortion</b> is the consequence of the flow of harmonic currents through the …

These Incredible Saltwater Batteries Are Designed To Store Renewable Energy

Also, we’re currently wasting a lot of renewable power because we don’t use it at the moment it’s produced. Wind turbines are a bit like car …

How do Airplanes fly ?

Guide to specification of electric motors | EEP

Operating Characteristics Of Motor<p>Losses<p>The effective or useful power output supplied by the motor at the shaft end is lower than the power input …

LEGO’s WeDo 2.0 Robotics Kit Teaches Science And Engineering To Elementary School Students

LEGO Education is launching a new version of its WeDo robotics kit for elementary school students at CES today. Just like its predecessor, WeDo 2.0 is meant to introduce students to robotics, engineering and programming, but it’s also meant as a tool for teaching STEM in general.<p>The set will come …

Applying an Ethernet LAN in a Substation

Ethernet backbone<p>This paper is a discussion of an NSTAR Electric & Gas Corp. project using current <b>Ethernet technology</b> to build a Local Area Network …

NetSpot Maps Your Wi-Fi Network and Diagnoses Signal Problems for Free

OS X: NetSpot is a free utility that makes it easy to map out your wireless network, do a site survey if you have a particularly large one to manage, …

ABB GARAGE NUGGET #10 - How does a Miniture Circuit Breaker (MCB) work

Littelfuse Video Player

Whisper Node Arduino Low Powered Board With RF And More (video)

Makers, hobbyists and developers looking for a low powered Arduino compatible development board with built-in RF capable of running AVR projects for …

Conceptual Model of Smart Grid Framework by IEC

The basic system<p>From a communication point of view, each system plays the <b>role of either supplier or consumer of information</b>, or more typically both. …

Lockheed Martin's hypersonic aircraft plans are taking shape

Its Mach 5-plus tech is becoming seamless and relatively affordable.<p>For years, Lockheed Martin has been working on hypersonic (Mach 5 and above) aircraft like the SR-72, which could reach virtually any part of the world within a couple of hours. These vehicles have long been seen as distant …

Aviation

Arduino Comes To The Raspberry Pi, Linux ARM Devices

Arduino is the perfect introduction to microcontrollers and electronics. The recent trend of powerful, cheap, ARM-based single board Linux computers …

Boiler, How it works ?

Inventor of the cell phone says this is the next big thing

Marty Cooper, who built the first handheld cell phone, says his invention has a glaring flaw: You have to keep charging its battery.<p>"Keeping your phone charger around is a real annoyance," Cooper told CNNMoney in an interview. "And I think it's going to be an increasing problem."<p>Ensuring that your …

Miniature

Designing Advanced Metering System For Buildings | EEP

Automatic metering<p>Continuous automatic metering systems often use <b>dynamic energy dashboards</b> to display information about building operation and energy …

Energy Efficiency

Phases and wires in distribution of AC power

Distribution of AC power //AC power transmission is always at high voltage and mostly by <b>3-phase system</b>. The use of single-phase system is limited to …

Using Circuit Breakers For Direct Current (DC) Applications | EEP

Circuit breakers in direct current<p>This technical application paper is intended to explain the main aspects of the most important applications of</b> …

US Navy pushes ahead with 'revolutionary' electromagnetic railgun despite viability concerns

The US Navy is pushing ahead with a radical new cannon that one day could transform how wars are fought, even though some Pentagon officials have …

Electrical Design of Sun’s Datacenter In Santa Clara, California

Electrical Design Tour Of a Datacenter This technical article provides a top-to-bottom overview of Sun Microsystems’s Santa Clara, California …

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