September 2009 Archives

LED street lamp driver circuits - how to design them

By Alun Williams - Electronics Weekly.com on September 30, 2009 11:48 AM | No Comments | No TrackBacks
Christopher Richardson, systems applications engineer for lighting at National Semiconductor, investigates LED street lamp driver circuits.

In an in-depth article recently added to the site, he considers driver topologies, DC bus voltages, and design challenges with buck regulators.

He begins:
Continue reading LED street lamp driver circuits - how to design them.

Top 10 LEDs for lighting - Cree LRP-38

By Alun Williams - Electronics Weekly.com on September 30, 2009 11:29 AM | No Comments | No TrackBacks
Check out our Editor's choice of 10 LED products that stand out for their specifications and efficiencies in this most active of design areas.

Cree LRP-38 is an LED with a colour rendering index (CRI) of 92, putting is among incandescents for colour quality.

"It generates a CRI of 92 at a colour temperature of 2,700K. The tightly-focused beam delivers a centre beam candlepower of 4,000 with a beam angle of 20 degrees," said Cree.

"This light is designed to replace 50-90W halogen PAR38 bulbs in various applications."

Continue reading Top 10 LEDs for lighting - Cree LRP-38.

Top 10 LEDs for lighting - Bridgelux

By Alun Williams - Electronics Weekly.com on September 29, 2009 11:20 AM | No Comments | No TrackBacks
Check out our Editor's choice of 10 LED products that stand out for their specifications and efficiencies in this most active of design areas.

Bridgelux offers multi-die power LEDs with outputs up to 2,000lm.

To provide isolated heat sinks with high thermal conductivity, the firm has built isolation into the individual die. All there is in the package is the die, the die attach, and the aluminium substrate. Thermal conductivity is in the range 0.5 to 0.8°C/W.

Continue reading Top 10 LEDs for lighting - Bridgelux.

LED 2009 San Diego

By Ian Bryant on September 25, 2009 8:03 PM | No Comments | No TrackBacks

Getting ready to ship the stand and demos over to Jim our US Business manager so that we have the new parts ready for the stand!!!

If any of you are over in sunny San Diego in October drop by the conference and show.

Here is the link to the conference site take a look as there are a collection of great speakers talking on the latest advances in the technologies.

http://www.ledsconference.com/

 

LED 2009.JPG 

Alien LED Jumper Cables

By Alun Williams - Electronics Weekly.com on September 21, 2009 11:02 AM | No Comments | No TrackBacks
Alien LED jumper cable.jpgOne for your car, maybe - they jumped out at me on Sunday, browsing a website called Craziestgadgets.com.

Why are these jumper cables on this blog? They feature LED lighting on the clamps that give the alien eyes a certain blaze, and help illuminate the work at hand.

They are available from the Herrington catalogue for 35 online dollars:
"Ingenious, high-intensity LEDs on each clamp automatically light up when you squeeze open the jaws -- illuminating dark engine bays and poorly marked battery terminals," it writes.

Supercool LED stick lights

By Alun Williams - Electronics Weekly.com on September 17, 2009 5:18 PM | 2 Comments | No TrackBacks
LED stick lamps.jpgSomehow I don't think these red or black "Supercool" lamps will catch on. Neat idea, but...

The key selling point is that they are flexible - both adjustable in height and rotatable, through 360 degrees. You can see more detail on the hansandfranz website.

supercool joint.jpg"Designed by Germany's hansandfranz for Macrolux, writes Technabob, the Supercool lamp features a dynamic, adjustable structure that lets it fit just about anywhere. The structure of each Supercool lamp is based on a telescoping aluminum pole that can be set to a wide variety of heights and angles with ease."

Lumileds has an automotive four die LED in its headlights

By Alun Williams - Electronics Weekly.com on September 11, 2009 10:59 AM | No Comments | No TrackBacks
Lumileds LUXEON Altilon.jpgLumileds has announced a four die LED for automotive headlights, writes our Technology Editor Steve Bush.

Based on the firm's 'thin film flip chip' die and dubbed Altilon, Lumileds is claiming up to 850 lm and 60 million cd/m2 at 1A.

You can read a PDF on the LUXEON Altilon.

Continue reading Lumileds has an automotive four die LED in its headlights.

LED Dragonfly street lighting, with camera

By Alun Williams - Electronics Weekly.com on September 9, 2009 2:29 PM | 2 Comments | No TrackBacks
led dragonfly.jpg
We've been writing about the rollout of LED streetlights, well, why not go the whole hog and have LED Dragonflies atop the lamps?

Note, however, they also conceal cameras for eyeing the street below. Street art and security benefits...

See these efforts, apparently from Seoul, South Korea (thanks to www.newlaunches.com for this one).
Continue reading LED Dragonfly street lighting, with camera.

Rollout of LED street lighting goes strong in Portugal

By Alun Williams - Electronics Weekly.com on September 7, 2009 12:17 PM | No Comments | No TrackBacks
Check out our Distribution World blog for an update on the progress of LED streetlighting in Europe - LED Lighting Watch: Portugal turns on 10 cities

The rollout of LED street lighting has been going strong in Portuguese towns all summer, writes Richard Wilson.

Continue reading Rollout of LED street lighting goes strong in Portugal.
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Author Profiles

Paul Ward
As Opto Product Manager at Farnell, Paul is overseeing the company's involvement in the rapidly evolving and high profile LED lighting market sector.

As well as ensuring that Farnell offers the latest technologies and products related to solid state lighting, Paul is also responsible for ensuring that the resources are in place to make it easier for design engineers to specify and design-in LED solutions for their applications.

Educated in Production Engineering and Design at Sheffield Hallam University, Paul has worked in various engineering, training and marketing roles for companies including C&K switches, ITT Cannon, Cherry and LED specialist Chicago Miniature Lighting.

Away from the world of LEDs, Paul is a Founder of the charity RTTW, Photographer and Harley Davidson rider; he has ridden and snapped across Europe, New Zealand and the USA on his chrome hog!

Gordon Routledge
Gordon Routledge is one of the original pioneers in LED illumination having worked with LEDs in illumination applications since 1996. Currently VP of Illumination at Dialight, Gordon founded Lumidrives in 2001, having previously been managing director at ACDC Lighting Systems. Gordon has a degree in Electrical & Electronic Engineering from university of Manchester Institute of Science and Technology.

Ian Bryant
ian bryant.jpgIan Bryant is Business Development Manager LED Division at Carclo Technical Plastics. He has worked on and off at Carclo (Formerly Combined Optical Industrial) since leaving school. He has worked through the company from Toolmaking to starting the company on the road of LED optics business some 6-7 years ago, starting with a standard range and more in line with the business of custom optics. In between all this he has worked in engineering and as a works Director for a hydraulics company but kept getting pulled back to the optics industrial. We are able to offer the full solution from idea to parts so have a very good understanding on what is needed. You will see some posts from our design team also under my name.

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About this Archive

This page is an archive of entries from September 2009 listed from newest to oldest.

August 2009 is the previous archive.

October 2009 is the next archive.

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