HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Cabe Atwell
User Rank
Blogger
Re: Long Life
Cabe Atwell   1/20/2014 5:37:11 PM
NO RATINGS
I recently purchased a Fenix PD35 850 lumen LED flashlight and it comes with a warning label that it becomes hot to the touch after running on full for a period of time. After that time period comes, the micro-circuitry powers it down to the next highest setting (and so on) in order to prevent damage. Good article on the subject.

Greg M. Jung
User Rank
Platinum
Long Life
Greg M. Jung   12/24/2013 5:37:03 PM
NO RATINGS
Great discussion on the finer points of LED design considerations.  Also, in addition to price drop, in many cases LED's can also offer the advantage of longer life over the other technologies that they are replacing.

mrdon
User Rank
Platinum
Re: Dealing with LED temperature
mrdon   12/22/2013 2:17:25 PM
NO RATINGS
Rob

I agree. This Mentor Graphics LED Thermal/Performance analysis software package would have been great to use when I was developing LED lighting fixtures while working at Hunter Fan. This data would have served as a baseline while taking actual thermal and lumen measurements using an Integrating Sphere. Management of thermal and lumen performance of LEDs is quite a challenge especially when you have to add the SMPS (switching mode power supply) LED drivers heat dissipation data using a per-square inch pcb in to the overall thermal equation. Nice article! 

Rob Spiegel
User Rank
Blogger
Dealing with LED temperature
Rob Spiegel   12/4/2013 10:41:57 AM
NO RATINGS
Nice article on the challenges of working with LED lighting and temperture variances.



Partner Zone
Latest Analysis
Kaspersky Labs indicated at its February meeting that cyber attacks are far more sophisticated than previous thought. It turns out even air-gapping (disconnecting computers from the Internet to protect against cyber intrusion) isnít a foolproof way to avoid getting hacked. And Kaspersky implied the NSA is the smartest attacker.
Counterfeit parts are an increasing problem. Eaton has launched a program to educate buyers in identifying counterfeit electronic components.
If the deal is approved, the companies would create a top-10 chip maker and embedded processor giant with more than $10 billion in combined revenue.
It's the Batsuit Gotham needs. An industrial design student's Batsuit can protect would-be vigilantes from fists, blunt objects, and knives.
Two independent purchasing managers indexes (PMI) released today (March 2), revealed conflicting pictures on the direction of the US manufacturing sector in February.
More:Blogs|News
Design News Webinar Series
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Mar 9 - 13, Implementing Motor Control Designs with MCUs and FPGAs: An Introduction and Update
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service