<<  <  Page 6/6
User Rank
Re: Product improvement
notarboca   4/29/2013 9:11:24 PM
Thanks Design News for bringing this modification to "light".  I'll be using this rectfier for holiday lights this season.

Debera Harward
User Rank
Re: Product improvement
Debera Harward   4/29/2013 7:05:10 PM
Light emitting diodes are becomming very  popular these days people are using them instead of other lights because they are cost effective .Because leds are connected to the AC Supply it produces ripples at the outer end which results in flickering.Any light source which is connected to AC supply results in flickers.

However flickering can be reduced with different methods one method is to use high frequency switching supplies, which helps to reduce the AC component of the main supply and reduces the flickers but not all flickers are avoidable .Remaining flickers can be removed by attenuating g the AC component at  the output

Charles Murray
User Rank
Charles Murray   4/29/2013 6:27:27 PM
What a great idea. I do have a question, though. Does this mean that whenever I buy an LED light bulb and run it on AC, I will be subjected to the possibility of the headaches you describe?

User Rank
Re: Product improvement
manning6   4/29/2013 6:02:56 PM
This approach may well shorten the lifetime of the string of LED's. The LED's are brighter because the duty cycle has increased from about .5 too near 1, the average current has increased by a factor of 2 and device (LED) heating has certainly increased. It appears in the video that one of the LED's in the demo string of white LED's has been replaced with a red LED. Was this due to failure of the white LED operating under the more stringent conditions?

User Rank
Re: Product improvement
NadineJ   4/29/2013 10:40:47 AM
This is very cool.  I get mild headaches from LEDs as well.  I can see these selling quickly during the holidays.  Open the etsy store and start building inventory!

User Rank
Necessary component
naperlou   4/29/2013 10:27:07 AM
Bernard, this shounds like a necessary component.  I wonder that the manufacturers do not include it.This type of flicker is also something that makes CFLs unattractive to some people.

Rob Spiegel
User Rank
Product improvement
Rob Spiegel   4/29/2013 8:15:55 AM
This is one of those gadgets that improves on a commercial product. And it makes you wonder why this improvement was not part of the make-up of the original product. Nice job.

<<  <  Page 6/6

Partner Zone
Latest Analysis
A Frost & Sullivan study finds that increased cyber attacks are prompting a flurry of innovative protection tools.
Devices and interconnected systems are finding a foothold not only in our homes but in mainstream organizations. Here are three tips to mitigate the risk.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
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
3/31/2015 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 30 - Apr3, Getting Hands-On with Cypress’ PSoC
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