HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Gadget Freak

Gadget Freak Case #239: Bridge Rectifier Eliminates LED Light Flicker

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 6/6
notarboca
User Rank
Gold
Re: Product improvement
notarboca   4/29/2013 9:11:24 PM
NO RATINGS
Thanks Design News for bringing this modification to "light".  I'll be using this rectfier for holiday lights this season.

Debera Harward
User Rank
Silver
Re: Product improvement
Debera Harward   4/29/2013 7:05:10 PM
NO RATINGS
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
Blogger
Question
Charles Murray   4/29/2013 6:27:27 PM
NO RATINGS
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?

manning6
User Rank
Iron
Re: Product improvement
manning6   4/29/2013 6:02:56 PM
NO RATINGS
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?

NadineJ
User Rank
Platinum
Re: Product improvement
NadineJ   4/29/2013 10:40:47 AM
NO RATINGS
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!

naperlou
User Rank
Blogger
Necessary component
naperlou   4/29/2013 10:27:07 AM
NO RATINGS
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
Blogger
Product improvement
Rob Spiegel   4/29/2013 8:15:55 AM
NO RATINGS
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
More Blogs from Gadget Freak
Your cat demands to be fed on time. With some technical know-how and a 3D printer you can build your own automated cat food dispenser.
Design News has a long Gadget Freak history and today we revisit some of the more memorable projects that actually help solve problems.
Halloween will be here before you know it. And the zombie apocalypse may come even sooner. Best to prepare yourself by building your own security system to safeguard against the walking dead.
Need some security in your DIY workshop? Gadget Freak Ben Pawlowski and his team show you how to build a security camera/alarm modeled after the turret guns from the popular video game, Portal.
Here's a blast from the Gadget Freak past. Check out these gadgets, from telescope warming to keyboards on your fingers
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Sep 12 - 16, Analytics for the IoT: A Deep Dive into Algorithms
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


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

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service