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
4/29/2013

One you plug the gadget into a wall outlet, you can plug your LED string into the female receptacle.
One you plug the gadget into a wall outlet, you can plug your LED string into the female receptacle.

Return to Article

View Comments: Oldest First|Newest First|Threaded View
Page 1/6  >  >>
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.

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.

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!

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?

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?

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

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.

greg
User Rank
Iron
Re: Product improvement
greg   4/29/2013 10:55:16 PM
NO RATINGS
the lifespan of LEDs is freakishly long as it is. shortening it to, say, a quarter, would likely still outlive any of us.

no, i havent done the math.,,

TJ McDermott
User Rank
Blogger
Re: Product improvement
TJ McDermott   4/29/2013 11:02:32 PM
NO RATINGS
The answer to just about any why question in this context is going to be money.  Granted, the rectifier is quite inexpensive.  The margin on such products is probably quite low - adding the rectifier while staying cost-competitive won't work.

There's also the cost of getting this now-new product tested by UL so a company can affix the all-important UL label.

OR, the company can just counterfit the label...

AnandY
User Rank
Gold
Re: Product improvement
AnandY   4/30/2013 2:14:46 AM
NO RATINGS
Today LED lighting is not limited to festival lightings, they are also used in day-today life. old-fashioned incandescent or harsh fluorescent are replaced by bright and shiny new LEDs. The local supermarket, the office where you work, the train station, restaurant or department store—all of these businesses are seeing the benefits of this rapidly developing technology. The light produced by LED bulbs is brighter and warmer and more focused than ever before, and business owners love the savings to their energy bills.

Page 1/6  >  >>
Partner Zone
More Blogs from Gadget Freak
This Gadget Freak Review looks at an affordable plug-and-play printer, a 3D printer that was hacked by a group of French design students to create real tattoos, and an analog camera that was built using 3D-printed and laser-cut parts.
What youíll find in this Technology Roundup is the best of the best Gadget Freak projects, as voted on by you -- our loyal readers.
We look at a wearable device that uses an adhesive electrode and headband to help reduce migraines, as well as a plug-and-play outlet cover that replaces traditional night lights.
Al Linke's animated weather display uses a Rasberry Pi to periodically pull weather conditions from the Internet and then displays a corresponding animation on an LED display.
This Gadget Freak review looks at a personal motion tracking device that uses Bluetooth a DIY solar phone charger that is built in a mint tin and only costs $7 to build.
Design News Webinar Series
3/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
2/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
12/18/2013 Available On Demand
11/20/2013 Available On Demand
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Apr 21 - 25, Creating & Testing Your First RTOS Application Using MQX
SEMESTERS: 1  |  2  |  3  |  4  |  5


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.
Next Class: April 29 - Day 1
Sponsored by maxon precision motors
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service