Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 3   >   >>
cafayzieg
User Rank
Author
re: Cree claims LED price-performance breakthrough
cafayzieg   10/22/2012 10:13:30 AM
NO RATINGS
I'm glad I can understand these products. Thank you for your article. http://www.league-soft.com

David Taylor
User Rank
Author
re: Cree claims LED price-performance breakthrough
David Taylor   10/15/2012 6:39:33 AM
NO RATINGS
Have a try of video converter : http://www.league-soft.com/how-to/convert-avi-to-mp4-mac.html

chinavibratingscreen
User Rank
Author
re: Cree claims LED price-performance breakthrough
chinavibratingscreen   9/21/2012 8:58:16 AM
NO RATINGS
Thank you for your sharing, it's very helpful. regards:httP//www.chinavibratingsieve.com

Larry.Cormier1
User Rank
Author
re: Cree claims LED price-performance breakthrough
Larry.Cormier1   2/13/2012 9:23:58 PM
NO RATINGS
The decision to go AC vs DC was made a long time ago. Of course, we would not go DC over the distribution network. However, we COULD have a low voltage supply and wire the light switches with a smaller guage wire, needing less robust switches. Perhaps a not trivial reduction in wiring costs, as copper has gone up dramatically. We would still have the AC for appliances and such. It would not be a big deal for new houses. This would mean 2 types of bulbs- DC for new, AC for old. This could be a show stopper due to manufacturers probable unwillingness to have 2 types. But, if LED is the way of the future, why not use it as close to the "raw" state as possible? Cheaper for product, less manufacturing cost, less copper cost, less wiring installation cost. And, less high voltage AC in the walls (BTW, I previously said DC for doorbell, incorrect. It is 12VAC, I think)

Bert22306
User Rank
Author
re: Cree claims LED price-performance breakthrough
Bert22306   2/13/2012 8:49:10 PM
NO RATINGS
??? Wouldn't it be infinitely less disruptive (and I mean that pejoratively) to stick diodes in the CFL instead, if they prefer DC? DC house current would mean that any appliance that doesn't require strictly 115 V would have to have a switching power supply. Not to mention, the electric utilities would have to co-locate gymongous rectifying circuits where they now have the final distribution transformers that go to 230 VAC. Which means, huge changes all over the distribution network. Not a trivial change.

Larry.Cormier1
User Rank
Author
re: Cree claims LED price-performance breakthrough
Larry.Cormier1   2/13/2012 7:37:05 PM
NO RATINGS
I have had somewhat the same results as DrQuine with CFL failures at home. In 2 years, I have replaces maybe 1/2 dozen bulbs out of the 30 or so that I have in service. If one researches, it appears that the failures are due to the electronics associated with start-up. In order to eliminate these issues, is there any effort to start wiring houses with DC for lighting? We already have DC for doorbells. This would be an easy extension, and would eliminate the cost of the start-up circuitry, and the associated failures.

Larry.Cormier1
User Rank
Author
re: Cree claims LED price-performance breakthrough
Larry.Cormier1   2/13/2012 7:29:43 PM
NO RATINGS
Accordiong to Cree, "The 231 was a lab/R&D result. The 162 is a commercially available product."

daleste
User Rank
Author
re: Cree claims LED price-performance breakthrough
daleste   2/13/2012 1:31:23 AM
NO RATINGS
Laser lights. Interesting. How is the light dispersed? I wouldn't want just one little dot of light in the middle of the room.

Bert22306
User Rank
Author
re: Cree claims LED price-performance breakthrough
Bert22306   2/12/2012 11:50:33 PM
NO RATINGS
We haven't anything remotely close to that. The CFL brands we buy are Sylvania or UtiliTech, which are sold at Best Buy. We've had much better luck than what you describe. Basically, one failure that was premature, within maybe less than a year, one failure in a couple of years (which is also premature, in my book), and the rest keep soldiering on for many years. As to going to laser lights, interesting concept. I wonder if the coherent nature of laser won't create some weird phenomena?

ramstar
User Rank
Author
re: Cree claims LED price-performance breakthrough
ramstar   2/11/2012 6:03:33 PM
NO RATINGS
Our electric utility companies distributed many CFL bulbs for free, or at greatly reduced cost when they first came out. The fact that each CFL contains a small amount of mercury makes them much less desirable than LED's when you take into account the disposal cost.

Page 1 / 3   >   >>


Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Radio
LATEST ARCHIVED BROADCAST

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.

Brought to you by:

Like Us on Facebook
Special Video Section
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
05:27
The LT8602 has two high voltage buck regulators with an ...
05:18
Silego Technology’s highly versatile Mixed-signal GreenPAK ...
The quality and reliability of Mill-Max's two-piece ...
01:34
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...
See the Virtex® UltraScale+™ FPGA with 32.75G backplane ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35