Quantsuff emailed us a link about a new material summarized at Newscientist.com. I have a few thoughts that I’d like to add. The stuff should be great for illumination. But I have doubts about its use for display purposes. Displays have millions of very small pixels. If one or a few get contaminated with dust
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I got another email from Designing With LEDs about removing the fluorescent lights from a bathroom and replacing them with Cree LED lights. The blog shows the charts from a spectrometer showing the difference between the fluo lights, which are deficient in the red, and the high CRI LED lights which have much better lighting
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QS sent this link to me about Osram’s smart LED light called Lightify. I went and browsed the shelves at Fry’s Electronics. They have the dimmer sockets and remotes on the shelf that use Sky Link.
A new store opened up a few weeks ago in my neighborhood. It’s called Daiso and is much like a dollar store except (unless otherwise marked) everything is $1.50. It helps if you can read Japanese because many of the items are labeled in Japanese. I bought a ‘Hand Pressing Flashlight’ with 2 white LEDS,
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I got some 1 watt LEDs from Goldmine Electronics for 5 for $10 (They were on sale when I bought them). These are LEDs that do not have a mounting bracket, but were made for surface mounting. I’m not sure if the case itself is supposed to be held to the PC board only by
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I’ve thought about putting a series string of LED lamps into a Moebius Loop to make a free energy generator. No telling if the thing will work. 😉 The LEDs I bought a box of 100 Sencart LEDS from dealextreme.com more than a month ago and they finally arrived this week. The cost was under
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I built this special Joule Thief a while ago, and I don’t remember if I wrote a blog about it. I wound the two normal windings on the toroid core, then I wound a third winding of 20 turns for driving the LED. But instead of driving the LED directly from the transistor, I connected
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I have made an assortment of LED task lights that I’ve clipped onto places where I need a small, low power light, such as my keyboard, workbench and kitchen counter. They typically have 3 or 4 LEDs and run off an AC adapter of about 5 volts. I want to make a lamp with multiple
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LED bulb prices are still coming down, but the general public is still not aware of the advantages and still think the prices are too high. And the public is still unaware of the long term savings in electricity from which they’ll benefit. I still see 60 and 75 watt incandescents in dollar stores, which
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My (ex) co-worker, Howard, emailed me a link to an article that said that the Nobel Prize in physics has been given to three inventors of the blue LED. As everyone knows, the LED is a major topic of my blog. This article excerpt says that 2015 is the International Year of Light. We have
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