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Fun demonstration by NOPEC (Northeast Ohio Public Energy Council) at the Cuyahoga County Public Library branch in Strongsville yesterday. As I pedaled, a generator on the rear wheel of the bicycle produced electricity to light the lights. The LED bulbs are easy! The compact fluorescents take slightly more effort. And the (70 watt?) incandescent bulbs are way harder. Also, electrical resistance makes the bike harder to pedal.
LED Lighting Samples. I recently bought a set of LED lights and spend some time experimenting with the lighting
Thx to Jediimind, LED Eddie, TCB, Dennis Calvert - i wouldn't got this without you! You guys rock for sure! Hope we all meet up some day - the round's on me then! =)
The world class boanical collections in Waimea Valley owe there existence to Mir. Keith Woolliams, a dedicated botanical horticulturist who was trained at the Royal Botanic Garden at Kew, on the outskirts of London.
Keith led a rich life traveling around the globe studying botanical collections in England, Japan, Papua New Guinea and Bermuda. He brought to Hawaii his expertise and knowledge of uncommon horticultural treasures, and he acquired seeds, plants, and cuttings from remote places and botanical gardens all over the world. In pre-internet days dozens of letters and packages were dispatched and received daily.
His theme of "Conservation Through Cultivation" resulted in a balance of rare and useful native and Polynesian-introduced plants among exotic horticultural specimens.
What was once an ungroomed valley, filled with koa haole and ravaged by feral cattle was transformed into what you see today by Keith and the many dedicated people he inspired. They oversaw the design, landscaping and construction of the pathways, stone walls and stairs that frame the gardens. Keith's high standards for record keeping and signage persist to this day. He left us in 1998 with a library full of his propagation knowledge, cultivation practices and plant lore which survives to ensure that the precious life forms brought to this valley will thrive here long into the future.
Keith was an inspiring advocate for Hawatian plant conservation and he influenced many young people across the state. He connected Waimea with state, federal and international agencies such as the Center for Plant Conservation, the International Union for the Conservation of Nature, and the Botanical Gardens Conservation International - partnerships that Waimea Valley continues to uphold today.
Keith was instrumental in bringing in critically endangered plants from Japan's Ogasawara Islands, hibiscus relatives from all over the world, and with international colleagues he tried to assemble wild-source collections of every species of Erythrina in the world. In the periodical, "Notes from Waimea Arboretum and Botanical Garden" published twice a year until 1992 he stated "Waimea is a labeled and documented collection of plants for educational and scientific purposes, a living gene pool for future generations".
It is with great honor and gratitude that we remember Mr. Keith Woolliams and his dedication to Waimea Valley.
Lenore demonstrates the motion-sensitive nature of the coffee table.
The interactive coffee tables are a collaborative effort between Because We Can and Evil Mad Scientist Laboratories.
I use battery-powered push-LEDs such as these most often for backlighting but occasionally for lighting the subject as well. Each is about 2 1/2 inches across. They produce a blue tint and a somewhat diffused light.
If you're curious, check out more of my Gear.
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Purchase this image and learn more about it at the source.
Source: photos.jdhancock.com/photo/2010-08-05-220309-pushleds.html
Under the direction of Jimmy Page; who also took care of all the remastering, Led Zeppelin undertook a reissue programme of their back catalogue earlier this year. Apparently the classic; in many peoples' minds their best album, IV (or 4 Symbols or whatever) and Houses of The Holy are to be reissued sometime soon (now?). The first 3 albums (I, II, III) were reissued a couple of months back. These reissues come in several formats -from simple CD to Super Deluxe Boxsets. These latter formats have the proverbial everything-but-the-kitchen-sink included with them. Like with most "remasters" reissues people should ask these questions before thinking of buying them:
-Do they sound any better than the original vinyl?
-Are they just cashing in on the gullibility / credulity of some people that are willing to pay cash for something that they probably already possess several times over?"
-How many times have these albums been previously "remastered" and reissued?
-Are the boxsets, or deluxe editions, worth the price and do I really need an additional disc "of previously unreleased companion audio" (sic)?
Personally, I won't be buying any of them.
Just got this color changing LED jump rope! And it turns out to be quite amazing :)
Tripod - handheld motion
(...this is actually a "High School Musical" branded thing, I found in a toy store today)
Led Zeppelin, Musikhalle Hamburg, März 1973: Robert Plant
Copyright: Heinrich Klaffs
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Led flash module. Inside the opening for the Mitutoyo 10X lens. The 12 power leds are not solderd but connected via 24 x M2 brass screws which press on the led contacts. I can even modify LED types with the same module.
The 12 LEDs are divided into 6 groups. Each time there are two LEDs connected together on the PCB. LEDs shine through the 12 holes of 8mm diameter each. Each group can be controlled separately. The direction and amount of light may be a result set.
The base plate is made of aluminum for cooling. The back of the LEDs have an additional thin special thermal film of 0.2mm in order to have good thermal conductivity. The LEDs can operate continuously at full power.
Driver module: www.flickr.com/photos/fotoopa_hs/15765655185
Step 3: Insert your on/off tab (larger piece of cardstock) in between the LED's wire and the + terminal of the battery.
Testing Adafruit's LED strip with a Bus Pirate, and a Teensy 2.0. All on at 0xFF brightness is 3A @ 5V = 15 W.