Wish you had a skylight, but don't have the ability to cut a hole in your roof? MAKE subscriber Chris did to, and wrote in to share his solution to the problem: a pv+led-based 'fake' skylight. The concept is pretty simple, but with a nice result. He had some unused capacity on his PV (photovoltatic) solar panel, and basically hooked up a bunch of high power LEDs directly to it. To achieve the 'skylight' look, he built a custom metal box with a glass diffuser screen, and mounted the diodes inside of it. He has a nice write-up on his site, along with a calculator to determine how the LEDs should be connected. Excellent work!

I love this. Instructables user wholman has gathered together a bunch of scrap wood from "dumpsters, back alleys, vacant lots, abandoned buildings, recycling yards, and architectural salvage centers" and laminated it together using all-thread. Then he's very carefully smoothed and polished only one side of the finished block, leaving the underside rough to show off the process. Beautiful.

Paul Overton calls this great round-up of creatively reused rolling stock from Web Urbanist a "megapost." I like that term. There's railroad-car homes, offices, hotels--even a railroad-car footbridge. [via Dude Craft]

Capturing the same powerful forces that destroyed the Tacoma Narrows Bridge shortly after it was built in 1940, researchers at the University of Michigan are developing a new way of generating electricity with the slow moving currents found in most of the rivers and oceans of the world.

VIVACE is the first known device that could harness energy from most of the water currents around the globe because it works in flows moving slower than 2 knots (about 2 miles per hour.) Most of the Earth's currents are slower than 3 knots. Turbines and water mills need an average of 5 or 6 knots to operate efficiently. Michael Bernitsas

Michael Bernitsas, professor in the Department of Naval Architecture and Marine Engineering, stands before a prototype of his VIVACE hydrokinetic energy device.

VIVACE stands for Vortex Induced Vibrations for Aquatic Clean Energy. It doesn't depend on waves, tides, turbines or dams. It's a unique hydrokinetic energy system that relies on "vortex induced vibrations."

This technology is hoped to be easier to site than traditional windmills and hydropower generators. [Thanks, Amon!]

William Kamkwamba, is a senior at the African Leadership Academy, a pan-African high school in Johannesburg, South Africa. A 2007 and 2009 TEDGlobal Fellow, Kamkwamba has been profiled on the front page of the Wall Street Journal and his inventions have been displayed at Chicago's Museum of Science and Industry. He's often invited to tell his story at such venues as the World Economic Forum in Africa, CES, Aspen Ideas Festival, Maker Faire Africa and the African Economic Forum.

During the evening, William was introduced by Amy Smith, and spoke with his coauthor Bryan Mealor, an American journalist covering Africa. Together, they told stories of life in Malawi and William's experiences making and fighting to learn in the midst of a devastating famine.

After the break, there is more video from the evening.

Here's what looks like a great, culturally sensitive way to tear down old buildings. D-Build, a project started in Syracuse, NY, is aiming to document and catalog entire decommissioned buildings as they are taken apart.

All well and good, but what does this have to do with makers, you ask? Well, the other half of their equation is to provide a market where you can purchase the raw materials taken from the houses, and even sell things back that were made with them.

This seems like a excellent way to recycle usable building materials, that would probably otherwise just end up in a dump. [via core77]

Must. Resist. Yakov Smirnoff. Joke. This is a war memorial, after all, and to a particularly nasty bit of a particularly nasty war, at that. Still, in the same way that Italians can laugh about the fact that, yes, it can be a bit of a pain to renew your driver's license in Italy, or that Estadounidenses can admit that, yes, we have been known to occasionally over-commercialize certain things, even patriotic Russians will see that there is something of the stereotypically Russian in this story.

This memorial was erected in Ukraine shortly after WWII to commemorate the legions of fallen dead. For 50 years its eternal flame burned natural gas piped in under the Soviet administration. Then...well, things fall apart, as everyone knows. With the breakup of the USSR, the flow of free natural gas into Ukraine stopped and it became too expensive to keep the torch lit. I'm sure it was a sad day that finally saw the flame go out.

Apparently it sat unlit for several years until this compromise solution was achieved: The flame would be converted into a cell-phone tower, the antennae concealed by a round facade bearing a pixelated flickering LED-flame image funded by the cell-phone company. One of those capitalistic solutions where everyone wins, but only kind of.

To my eye, this is in awful taste. But the story, I think, is kind of beautiful. If it's really true that the only two alternatives were to leave the flame unlit or to replace it with a cheesy simulation, I think, ultimately, that I would have made the same choice. And as we continue to oxidize the world's supply of hydrocarbons, sooner or later the sensibility of keeping fossil-fuel flames burning "eternally," only for symbolic purposes, may well become an issue in other parts of the world. [via Hack a Day]

There's an odd synchronicity here with last week's post about the coin-scavenging-crow training machine. This time it's a whack-a-mole style video game that you play by dropping glass bottles into the slots when they light up. See it work around 0:40.

In a side note, Volkswagen's Fun Theory Award is now definitely on my radar. Besides this project, their competition to incentivize socially-useful behaviors by turning them into entertainment also produced the world's deepest rubbish bin and the subway staircase piano keyboard. [via Hack a Day]

A beautiful wooden radio from designers Solène Le Goff and Christophe Gouache. Solar and/or wind-up powered. [via Dude Craft]

Rochus Jacob designed this energy-harvesting rocking chair. It works by storing energy while you rock during the day, then lights up the attached OLED lamp at night. It is a neat concept, however there is no reason to wait for future technologies to build one. Just start with this human-powered fan design, add a small generator and a standard LED, grab your whittling project, and you should be set to go. [via gizmodo]

This is a really cool idea, an open source project dedicated to the idea of tracking, documenting, and mapping where all of the components for our everyday goods come from. It's supply chain transparency. [Thanks, Laura Cochrane!]

SourceMap - Visualizing Supply Chains

Josh Klein developed a machine that trains crows to trade coins for peanuts. Literally, for peanuts. So you fill this thing with peanuts and set it out, say, in a public park, and the crows will scour the ground for loose change, carry it to the machine, and drop it in a slot in exchange for food. The project, dubbed "CrowBox," made a big splash when he unveiled it back in 2007. Now he's made the complete plans for the CrowBox freely available online so you can roll your own. And there's no reason you couldn't train your fly-monkeys-fly to gather other crow-portable objects. Twenty-dollar bills? Keys? iPods? Human eyes? The possibilities are endless. Set one up at the beach! Train seagulls to trade whole wallets for pre-shucked oysters!

The onslaught of DIY iPhone stands continues. This time around we find ourselves in a cafe with a warm beverage and the need to watch BMX stunt videos. Luckily we remembered to bring along our nice utility scissors and the Barista was kind enough to include a cup sleeve with the drink. The overall execution and reuse of recyclables on this project should gain high marks for those keeping score at home.

Features

• The book includes 40 projects using green techniques with step-by-step instructions, as well as illustrations and directions for an Earth-friendly existence.
• Projects are enjoyable for kids and also engaging for adults.
• Made from 100 percent usable information that really does conserve energy and improve the way we live.
• Contains sneaky things we can do to go green and includes a helpful energy reduction section that is full of tips and resources, making energy conservation easy.

The OLPC Afghanistan team rigged up this pedal-powered generator for the OLPC. Using the generator from their Freeplay hand crank, the system is set up so that students can actually generate enough electricity to power the computer while they are using it.

It's a pretty simple setup, but seems to make sense in this context. Anyone want to set up a 'green' coffeeshop filled up with these things? [via neatorama]

Almost every time I go out to the beach I notice something somebody has made out of driftwood. This can range in size from the delicate ornamentation of sandcastles to massive driftwood forts. It's as if we're programmed to take advantage of this abundant natural resource the instant we come in contact with it. The compulsion to fabricate something with your bare hands out of a couple of weathered sticks and whatever's laying around can be overpowering. Once I carved a functioning flute for no apparent reason.

Heeding the call of stonewashed lumber, experimental musical instrument maker Bart Hopkin and his percussionist friend Joyce Kouffman head out to the beach in this video to show us how to build a driftwood xylophone. [Thanks, Sara!]

Real time power monitoring has been proven to effectively reduce power consumption due to waste. It is intuitive to consider that humans need some sort of feedback in order to recognize the presence of waste. For example if one leaves the faucet open one has sound and sight feedback indicating there is waste. What sort of feedback do we have for electricity? None really, this is why these systems can help with waste reduction

The system uses images from a camera to track changes on the power meter, which is then fed through the network, converted to data and ported to the Google Powermeter. The data can then be viewed online from any browser. The history page gives some more context on the data. Check out more about the project's impact on the Analysis page.

The data can be sent to any device as long as the device has internet access and can read a RSS feed. So a web browser can display it, as well as a cell phone that has internet access. The data that the Chumby takes comes from this address. The Chumby application is a simple flash movie that reads from the above RSS feed and displays the data. The color changes from green to red as we use more electricity, so at night, the text will be green/yellow. This is a link to the exact same flash movie that is running on the Chumby. It updates in real time. The data is being served from a web server I built.

More:

• Chumby guts -- so delicious!
• Smart grids, smart metering, and Make: Green
• Home automation gear
• Energy auditing for greater efficiency

Check out this solar food deydrator made from reclaimed materials, and get started on your dried fruit recipes!

I'm really digging all the manly knotwork going on over at Stormdrane's blog.

More paracord goodness from Stormdrane.

Okay, MichaelLubke is officially my favorite reader ever. In response to my recent post speculating about mechanical gate openers, not only did he run out and snap some photos of a working "Gandy Slide-A-Way" near his ranch, but in response to appreciative comments from our readers he went back and got this video of it in operation. Awesome! Look at it go! Thanks so much Michael!

This is a solar panel. Really. If you've observed that it looks a lot like a piece of live-edge fluorescent acrylic, you're more than halfway to understanding how it works. Light entering the panel from the sides is absorbed by dyes and converted, by some fancy top-secret nano-metal whatnot ingredients, into a kind of internal re-radiation that is collected by conventional silicon applied only at the edges. Fair warning: Full science-hype disclosure rules apply here. The responsible party is Israel's GreenSun, and they do not have a product at market yet. But The Economist seems to be buying in, and their ethos is good for a click or two, in my book.

How do you photograph a 300' tall tree in a dense forest with no clear sight lines? Wildlife photographer Michael Nichols did it by taking a bunch of close-ups using a special camera rig and stitching them together digitally. NPR has the full story. [via Hack-a-Day]

Almost 100 years ago, John Krubsack made this amazing chair by growing a bunch of box elder trees together. What makes this extra special is that he figured out how to graft the trees together as they were growing, so that they naturally formed all of the joints to hold it together. The whole thing took about 11 years to grow. In this age of rapid prototyping, I can hardly imagine spending that long on a project. It just might be possible, however, to make a miniature version for a mouse out of some brassica rapa plants.

Oh, and if you are looking to raise your own furniture, treehugger has some plans to grow
a three-legged stool.

[via neatorama]

I reviewed The Boy Who Harnessed the Wind for Good. I think it's one of the best books I've ever read. Here's an excerpt of my review:

William Kamkwamba's parents couldn't afford the $80 yearly tuition for their son's school. The boy sneaked into the classroom anyway, dodging administrators for a few weeks until they caught him. Still emaciated from the recent deadly famine that had killed friends and neighbors, he went back to work on his family's corn and tobacco farm in rural Malawi, Africa.

With no hope of getting the funds to go back to school, William continued his education by teaching himself, borrowing books from the small library at the elementary school in his village. One day, when William was 14, he went to the library searching for an English-Chichewa dictionary to find out what the English word "grapes" meant, and came across a fifth-grade science book called Using Energy. Describing this moment in his autobiography, The Boy Who Harnessed the Wind (co-written with Bryan Mealer), William wrote, "The book has since changed my life."

Using Energy described how windmills could be used to generate electricity. Only two percent of Malawians have electricity, and the service is notoriously unreliable. William decided an electric windmill was something he wanted to make. Illuminating his house and the other houses in his village would mean that people could read at night after work. A windmill to pump water would mean that they could grow two crops a year rather than one, grow vegetable gardens, and not have to spend two hours a day hauling water. "A windmill meant more than just power," he wrote, "it was freedom."

For an educated adult living in a developed nation, designing and building a wind turbine that generates electricity is something to be proud of. For a half-starved, uneducated boy living in a country plagued with drought, famine, poverty, disease, a cruelly corrupt government, crippling superstitions, and low expectations, it's another thing altogether. It's nothing short of monumental.

Read the rest of my review at GOOD.

William Kamkwamba visits Baobab Health Trust founder and TED Fellow Gerry Douglas' home in Lilongwe, Malawi. Gerry is giving William a lesson in machining helicopter and windmill blades with various types of cutters. (It was very exciting to read that William's favorite magazine is MAKE!)]]> <a href="http://blog.makezine.com/archive/2009/09/the_boy_who_harnessed_the_wind_--_f.html" />Read more</a> | <a href="http://blog.makezine.com/archive/2009/09/the_boy_who_harnessed_the_wind_--_f.html" /> Permalink</a> | <a href="http://blog.makezine.com/archive/2009/09/the_boy_who_harnessed_the_wind_--_f.html#comments" />Comments</a> | <a href="http://blog.makezine.com/archive/green/" />Read more articles in Green</a> | <a href="http://digg.com/submit?url=blog.makezine.com%2Farchive%2F2009%2F09%2Fthe_boy_who_harnessed_the_wind_--_f.html&title=The%20Boy%20Who%20Harnessed%20the%20Wind%20--%20fantastic%20new%20book%20ab&bodytext=%20I%20reviewed%20The%20Boy%20Who%20Harnessed%20the%20Wind%20for%20Good.%20I%20think%20it%26apos%3Bs%20one%20of%20the%20best%20books%20I%26apos%3Bve%20ever%20read.%20Here%26apos%3Bs%20an%20excerpt%20of%20my%20review%3A%20William%20Kamkwamba%26apos%3Bs%20parents%20couldn%26apos%3Bt%20afford%20the%20%2480%20yearly%20tuition%20for%20their%20son%26apos&topic=tech_news" />Digg this!</a> http://blog.makezine.com/archive/2009/09/the_boy_who_harnessed_the_wind_--_f.html http://blog.makezine.com/archive/2009/09/the_boy_who_harnessed_the_wind_--_f.html Green Tue, 29 Sep 2009 10:57:36 -0800 Figure 204 shows a gate balanced in a similar manner, and arranged so it can be opened by a person desiring to drive through, without leaving the vehicle. It is suspended by ropes which pass over pulleys near the top of long posts, and counterpoised by weights upon the other ends of the ropes. Small wheels are placed in the ends of the gate to move along the inside of the posts, and thus reduce the friction. The gate is raised by means of ropes attached to the center of the upper side of the gate, from which they pass up to pulleys in the center of the archway, and then out along horizontal arms at right angles to the bars which connect the tops of the posts. By pulling on the rope, the gate, which is but a trifle heavier than the balancing weights, is raised, and after the vehicle has passed, the gate falls of itself. In passing in the opposite direction, another rope is pulled, when the gate is raised as before.

In an age of ubiquitous electronics and electromechanical systems, I think it's easy to forget that we don't necessarily need electricity for everything. I'm no Luddite, by any stretch of the imagination; I just think some problems are more sustainably and elegantly solved with purely mechanical devices.

Take the problem of opening a gate from a vehicle. Both my father and my brother live on gated properties, not because they're rolling in so much dough, but because they live out in the sticks and keep livestock and pets that they can't have wandering off. So they've both got vehicle gates in their fences, and both gates are well removed from any source of municipal electricity.

Dad went to considerable expense to install an electric gate opener powered by a lead-acid battery kept up by a solar panel, which works just like a suburban garage door opener. Very convenient, in use, but expensive to install and with considerable maintenance troubles associated with the battery and the solar panel and the motor and the mechanics. My brother, on the other hand, opted for the minimal solution and has no opener at all. When he leaves in the morning and when he gets home at night, he has to stop at the gate, get out of the car, open the gate, drive through it, stop again, get out again, close the gate, and get back in the car before continuing on his way. A low-cost solution with basically zero maintenance, but he pays for it with inconvenience.

Personally, I've always thought an intermediate solution would suit them both better--something purely mechanical, that would be cheaper and hardier than the radioservomechanical rig my Dad installed, and yet considerably more convenient than the get-out-and-do-it-yourself approach my brother has taken. Then last weekend I was browsing a use bookstore and happened upon a copy of George A. Martin's Fences, Gates, and Bridges and How to Build Them, first published in 1900. It included the diagram shown above, with the accompanying explanation:

Figure 204 shows a gate balanced in a similar manner, and arranged so it can be opened by a person desiring to drive through, without leaving the vehicle. It is suspended by ropes which pass over pulleys near the top of long posts, and counterpoised by weights upon the other ends of the ropes. Small wheels are placed in the ends of the gate to move along the inside of the posts, and thus reduce the friction. The gate is raised by means of ropes attached to the center of the upper side of the gate, from which they pass up to pulleys in the center of the archway, and then out along horizontal arms at right angles to the bars which connect the tops of the posts. By pulling on the rope, the gate, which is but a trifle heavier than the balancing weights, is raised, and after the vehicle has passed, the gate falls of itself. In passing in the opposite direction, another rope is pulled, when the gate is raised as before.

Googling around reveals, of course, that nobody is selling any such device, that I can find, so if one wanted one it would have to be a custom job. I wonder about the possibility of a system that uses the weight of the vehicle to trip the mechanism instead of a rope. Anybody seen a purely mechanical gate opener in real life?

Spotted this sexy commercial electric bicycle in a back issue of Popular Science at the barber shop today. It's called Pi, and the company that makes it is based out of San Francisco. The magazine article claims it uses a Nu Vinci continuously-variable transmission but the official company specs now only mention a Shimano 8-speed. Sounds like they're still working out the kinks. Something to keep an eye on, though.

Alexis Belonio is an associate professor in agricultural engineering at the Central Philippine University of Iloilo City. In 2008 he received a Rolex Award for Enterprise for a rice-husk-burning stove he designed. Belonio's stove is not complicated, either mechanically or conceptually: A columnar metal burner with the addition of a small intake fan at the base to tip the stoichiometry of combustion towards oxidation, giving a blue, clean, efficient flame that leaves little or no residue. Traditional rice husk burners, by contrast, do not have this forced-air feature and produce a yellow, dirty, inefficient flame that leaves tar behind. The upshot is more efficient use of rice husk biomass and greatly reduced pollution from the many rice-husk burners in use today.

Looking to increase his atmospheric lighting options, maker Jeroen Domburg built this wirelessly controlled RGB LED light bulb using an ATTiny44, RGB LED emitter, USB-PSU, and 433MHz RF receiver. The whole thing managed to fit inside a standard CFL housing and cost slightly less than a retail version.

[via hackaday]

Although there aren't specific directions on how to make one, the image above does make it look easy. via - DIYPhotography

In the Maker Shed:


High-Speed Photography Kit Version 4