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May 31, 2010

Test engineer’s Mini-Trebuchet build

Filed under: Computers — admin @ 11:00 pm

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Solar & astrophysics test engineer Hank Hancock saw a comment on our Mini-Trebuchet post about how to improve the throw distance, and put up his hand to try it out. We sent him a kit, he’ll be building and documenting the before-and-after effects of adding wheels to the design.

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His first update is on putting the stock kit together.

Recieved the kit last week and finally was able to get started today, with the help on my daughter, Melissa, and her boyfriend, Sam. Photo shows the kit as it comes out of the box. Since we had the three of us, I had the teenagers remove the pieces while I got started on removing the tabs left over. A simple sanding with an emery board (regular sandpaper will do) made quick work of it.

Once the pieces were loose, the Sam & Melissa began gluing parts together. The entire process probably took all of about one hour.

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Even though we followed the directions for making the basket, it did not seem to work as well as I wanted. To help the basket hold the projectile, we added some staples to give it a more “bowl” shape. I think I might find myself a small piece of cloth or leather to make the basket out of, instead of the netting that is provided in the kit.

Looking good, Hank, we can’t wait to see more!

In the Maker Shed

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Mini-Trebuchet kit in the Maker Shed

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Sew your own bike cap

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MZ_AltTransportation-Badge.gifBy way of Paul Overton and DudeCraft comes this oldie but goodie, a simple but natty cycling cap you can sew yourself.

Panda Face’s Cycling Cap

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Happy Memorial Day!

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The RUB Chopper, made by Orange County Chopper, for RUB in NYC.

We hope our readers in the States are having a wonderful day with family and friends, celebrating Memorial Day (and thinking about all of those who’ve come before us and made our lives possible through their sacrifices).

If you’re doing some chillin’ and grillin’ today, here’s our coverage of grilling and grills on MAKE and CRAFT, if you need a little inspiration.

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North-finding LED skirt

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Meredith Scheff shows off her LED compass skirt at Maker Faire Bay Area 2010 in this week’s CRAFT Video.

Meredith sells a solderless “Star Board” soft circuit kit based on her sew-through circuits technique, which includes everything you need to get started on a project like this.

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ButlerBot serves cans from RoboFridge

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Steve Norris of Boston, MA, wrote in with his latest project: a robot that’ll bring you a beer.

The Beverage Delivery System (BDS) is an ambitious project of mine to create a fully automated inter-home delivery system. Anyone who has built a robot has, at one point or another, been asked the question “but can it bring me a beer?”; I’m sure that like me, roboticists all over the world have grown weary of this question. The Beverage Delivery System is the answer to this age old problem, a problem that has plagued mankind since the invention of the canned beverage.

Baxter is the transport component of my Beverage Delivery System (BDS). Supporting Baxter is a fixed location dispenser robot called RoboFridge. You can think of a RoboFridge as a kind of soda vending machine that does not require money. Like a real vending machine RoboFridge supports the dispensing of canned beverages. The concept of the BDS could even be extended to non-food items like medications, DVDs and books.

The BDS process starts when a user requests an item using a simple remote control. Baxter is activated from his sleep mode and navigates to RoboFridge using a variety of navigation techniques. These include dead reckoning using encoders, IR beacons, and line following. Once he arrives Baxter will initiate a docking sequence with RoboFridge. After docking, RoboFridge deposits the canned beverage into Baxter’s cargo area. Baxter then undocks and navigates back to the thirsty user to deliver the beverage.

Finally I can get a frosty cold beverage delivered to me in my favorite easy chair without any effort or argument!

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Shelf made from back issues of National Geographic

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Not exactly practical, but certainly clever, this shelf made from recycled magazines is by designer Sean Miller.

Sean coated the magazines with a a water/starch mixture and then he placed them under pressure for about a week to harden. Next he took a band saw to the consolidated stack and carved out space for a shelf. Holes were also cut into the bookshelf’s sides, allowing it to slide onto three rods to be hung. About 80 mags were used.

It’s another personal fave from among the finalists of Inhabitat’s second annual Spring Greening contest.

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XY plotter pr0n

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Riley Porter’s sweet plotter is built out of Contraptor beams and lasercut panels, and uses a custom stepper controller called TinyG. Next: can haz CNC?

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Lasersaur, an open-source laser cutter

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Following in the footsteps of Makerbeam, an open-source building set which got its funding on Kickstarter, and loom designers OSLoom, which got funded the same way, we have Lasersaur, a project to make an affordable laser cutter and then release the specs so that anyone can build one or improve on the design.

Here’s the thing. Laser cutters are traditionally expensive ($30,000 to as much as you can spend) and there are a lot of artist, hackers, architects, designers, DIYers who could do great things with them- if they could afford one, or even get regular access to one. Pretty much anybody who is a maker could benefit from a laser cutter. Unfortunately, turnkey systems are expensive, and there isn’t really a clear and simple way to build one. We can change this: with roughly six month of R&D time we can develop a laser cutter which anyone can build, use, and maintain. Most importantly this system will be open source which means anyone can improve and modify the design.

Everyone should be able to have a laser cutter! Our goal is to design a 100W machine which is capable of cutting 1/2″ (12.5mm) acrylic, wood, multiple layers of fabric or thin sheet metal.

Think the project is worth supporting? Make a pledge by July 8th.

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Lasercut chess set

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This excellent chess set definitely wins points for beauty.

My dad taught me how to make, create, design, build, program, and solder from a young age. This year I finally remembered that parents don’t like their children to buy them expensive things, they like their children to build them things. And you could end up making the worst looking thing ever, but they’ll love it, just because you made it.

Happy birthday dad.

Don’t worry, Peter, it looks great!

[Via MakerBot blog]

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So plus 30 and heat advisory, glad I’m in a big open room….with air conditioning….and surrounded by 4 computers…and more….tech stuff

Filed under: Online — admin @ 11:00 pm

So plus 30 and heat advisory, glad I'm in a big open room….with air conditioning….and surrounded by 4 computersand more….tech stuff

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