Sip-and-Puff Touchscreens And Grilled Meat During World Create Day

In the last few weeks, we’ve been seeing a remarkable growth in the entries to The Hackaday Prize. This is due in no small part to World Create Day, a worldwide celebration of building stuff. It’s a worldwide buildathon with hackerspaces all around the globe. Now we’re getting a peek at the results of these gatherings, the videos are posted, and we’re simply gobsmacked by what was created during World Create Day.

Spinal Cord Hacks

The gang over at the Blusson Spinal Cord Center in Vancouver put together a two-day event for World Create Day. The goal of this event was to build a lipsync; a device that enables people with limited use of their hands to use touchscreen devices. It looks like a ray gun, but it’s actually a sip-and-puff device entered into last year’s Hackaday Prize.

Gardening in Cyprus

The Limassol Hackerspace in Cyprus had what is probably the best World Create Day out of all the hackerspaces who took part. Why? Grilled meat, of course.

Instead of trying to improve the entire world, the team at the Limassol hackerspace decided to think locally. Improving their own hackerspace with an automated irrigation system for their vegetable garden, planting vegetables, and building a barbecue took up most of the events of the day. One member even built a few serving platters out of sections of a eucalyptus trunk. These sections of tree cracked, but with the clever application of a CNC router, this hackerspace was able to inlay a few butterflies in the wood. It looks great, and even better with a pile of skewered, grilled meat.

The Osaka Makers’ Space

A few of the members at the Osaka Makers’ Space — like most of us — are interested in miniature robot battles. The first part of the event was, of course, spent tinkering with these tiny robots. A few members of the space made a breakout board for a BLE module, coding it so it could be voice-activated. No, that’s probably not the best way to control a battling robot, but you should do what you want, not what other people think is best.

Also during World Create Day, a few members of the space built three tiny chairs for children. The kids, unfortunately, were busy watching Sesame Street. But hey, at least the screw holes were doweled up. Also on the roster for Osaka’s World Create Day was fixing a broken MacBook Air. The fan quit, and the repair involved soldering wires from the fan to pads on the motherboard.

La Orotava

The folks at the Orotava Hackerspace put on a great event for World Create Day. Wait, where’s Orotava? It’s a town on the island of Tenerife, in the Canary islands. No, the birds are named after the islands, and the islands are named after the dogs.

While they didn’t have hordes of hackers come to a Hackaday meetup on an island in the middle of the Atlantic (St. Helena meetup, anyone?), the Orotava hackerspace did have a few people show up to discuss Hackaday Prize projects. The interesting projects generated from this discussion included an automatic farming robot, mobility problems for mental patients, and a low-cost bandsaw.

Folding Mass Effect Pistol!

Video game props require a dedicated maker with a repertoire of skills to create. When those props are pulled from the Mass-Effect universe, a little more technological mastery is needed. Bringing those talents to bear,  [Optimistic Geometry] has built a motorized, folding M-3 Predator Pistol!

The gun was modeled in Fusion 360 and 3D printed on an Ultimaker 2 at the  MAKLab Glasgow. [Optimistic Geometry] felt constrained by the laws of our reality, so opted for the smaller firearm thinking it would be an appropriate entry-level challenge. I’m sure you can guess how that went.

There wound up being three main build phases as well as a spring-loaded version to testing purposes. Throughout, [Optimistic Geometry] struggled with getting the parts to latch fully open or closed, as well as working with the small form factor. However, overhauling the motor design — and including some limiters lest it deconstruct itself — a custom latching circuit, and — obviously — a few LEDs for effect, produced a magnificent prop.

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Don’t Be A Code Tyrant, Be A Mentor

Hardware hacking is a way of life here at Hackaday. We celebrate projects every day with hot glue, duct tape, upcycled parts, and everything in between. It’s open season to hack hardware. Out in the world, for some reason software doesn’t receive the same laissez-faire treatment. “Too many lines in that file” “bad habits” “bad variable names” the comments often rain down. Even the unsafest silliest of projects isn’t safe. Building a robot to shine lasers into a person’s eyes? Better make sure you have less than 500 lines of code per file!

Why is this? What makes readers and commenters hold software to a higher standard than the hardware it happens to be running on? The reasons are many and varied, and it’s a trend I’d like to see stopped.

Software engineering is a relatively young and fast evolving science. Every few months there is a new hot language on the block, with forums, user groups, and articles galore. Even the way software engineers work is constantly changing. Waterfall to agile, V-Model, Spiral model. Even software design methodologies change — from pseudo code to UML to test driven development, the list goes on and on.

Terms like “clean code” get thrown around. It’s not good enough to have software that works. Software must be well commented, maintainable, elegant, and of course, follow the best coding practices. Most of these are good ideas… in the work environment. Work is what a lot of this boils down to. Software engineers have to stay up to date with new trends to be employable.

There is a certain amount of “born again” mentality among professional software developers. Coders generally hate having change forced upon them. But when they find a tool or system they like, they embrace it both professionally, and in their personal projects. Then they’re out spreading the word of this new method or tool; on Reddit, in forums, to anyone who will listen. The classic example of this is, of course, editors like the vi vs emacs debate.

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JB Weld Fixes Cracked Cylinder Heads

There are persistent rumors that the main ingredient in JB Weld is magic. This two-part epoxy that you would normally find on a shelf next to your basic 5-minute epoxy, Titebond, various cyanoacrylates, and Gorilla glue is somehow different. Stories of ‘some guy’ in the Yukon using JB Weld on a cracked engine block abound. These stories are of course met with skepticism.

Now, finally, we have evidence you can use JB Weld to fix an engine. [Project Farm] over on YouTube gave it the ultimate test: he took the cylinder head off a lawnmower, took a grinder to the head, and patched the hole with JB Weld. The head had good compression, and the engine actually ran for 20 minutes before the test was concluded.

If this were a test of a field repair, it would be a test of an extremely crappy field repair. [Project Farm] made no attempt to ensure the piston didn’t make contact with the blob of JB Weld, and in fact, there was some slight knocking from the piston tapping against a blob of epoxy. Still, this repair worked.

While this serves as proof of the feasibility of repairing an engine block with JB Weld, there is one ultimate test of JB Weld epoxy: build an engine out of it. For years, I’ve been casting my leftover JB Weld into a small square plastic container. In a few more years, I’ll have a block of JB Weld ‘stock’, large enough to machine the parts for a small (.049 cc) glow engine, like what you would find in ye olde tymie model planes and cars. Will it work? I have no idea, but now I can’t wait to find out.

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Zen And The Art Of Arduino

A zen garden should be a source of relaxation and escape from the everyday. The whole point should be to escape from–among other things–your electronics. Unless you are [MakrToolbox]. Then you’ll make a beautiful zen garden end table that allows you to make patterns in the sand using a ball bearing and an Arduino. You can see a video below.

Technically, the device is almost an upside down 3D printer with no Z axis. The mechanism moves a magnet which controls the steel ball and draws patterns in the sand. However, the really impressive parts of this project are the woodworking for the end table and the impressive documentation, should you want to reproduce this project yourself.

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Digitize Your Room With LIDAR

What’s the best way to image a room? A picture? Hah — don’t be so old-fashioned! You want a LIDAR rig to scan the space and reconstruct it as a 3D point map in your computer.

Hot on the heels of [Saulius Lukse]’s scanning thermometer, he’s replaced the thermal camera on their pan/tilt setup with a time-of-flight (TOF) camera — a Garmin LIDAR — capable of 500 samples per second and end up scanning their room in a mere fifteen minutes. Position data is combined with the ranging information to produce a point cloud using Python. Open that file in a 3D manipulation program and you’ll be treated to a sight like this:

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Flamethrower skateboard

Light A Fire Under Your…Skateboard?

Kids, please don’t try this at home. Or at least make sure there’s nothing flammable around.

With that out of the way, we have to ask — who doesn’t love playing with fire? We’re betting that many of you also have enjoyed a little skateboarding at some point in your lives. [mikeasaurus] has married the two beloved activities and made a flame throwing skateboard! The parts count is fairly low, and it looks like everything can be purchased from Amazon if you can’t source all of the items locally.

[mikeasaurus] gives a few useful tips such as how he bent one of the two pipes on the fuel tank cap to prevent fuel from pouring out. Also, he used an adapter to bring down the diameter of the tubes from 1/4″ to 1/8″ which makes for a better performing fuel stream.

Instead of making this little foot cooker more complicated with additional electronics and wires to be operated by a hand-held remote control, [mikeasaurus] decided to build the controls directly into the skateboard with just a couple of foot-activated switches. This keeps his hands free to wave at all of the onlookers watching him speed by. Or better yet, to carry a fire extinguisher.

Admittedly, it appears from the video that the flame doesn’t really get ‘thrown’ too far, and [mikeasaurus] himself says:

“As long as you’re moving forward when the flames are activated, you’re good to go!”

Because of this, you probably don’t want to use your favorite board, as it’s going to be subject to direct flames.

You’ll see this when you watch the video after the break.

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