- MatterHackers Punch-Out: The Best 3D Print Ejector Ever (YouTube, via Make)
- The 11,000 marble marble machine
- Red Hot Nickel Ball (RHNB) vs Jawbreaker (YouTube)
- After Dark (Classic Mac Screensavers) in CSS
- 3D printed sink faucets by American Standard
- The Amazing Do-Nothing Machine at the Miniature Engineering Craftsmanship Museum (YouTube)
- Building enclosures from circuit boards @ Hackaday
- Elsa M. Garmire, laser art pioneer
- Resonant Frequency of Googly Eyes from Rob Cruickshank (Vimeo)
- Painting clean lines with painter’s tape @ Popular Mechanics
- svgerber: a browser based Gerber to SVG converter, for previewing circuit board designs
- The chalk that the mathematicians are hoarding
- Cat video: Kitty hitches a ride in the wing of an ultralight aircraft.
Super Awesome Sylvia has posted a video report from this year’s RoboGames. Highlights include a couple of combat matches, one of Sylvia’s LEGO competitions, WaterColorBot receiving a medal, and Sylvia completely geeking out after Grant Imahara interviewed her in the audience. (For extra fun, watch the raw footage of the interview from RoboGames.) Our STEAM shirt makes a cameo, too.
JK Brickworks made this amazing “pick and place” style Lego Mosaic Printer:
It is built entirely using LEGO parts. It first uses the EV3 colour sensor to scan the source image and save the data on the Mindstorms unit. It can then print multiple copies from the saved image data. The 1×1 plates used for ‘printing’ the mosaic are supplied using a gravity feed system and the printing head is simply a 1×1 round plate that can pick up and place the 1×1 plates.
More information about this project can be found at JK Brickworks.
They posted a picture of the finished painting, which looks awesome.
KnitYak scarves ship with the specific code and generating key used to make the pattern on your scarf. There is something powerful about knowing the mathematics and code behind the pattern you are wearing.
She’ll be getting an industrial knitting machine for her company KnitYak to automate the process of manufacturing these individualized creations.
I was invited to post over at Medium from my perspective as a woman maker and entrepreneur. I wrote a bit on Flourishing in the Maker Community.
As a woman, I am often called to tell what it it is like to be a woman in my field, or to provide advice on how to get young women interested in technology. I’d much rather share the amazing things people are doing with our products. I’d much rather help someone learning about electronics to get over a hurdle to the point they are successful with a project. And I’d much rather spend my time working on projects that in their own way, help young women and men to flourish and learn.
Politicians To Poop is a new extension for the Chrome web browser that replaces the names of presidential candidates (US, 2016) with the “pile-of-poo” emoji. Options allow you to “poopify” the names of Democrats, Republicans, or both.
Politicians To Poop is available now, for free, at the Chrome web store.
Possible reasons that you might want to use this extension include:
- You are from outside the US, and don’t need to hear these names every day.
- You are temporarily overloaded by the amount of poop that the candidates sling at one another.
- Because it is funny.
No judgement upon any of the named individuals, nor their platforms, parties, or beliefs is either implied or intended. This is intended to be an equal-opportunity text replacement tool, for the good of all humanity.
This project was inspired by Millennials to Snake People. Much more information including source code, the list of names, and additional attribution is available at our GitHub repository.
I’m excited to be included in an article on retro tech style in the New York Times today, titled Nintendo 64s and Vintage PlayStations as Home Décor.
Not surprisingly, these techie hobbyists share their passion in online communities. One of the more popular forums is a D.I.Y. tech blog run by Evil Mad Scientist Laboratories, a family company in Sunnyvale, Calif., that produces open-source hardware. The site features tutorials on making earrings out of linear regulator chips, wine charms from capacitors and a wooden footstool in the shape of a classic 555 integrated circuit chip from the ’70s.
Our friends stopped by with a simple apparatus to demonstrate the diamagnetic properties of bismuth metal. Diamagnetism is a extremely weak magnetic effect — generally orders of magnitude weaker than everyday permanent magnets, which exhibit ferromagnetism. However it is also an extremely interesting effect because diamagnetic materials are repelled by magnetic fields. This is different than the case with ferromagnets, where one pole of a magnet repels another — rather, the entire material is (weakly) repelled by any magnetic pole.
Now, how might one observe such a weak effect? One way is to build a magnetic levitation rig, but the field configurations there are a little less obvious. With a simple but sensitive balance, we can see the repulsion directly. The balance above has a long wooden beam, a central pivot on two blocks of plastic, and a couple of coins on the far end for counterbalance.
At the business end of the scale, there is a cylinder of bismuth metal about 1 cm in diameter, held in place by a rubber band. We also have a larger rectangular block, which is our test magnet, made of grade N50 NdFeB and painted black. And finally, the Lego Astronaut Twins are here helping out as a scale and position reference.
Moving the block magnet beneath the bismuth, we can see what happens in an animated GIF:
After the balance settles, the resting position of the end with the bismuth is considerably higher. With some calibration in terms of weights and/or positions, one could even measure the exerted force with some precision.
A slight improvement to this apparatus would be to reverse the roles of the bismuth and the block magnet. That is, to affix the magnet to the arm of the balance, and to slide the bismuth beneath it instead. You could then use a nearby block of aluminum to damp the motion of the beam through magnetic (eddy current) damping. Many commercial balance-beam type scales already use magnetic damping so that they settle down to their final values faster.