A Cool Mist that Dries Your Clothes

This one is both wild enough to be confused as a conspiracy theory and common sense enough to be the big solution staring us in the face which nobody realized. Until now. Oak Ridge National Laboratory and General Electric (GE), working on a grant from the US Department of Energy (DOE), have been playing around with new clothes dryer technology since 2014 and have come with something new and exciting. Clothes dryers that use ultrasonic traducers to remove moisture from garments instead of using heat.

If you’ve ever seen a cool mist humidifier you’ll know how this works. A piezo element generates ultrasonic waves that atomize water and humidify the air. This is exactly the same except the water is stored in clothing, rather than a reservoir. Once it’s atomized it can be removed with traditional air movement.

This is a totally obvious application of the simple and inexpensive technology — when the garment is laying flat on a bed of transducers. This can be implemented in a press drying system where a garment is laid flat on a bed or transducers and another bed hinges down from above. Poof, your shirt is dry in a few seconds.

But individual households don’t have these kinds of dryers. They have what are called drum dryers that spin the clothes. Reading closely, this piece of the puzzle is still to come:

They play [sic] to scale-up the technoloogy to press drying and eventually a clothes dryer drum in the next five months.

We look at this as having a similar technological hurdle as wireless electricity. There must be an inverse-square law on the effect of the ultrasonic waves to atomize water as the water moves further away from the transducers. It that’s the case, tranducers on the circumference of a drum would be inefficient at drying the clothing toward the center. This slide deck hints that that problem is being addressed. It talks about only running the transducers when the fabric is physically coupled with the elements. It’s an interesting application and we hope that it could work in conjunction with traditional drying methods to boost energy savings, even if this doesn’t pan out as a total replacement.

With a vast population, cost adds up fast. There are roughly 125 M households in the United States and the overwhelming majority of them use clothes dryers (while many other parts of the world have a higher percentage who hang-dry their clothing). The DOE estimates $9 billion a year is spent on drying clothes in the US. Reducing that number by even 1/10th of 1% will pay off more than tenfold the $880,000 research budget that went into this. Of course, you have to outfit those households with new equipment which will take at least 8-12 years through natural attrition, even if ultrasonics hit the market as soon as possible.

Continue reading “A Cool Mist that Dries Your Clothes”

Don’t Try This at Home is Cliché for a Reason

Oh, for cryin’ out loud. That’s the last straw. We’ve seen one dangerous YouTube video too many. Are we honestly cursed with a false feedback system that unequitably rewards dangerous behavior in online videos? Obviously the answer is ‘yes’. Now the real question becomes, can we do anything about it?

Professional Driver on a Closed Course

Marketing is all about putting something in front of a consumer and getting their brain to go “awesome!”. The fast, loud, shiny, burny, and sharp things are all on the table for that task. It’s the primal part of your brain that gives you jolt, as if your amygdala forgot how to run from sabertooths (saberteeth?) and learned how to like and subscribe.

Back in the day, people were hurt and even killed when replicating stunts they saw done on television. To protect from litigation, companies started adding disclaimers — Don’t Try this at Home or my favorite: Professional Driver on a Closed Course.

But the thing is, commercials are big business. If someone gets hurt, there’s money to be had by assigning blame in a court of law. When the ability to produce and distribute video content was democratized by the coming of the Internet we lost those warnings and the common sense that went with them.

Going way back to this remote-control-a-real-car hack in 2009 I haven’t been able to shake the lack of consideration for danger in a project like this. I included it in the title, which ends with “(dangerously)”. While I wasn’t taken to task in the comments for that title, I have been chided for advocating for things as controversial as helmets when strapping your body to a moving object. Do a Ctrl-F on “helmet” in this article to see what I mean.

The people pulling off these hacks were doing it because it felt awesome and they wanted to document how that felt. They weren’t stars, they were hackers and the world mostly ignored them except in places like Hackaday. We might debate the lack of safety measures but most assumed anyone with skills to do this would take a beat to consider the risks. This was probably a false assumption.

It’s All About the Subs

Things have gotten worse since then. I can’t blame all of this on YouTube, but I’m going to try. One day, YouTube changed everything. They put together a perfect mix of easy uploading, great discoverability, and (most importantly) advertising revenue sharing. For some people, this became a business and not just a way to connect with the rest of the hacker community.

This is the rise of the subscriber base. It’s a vicious cycle — you need more people to like and subscribe so that their influence will push your channel to more people to like and subscribe. The problem is, the fastest way to this is that tricky amygdala again. For some, this is being funny, but for others this is speed, fireballs, and loud bangs, with no regard for life, limb, or eyeball.

We’re Far From Blameless

I like fireballs and fast cars as much as the next person. And we’ve certainly run a lot of articles on the escalatingly dangerous hacks out there for all to see. For instance, we’ve covered several hacks from [kreosan], like microwaving things outside of a microwave and then building a microwave gun.

Pyro Build
Short sleeves and flamethrowers. What could go wrong?

But even the more mainstream content appears to be getting more and more dangerous. Our beloved [Colin Furze] is guilty of dangerous behavior. Not only did he burn himself testing a jet engine out without any safety gear, but turned the aftermath into another ad-supported video.

Which brings me to the straw that broke the camel’s back. Here’s a hack that’s based on the idea of hurting people. It’s what is (luckily) a crappy robot designed to recognize faces and shine lasers into any eyes it detects. Literally it’s conceived to shoot your eyes out. It’s using a red laser that likely won’t cause eye damage unless you intentionally stare into it without blinking, but that’s not discussed in the video, and someone who doesn’t know better replicating this with a different laser could easily cause irreparable damage to their sight.

Rocket Scientists Use Common Sense and So Should You

I was going to use the heading “This Isn’t Rocket Science”, but you don’t see rocket scientists testing new engine designs by lighting a fuse as they run away giggling in short sleeves and flip-flops. Those brilliantly intelligent people are tucked safely in a bunker at a safe distance with their hands hovering over the emergency kill switch as fire fighting equipment hangs out at arms reach. Rocket scientists know a lot about safety and so should you.

This is simple. We don’t have to invent anything to add safety to our hacks. Use common sense. Dress appropriately for your demo — as the situation dictates use reasonable fire-resistant clothing, helmet, etc. Wear protective glasses, laser spec’d goggles, and ear plugs; each whenever called for. Take fumes and particulates seriously and wear respiratory gear. Keep a fire extinguisher around. And if you’re making a video or posting images about it — which you should definitely do — snap a picture or give us a quick video cut to the safety precautions you’ve chosen.

I still want to see awesome projects on YouTube. But I also want to see the trend towards danger for clicks stopped. Let’s do dangerous stuff safely. And let’s be conspicuous about those safety measures. That combination is truly awesome.

Now get off my lawn, and wear your seat belt while doing so.

Up, Up, Up: $2k More Seed Funding for Projects that Matter

Getting a project off the ground often means an up-front investment in parts. Hackaday is upping our efforts to smooth out that obstacle for those who want to Build Something That Matters. Seed funding for the 2017 Hackaday Prize is simple, enter your design plans, share it far and wide so that a lot of people will show their admiration with a ‘like’ on the project page. You get a dollar for each like to help jump-start the build phase.

This year has started off like a rocket. Last week we passed the $4000 seed funding limit even though there’s still two weeks left in the Design Your Concept round. We’re raising the pot to a total of $6000. That means there’s more up for grabs. Enter your project now. If you’ve already done that, polish up your presentation and show it around to your friends and on social media. You’ll get a dollar for every like up to $200 max, or until we undoubtedly reach the new limit once again. Don’t delay, it’s time to Build Something that Matters!

Organizers of World Create Day are Getting Something Special

World Create Day is this Saturday, and events are being organized all over the world. Anyone can set one of these up, and it’s not too late for you to have one in your own town — just fill out this form to become a host.

We’re sending swag out for everyone that gets together and hacks on World Create Day, things like stickers and a few other goodies. This year we’ve decided on a special thank you to the local organizers. Check out the mockups for these T-shirts. Our Art Director, Joe Kim, has created something truly amazing with this year’s images. You can only get one if you are the meetup organizer and you post pictures and a bit of back story about your World Create Day experience on your event page.

If you’ve been on the fence about being a host, take the leap and give it a try! It’s great fun to get together with other Hackaday folks in real life, and you’ll get this super-rare Hackaday shirt out of it.

PassivDom: Mobile Homes for Millenials

In many parts of the world, living in a trailer has gained a social stigma. We’re talking about a rectangular building placed on three wheels and towed to your preferred plot of land. It’s going to take a lot to break that social stigma, but this is a pretty sweet attempt.

PassivDom is an off-grid home. It sidesteps the electrical grid as well as water and sewer service. It’s marketed as utilizing revolutionary breakthrough in wall insulation which they claim makes it very easy to heat and cool. In addition to this self-sustaining angle, it taps into the tiny home movement with a footprint of just 36 m2 (4 m by 9 m; about 118 390 ft2 or 13′ by 30′).

For this to make sense you really need to get the “Autonomous” model, the only one that is designed for “off-grid” living and comes with solar panels and battery storage plus water storage and purification. That’ll set you back 59,900 € (about $63,461 USD) but hey, it does come with “high quality minimalistic furniture” which the best way we can think of to serve Ikea nesting instinct without saying the brand name. Yep, this ticks all the “marketing to millennials” boxes. We’re kind of surprised it’s not doing crowdfunding.

So where’s the hack? Obviously this is a hard sell at 1,664 €/m($538 $163/ft2). A project of this size and scope is well within the purview of a single, motivated hacker, and arguably a weekend project for a well-skilled team from a hackerspace. Tiny Houses started as a build-it yourself so that’s already solved. We’ve seen what it takes for hackers to add solar to their RVs, and experiments in home-built power walls. Water storage and purification is already solved and quite affordable at the home store.

Has anyone built their own off-grid tiny house? If so, let us know what went into it. If not, what are you waiting for?

Ask Hackaday: How Do You Python?

Python is the Arduino of software projects. It has a critical mass of libraries for anything from facial recognition and neural networks to robotics and remote sensing. And just like Arduino, I have yet to find the killer IDE for Python. Perhaps I just haven’t tried the right one yet, but it could be that I’m just doing Python wrong.

For Years I’ve Been IDLE

IDLE with interactive shell that has highlighting and code completion

I’m a Linux-only type of a guy so using IDLE for Python is a natural fit. It’s in the repositories for super quick and easy install and there’s basically zero configuration to be done. Generally speaking my preferred development environment is text editor and command line compiler. IDLE is just one step above that. You get a separate window for the shell and each Python file you’re working on. Have IDLE run your code and it saves the file, then launches it in the shell window.

For me, there are two important features of IDLE’s shell. The first is that it keeps an interactive session open after you run your Python code. This means that any globals that your script uses are still available, and that you can experiment with your code by calling functions (and classes, etc) in real time. The second desirable feature is that while using this interactive shell, IDLE supports code completion and docstring support (it gives you hints for what parameters a function accepts/requires).

But simplicity has a tough time scaling. I’m working on larger and larger projects spread over many files and the individual nature of IDLE editor windows and lack of robust navigation has me looking to move forward.

The Contenders

I’ve tried perhaps a half-dozen different Python IDEs now, spending the most time on two of them: Geany and Atom. Both are easy to install on Linux and provide the more advanced features I want for larger projects: better navigation, cross-file code completion (and warnings), variable type and scope indication.

The look of Geany brings to mind an “IDE 1.0” layout style and theme. It’s the familiar three-pane layout that places symbols to the left, code to the right, and status along the bottom. When you run your program it launches in an interactive terminal, which I like, but you lose all IDE features at this point, which I despise. There is no code completion, and no syntax highlighting.

I have been using Atom much more than Geany and have grown to like it enough to stick with it for now. I’d call Atom the “IDE 2.0” layout. It launches with a dark theme and everything is a tab.

Atom has symbol view that isn’t shown all the time. CTRL-R brings it up and it uses a search style but you can also scroll through all symbols

Atom depends heavily on packages (plugins that anyone may write). The package management is good, and the packages I’ve tried have been superb. I’m using autocomplete-python and tabs-to-spaces, but again I come up short when it comes to running Python files. I’ve tried platformio-ide-terminal, script, and runner plugins.  The first brings up a terminal as a bottom pane but doesn’t automatically run the file in that terminal. Script also uses a bottom pane but I can’t get it to run interactively. I’m currently using runner which has an okay display but is not interactive. I’ve resorted to using a “fake” python file in my projects as a workaround for commands and tests I would normally run in the interactive shell.

Tell Us How You Python

It’s entirely possible I’ve just been using Python wrong all these years and that tinkering with your code in an interactive shell is a poor choose of development processes.

What do you prefer for your Python development? Does an interactive shell matter to you? Did you start with IDLE and move to a more mature IDE. Which IDE did you end up with and what kind of compromises did you make during that change. Let us know in the comments below.

World Create Day: Get Together and Hack on April 22nd

Venture away from your workbench and see what others have been building this year. It’s time for Hackaday World Create Day when hackers all over the world get together to work on projects.

On April 22nd, join the creative minds in your area for a few hours of build time. It’s an opportunity to inspire and be inspired by others. There’s no better way to make those leaps forward on a project than to share your work with others. This pollination of ideas is what sparks creativity, and it’s a great excuse to meet new people.

Find a meetup near you right now. Don’t see one in your area? Become a host, it’s easy and we’ll help!

What’s It Like at a World Create Day Meetup?

When the Hackaday community gets together it’s always a fun time. Each meetup on April 22nd will be unique. These are organized locally and given life by those who show up. Bring an open mind and something you’re excited about and you’ll be right at home.

We’re sending out stickers like this one, along with other swag, to meetups that sign up early. Do it now!

For instance, if I were Brian Benchoff I might bring along my 3D printed WiFi antenna and a few different WiFi devices to see if anyone wanted to do some distance measurements and signal strength characterization. I myself have been working on an art project that uses computer vision and replacement display for my exercise machine so I’ll bring one of those. After a few hours of hacking, it’s customary to go around the room and have people give a very brief explanation of their work.

World Create Day is the perfect place to put together you Hackaday Prize Team. As the ideas fly, keep in mind the power of one idea to change the world. Consider picking a challenge, brainstorming an idea, and entering it in the Hackaday Prize.

Pics or It Didn’t Happen

Don’t let the great ideas live for only one day. Make sure you tell the story of your World Create Day. Post your pictures and descriptions on social media with hashtag #WorldCreateDay during the event. Pictures, project links, and a brief summary should be added on your meetup’s Hackaday.io event page. We want to cover as many of these as possible on Hackaday, so don’t be bashful about telling everyone what people at your meetup were working on — finished project or pencil drawing, we want to hear it!