Converted Car Lets Toddlers Tool Around

February 10, 2020 by Kristina Panos 9 Comments

A few years ago, a professor at the University of Delaware started a project called Go Baby Go. It’s designed to bring fun and affordable mobility to small children with disabilities. The idea is to modify Power Wheels cars to make them easier for disabled kids to operate, and to teach as many people as possible how to do it in the process. The [South Eugene Robotics Team] is taking this a step further by replacing the steering wheel with a joystick that controls two motors with an Arduino Nano.

In the first instance you replace the foot pedal with a push button. The plans also call for a PVC frame, a high-backed seat, and a seat belt to make it safer. The end result is a fun ride the kid can control themselves that functions a lot like a power wheelchair, but is much more affordable. It has the added bonus of being a fun conversation piece for the other kids instead of a weird scary thing.

They also replace the front wheels with 5″ casters, because being able to spin around in circles is awesome. Their project shows how to do the entire conversion in great detail, starting with a standard ride-on car that comes with some assembly required. Motor past the break to check out a short demo with an extremely happy child tooling around in a fire truck.

If these kids get too wild, they’re gonna need traction control for these things.

Continue reading “Converted Car Lets Toddlers Tool Around” →

Mitch Altman Asks How You’re Using Your Life

February 7, 2020 by Mike Szczys 57 Comments

This talk will probably make you a bit angry. You might be upset with some of Mitch Altman’s views or his hyperbole in describing them. Or you might be upset because you totally agree with his views and feel the same disappointment he does with many (ab)uses of technology. Either way, the point of his talk, which was given at the 2019 Hackaday Superconference, is that we all should think deeply about what we choose to do with our time and our talents. Consider yourself challenged.

The video below is packed full of colorful ideas, along with some colorful language. Let’s take a look.

Continue reading “Mitch Altman Asks How You’re Using Your Life” →

See If Today’s Air Quality Will Conch You Out

January 20, 2020 by Kristina Panos 16 Comments

Air quality is one of those problems that is rather invisible and hard to grasp until it gets bad enough to be undeniable. By then, it may be too late to do much about it. But if more people were interested in the problem enough to monitor the air around them, there would be more innovators bringing more ideas to the table. And more attention to a problem usually means more accountability and eventual action.

This solar-powered particulate analyzer made by [rabbitcreek] is a friendly way to take the problem out of the stratosphere of ‘someday’ and bring it down to the average person’s backyard. Its modular nature makes it fairly simple to build, and the conch shell enclosure gives it a natural look. That shell also cleverly hides the electronics, while at the same time allowing air and particulates to reach the sensor. If you don’t like the shell enclosure, we think the right type of bird feeder could protect the electronics while allowing airflow.

[rabbitcreek] attached a sizeable solar panel to the shell on a GoPro mount so it can be adjusted to face the sun. The panel charges a Li-Po battery that gets boosted to 5V. Every two hours, a low-power breakout circuit wakes up the Feather ESP32 and takes a reading from the particulate sensor. [rabbitcreek] can easily see the data on his phone thanks to the Blynk app he created.

Why limit this to your yard? Bare ESP32s are cheap enough that it’s feasible to build a whole network of air quality sensors.

Printed Separator Separates Printed Pages

January 11, 2020 by Kristina Panos 17 Comments

We all know people trapped in aging bodies who can’t do all the things they used to do. It’s easy to accept that you may never move small furniture around by yourself again, but losing the ability to do something as simple as separating the pages of your newspaper to keep reading it is an end to enjoyment.

When [Randomcitizen4] visited his grandma over the holidays, she mentioned having trouble with this, among other things. He fired up his printer and got to work designing a device to help her get back to the funny pages. This simple gripper mechanism uses rubber bands for tension and flexible filament to get a firm grip on the paper. The jaws default to the open position so they’re ready to grab some newsprint, and a light squeeze of the handles slides the top page back from the stack, creating a gap for Grandma’s fingers. You can see a demo ~~on page 32~~ after the break.

Although the device does work on some books and magazines, he’d like to improve the design of the grips to make the device more universally useful. [Randomcitizen4] says he tried a few things already, but we wonder if a more complex surface pattern might do the trick — maybe less like fins and more like a tire tread pattern. All the STLs are available if you want to give it a go.

If Grandma’s newspaper ever goes out of print, she should still be able to read it on a tablet or an e-reader. Then maybe [Randomcitizen4] can build some kind of remote-controlled page turner for her.

Continue reading “Printed Separator Separates Printed Pages” →

Organic Audio: Putting Carrots As Audio Couplers To The Test

January 6, 2020 by Jenny List 34 Comments

[Boltz999]'s carrot interconnect. — [Boltz999]’s carrot interconnect.

If there’s one thing that gives us joy here at Hackaday it’s a story of audio silliness. There is a rich vein of dubious products aimed at audiophiles which just beg to be made fun of, and once in a while we oblige. But sometimes an odd piece of audio equipment emerges with another purpose. Take [Boltz999]’s interconnects for example, which were born of necessity when there were no female-to-female phono adapters to connect a set of cables. Taking a baby carrot and simply plugging the phonos into its flesh delivered an audio connectivity solution that worked.

Does this mean that our gold-nanoparticle-plated oxygen-free directional audio cables are junk, and we should be heading for the supermarket to pick up a bag of root vegetables instead? I set out to test this new material in the secret Hackaday audio lab, located on an anonymous 1970s industrial estate in Milton Keynes, UK.

Continue reading “Organic Audio: Putting Carrots As Audio Couplers To The Test” →

You Could Be A Manufacturing Engineer If You Could Only Find The Time

January 3, 2020 by Mike Szczys 9 Comments

Let’s be honest, Ruth Grace Wong can’t teach you how to be a manufacturing engineer in the span of a twenty minute talk. But no-one can. This is about picking up the skills for a new career without following the traditional education path, and that takes some serious time. But Grace pulled it off, and her talk at the 2019 Hackaday Superconference shares what she learned about reinventing your career path without completely disrupting your life to do so.

Ruth got on this crazy ride when she realized that being a maker made her happy and she wanted to do a lot more of it. See wanted to be “making stuff at scale” which is the definition of manufacturing. She took the hacker approach, by leveraging her personal projects to pull back the veil of the manufacturing world. She did a few crowd funding campaigns that exposed her to the difficulties of producing more than one of something. And along the way used revenue from those projects to get training and to seek mentorships.

Continue reading “You Could Be A Manufacturing Engineer If You Could Only Find The Time” →

DIY Trommel Sifts Compost In Style

January 2, 2020 by Kristina Panos 22 Comments

Composting is a great idea that helps you and the planet at the same time. But all that stuff is going to break down at different rates, and depending on what you put in there and how soon you want to use the compost, you’ll probably have to sift out some unwanted stuff first.

[Minnear Knives] had a bunch of apricot stones in his compost pile, and it was the pits. He did some research and decided to build his own rotary trommel to tumble out the trash. As you will see in the video after the break, it works really well. All he has to do is turn on the motor and shovel raw compost or dirt into one end. Bad stuff tumbles out the other end into a wheelbarrow, while the good stuff is sifted down into a pile under the cylinder. Just look at that rich, fluffy compost.

The best part is that he was able to make it mostly from stuff he had lying around, though he did trade some beer for the v-belt pulley. The cylinder is essentially made from mesh that’s zip-tied to bicycle rims. A 1/4 horsepower motor mounted up top uses that v-belt pulley to spin the cylinder’s rims against casters that are mounted to the frame. Thanks to the pair of bike wheels on the back, he can cart it around the ranch unassisted.

Composting doesn’t have to be any more difficult than a pile in the backyard. But if you don’t have a backyard, why not build a rotating bin that you can monitor from your phone?

Continue reading “DIY Trommel Sifts Compost In Style” →