A Kyria split keyboard and wrist rests on a stand made of LEGO.

LEGO Keyboard Stand Fits Just Right

Split keyboards are great for many reasons, but mostly because you can place the halves as far apart as you want and really give your arms and shoulders the room they need. [Jason Cox] hit the nail on the head, though: add in a couple of palm rests, and you now have four things that will potentially shift and drift out of place on your desk or keyboard tray. It was such a problem that [Jason] hardly ever used his Kyria. That is, until he built a stand out of LEGO to hold everything.

[Jason] was using a pair of Manfrotto pocket tripods to tent the keyboard, and those held their position surprisingly well, even though he tweaked them here and there over time. Ultimately, [Jason] knew he wanted the answer to be something customizable. And what’s more customizable than LEGO?

About $60 worth of new white bricks and plates later, [Jason] got to work, spending an evening building the thing. He ended up using a few bricks to hold the keyboard in place on the plate, and it worked perfectly.

Of course, he didn’t get the whole contraption exactly how he wanted it the first time, but tweaking builds is half the fun, right? After a while, [Jason] figured out he could rebuild the part that connects the two keyboard halves to go around a plastic piece at the back of the keyboard tray, which holds the whole thing in place. The end result? Wonderful. The Kyria stays in place, and now [Jason] is using it way more than before.

You know LEGO is versatile, but did you know you can use it to build a hydroelectric dam?

Via reddit

LED Choker Is A Diamond In The Junk Pile

Isn’t it great when you find a use for something that didn’t work out for the project it was supposed to? That’s the story behind the LED strips in this lovely blinkenlights choker by [Ted].

The choker itself is a 15 mm wide leather strap with holes punched in it. According to [Ted], the hole punching sounds like the absolute worst and hardest part to do, because the spacing of the holes must be greater than that of the LEDs to account for flex in the strap. [Ted] tested several distances and found that there is little margin for error.

Controlling those blinkenlights is a Seeed Xiao S3, which fits nicely behind the neck in what looks like a heat shrink tube cocoon. [Ted] chose this because there was one lying around, and it happens to be a good fit with its LiPo charge controller.

The choker runs on four 300 mAh LiPo batteries, which makes for more bulk than [Ted] would like, but again, sometimes it’s about what you have lying around. Even so, the batteries last around two hours.

Sometimes it’s about more than just blinkenlights. Here’s an LED necklace that reports on local air quality.

Illustrated Kristina with an IBM Model M keyboard floating between her hands.

Keebin’ With Kristina: The One With The Pocket Cyberdeck

When you find something you love doing, you want to do it everywhere, all the time. Such is the case with [jefmer] and programming. The trouble is, there is not a single laptop or tablet out there that really deals well with direct sunlight. So, what’s a hacker to do during the day? Stay indoors and suffer?

Image by [jefmer] via Hackaday.IO
The answer is a project like Pocket Pad. This purpose-built PDA uses a Nice! Nano and a pair of two very low-power ST7302-driven monochrome displays. They have no backlight, but they update much faster than e-paper displays. According to [jefmer], the brighter the ambient light, the more readable the displays become. What more could you want? (Besides a backlight?)

The miniature PocketType 40% is a little small for touch typing, but facilitates thumbs well. [jefmer] added those nice vinyl transfer legends and sealed them with clear nail polish.

All of the software including the keyboard scanner is written in Espruino, which is an implementation of JavaScript that targets embedded devices. Since it’s an interpreted language, [jefmer] can both write and execute programs directly on the Pocket Pad, using the bottom screen for the REPL. I’d sure like to have one of these in my pocket!
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Custom Mouse-Making: Clay Is The Way

For something that many of us handle all day long, it sure would be nice if mice came in more sizes and shapes, wouldn’t it? Until that day, we’ll just have to find something passable or else design and build a custom-shaped mouse from scratch like [Ben Makes Everything] did.

First, [Ben] played around with some modelling clay until he had a shape he was happy with, then took a bunch of pictures of it mounted on a piece of wood for easy manipulation and used photogrammetry to scan it in for printing after cleaning it up in Blender. About six versions later, he had the final one and was ready to move on to electronics.

That’s right, this isn’t just mouse guts in an ergonomic package. Inside is Arduino Pro Micro and a PMW 3389 optical sensor on a breakout board. [Ben] was going to use flexible 3D printed panels as mouse buttons, but then had an epiphany — why not use keyboard switches and keycaps instead? He also figured he could have two buttons per finger if he wanted, so he went with Kailh reds for the fingers and and whites in the thumb.

Speaking of the thumb, there was no room for a mouse wheel in between those comparatively huge switches, so he moved it to the the side to be thumb-operated. [Ben] got everything working, and after all this, decided to make it wireless. So he switched to an Adafruit Feather S3 and designed his first PCB for both versions. Ultimately, he found that the wireless version is kind of unreliable, so he is sticking with the wired one for now.

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Your Cat Needs Its Own TV

Cats are wonderful creatures to have around, and they provide us with hours of entertainment. So why not do a little something to entertain them in return? That’s exactly what [Becky Stern] did by making a cat TV that shows YouTube videos of birds and other cat-approved content. Not all cats seem to care about TV, but [Becky]’s cat Benchley really gets into it.

As you may have guessed, this is a fairly simple build, consisting largely of a Raspberry Pi, a speaker, and a screen — a 5″ HDMI LCD display to be exact. Seems like a nice size for cats. After getting the cat-puter up and running, [Becky] set about designing a 3D-printed enclosure to turn it into a TV. The first draft looked great in marble-effect filament, but lacked breathing holes for the Pi, so the final version has a nice honeycomb pattern that is too small for curious cat paws to fit through.

What their paws can do is accidentally pause the video via the touch screen, so [Becky] swapped the USB cable for a charge-only to prevent this. Be sure to check out the build video after the break, because there is plenty of cat cuteness to be had. [Benchley] was so into it that he went looking around back for cats and squirrels inside the box.

Would you rather not encourage your cats to lie about the house watching TV all day? Make them play piano for their dinner.

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2024 Home Sweet Home Automation: Plantpal Is A Friend To You Both

One easy way to get started on the home automation front is with something that makes a house a home in the first place — lush, green plants. As nice as it is to have them around, it can be difficult to care (or remember to care) for them all the time.

Plantpal makes easy work of that, with an e-paper display that makes it plain as day how your plant is feeling. As you might expect, it features a soil moisture sensor, but what might be unexpected is that it’s capacitive instead of the usual resistive type. This way, no traces are exposed to the elements of plant life. It also has a BME688 sensor to monitor air quality and CO₂, so your plant has the chance to thrive.

Around back you’ll find an ESP32-C6, an AEM10941 for solar energy harvesting, and another set of solar panels. Be sure to check out the project’s GitHub if you want to learn more about this adorable and useful device.

Hackaday Podcast Episode 261: Rickroll Toothbrush, Keyboard Cat, Zombie Dialup

This week, Editor-in-Chief Elliot Williams and Kristina Panos met up in a new disposable location to give the lowdown on this week’s best hacks. First up in the news — the Home Sweet Home Automation contest is still going strong. You’ve still got plenty of time, so get on over to Hackaday.IO and start your entry today. In the news, the UK is asking how powerful an electric bike should be (more than 250 Watts, certainly), and legal pressure from Nintendo has shut down two emulators.

Then it’s on to What’s That Sound. Kristina failed again, although she was pretty confident about her answer. Can you get it? Can you figure it out? Can you guess what’s making that sound this week? If you can, and your number comes up, you get a special Hackaday Podcast t-shirt.

But then it’s on to the hacks, beginning with a Wi-Fi toothbrush hack from [Aaron Christophel]. This can only mean the beginning of some epic toothbrush firmware, right? From there, we marvel at moving cat food, the ultimate bulk material, and the idea of spoofing a whole cloud of drones. Finally, we examine one of Jenny’s Daily Drivers in the form of Damn Small Linux (the other DSL), and reminisce about dial-up (speaking of DSL).

Check out the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Download and savor at your leisure.

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