Author: Kristina Panos

1857 Articles

Why Make Coffee When You’re Tired? Let A Robot Do It For You

July 25, 2021 by 9 Comments

Like us, [Alberto] doesn’t compromise when it comes to a good cup of coffee. We figure that if he went to an office in the Before Times, he was the type of coworker to bring in their own coffee equipment so as not to suffer the office brew. Or perhaps he volunteered to order the office supplies and therefore got to decide for everyone else. Yep, that’s definitely one way to do it.

But like many of us, he is now operating out of a home office. Even so, he’s got better things to do than stand around pouring the perfect cup of coffee every morning. See, that’s where we differ, [Alberto]. But we do love Cafeino, your automated pour-over machine. It’s so sleek and lovely, and we’re sure it does a much better job than we do by hand — although we enjoy doing the pouring ourselves.

Cafeino is designed to mimic the movements of a trained barista’s hand, because evidently you’re supposed to pour the water in slow, deliberate swirls to evenly cover the grounds. (Our kettle has a chunky spout, so we just sort of wing it.) Cafeino does this by pumping water from an electric kettle and pouring a thin stream of it in circles with the help of two servos.

The three buttons each represent a different recipe setting, which specifies the amount of water, the hand pouring pattern, and the resting times between blooming the grounds and actually pouring the bulk of the water. These recipes are set using the accompanying web app via an ESP32, although the main brain barista is an Arduino Nano. Grab a cup and check out the demo after the break.

Got an old but modern coffee robot lying around? You could turn it into a planter with automated watering.

Continue reading “Why Make Coffee When You’re Tired? Let A Robot Do It For You” →

Walk The First 3D-Printed Bridge And Be Counted

July 24, 2021 by 22 Comments

Way back in 2018, we brought you news of a 3D-printed stainless steel pedestrian bridge being planned to span a Dutch canal in Amsterdam. Now it’s finally in place and open to the public — the Queen made it official and everything. MX3D printed it on their M1 Metal additive manufacturing machine that is essentially a group of robots welding layers of metal together using traditional welding wire and gas.

The partnership of companies involved originally planned to build this beautiful bridge in situ, but safety concerns and other issues prevented that and it was built in a factory instead. The bridge has been printed and ready since 2018, but a string of delays got in the way, including the fact that the canal’s walls had to be refurbished to accommodate it. Since it couldn’t be made on site, the bridge was taken there by boat and placed with a crane. After all this, the bridge is only permitted to be there for two years. Hopefully, they have the option to renew.

This feat of engineering spans 40 feet (12.2 meters) long and sits 20 feet (6.3 meters) wide. It’s equipped with sensors that measure structural stuff like strain, displacement, load, and rotation, and also has environmental sensors for air quality and temperature. All of this data is sent to the bridge’s digital twin, which is an exact replica in the form of a computer model. One of the goals is to teach the bridge how to count people. Be sure to check out our previous coverage for a couple of short videos about the bridge.

No Mask Required: Bring-A-Hack Is Back August 5th

July 22, 2021 by 9 Comments

Yes, we’re still in a pandemic and yes, these types of events are still happening over videoconference and not in meat space. But you know what? That means that so many more people have the opportunity to show up and show off their hacks! As long as 1 PM PDT is within your personal uptime, that is. Maybe you can make an exception if not?

Here is your link: the summer edition of Bring a Hack with Tindie and Hackaday will take place on Thursday, August 5th at 1:00 PM Pacific Daylight time (that’s 4pm EDT | 9pm BST/CET). Choose your gnarliest hack of late and go register for the event, which will be held on the Crowdcast video chat platform this time around.

The remote Bring-A-Hack held way back in April was packed with awesome people. Now is your chance to join in! You all have awesome projects from the last few months (we’ve seen a lot of them on these very pages), so come show them off to the hacker elite from around the globe. You know the deal: it really doesn’t matter what level your project is on, so don’t worry about that. As long as you’re passionate about it, we’d love to see it and hear all about the problems you had to overcome and yes, even the mistakes you made. You never know what knowledge you might have that can push someone else’s project over the finish line.

Shine up your hacks, and mark those calendars; here’s a timezone converter if you need it. Reserve your spot now. Seriously, don’t fool yourself into thinking your build isn’t impressive enough — we want to see it. My hack might not even involve a circuit, and that’s enough to pique your interest, right? See you there!

Avoiding Repetitive Stress Injury: Invest In Yourself Now, Or Pay Later

July 22, 2021 by 49 Comments

There I was, thirty years after I first sat down at an Apple IIe , and I suddenly found myself wondering if I would ever use a computer again without pain. How could I work if I couldn’t use a computer anymore? I had to seriously ask myself this question. It took a bit of a winding road to figure out what was going on and two EMGs to confirm it, but after all these years, it was clear to the medical community that I had developed a repetitive stress injury (RSI) called cubital tunnel syndrome in my left arm.

Yeah, it’s about like that. Image via Kinesis

Cubital tunnel syndrome is like carpal tunnel, but in your elbow instead of your wrist. What a misnomer! Sometimes my pain went all the way from my armpit to my fingertips and made me want to gnaw my own arm off. I don’t think you can really understand neuropathy unless you’ve felt this weird, annoying type of pain firsthand. I hope you never do.

Can you stop and seriously imagine not being able to use a computer for the rest of your life? Or at least feeling that way because doing so causes incredibly annoying pain? I feel like we’re all vaguely aware of the standard list of anti-RSI precautions, but let’s review:

  • maintain good posture — sit with feet flat on the floor, wrists straight, elbows at 90°
  • put the screen an arm’s length away at eye level
  • take frequent short breaks

Yes, those are all fine and good. But there are other things you can do to avoid computer-related RSIs, like using ergonomic inputs, and building a custom setup that fits you exactly. This isn’t a study kiosk at the university library we’re talking about — this is your battlestation! The problem is that many people are stubborn, and won’t go out of their way to do anything to proactively prevent these injuries. But you don’t have to cross a bridge when you come to it if you have a map that shows you a way around the body of water.

Continue reading “Avoiding Repetitive Stress Injury: Invest In Yourself Now, Or Pay Later” →

One Giant Button To Mute Them All

July 20, 2021 by 3 Comments

The second round of this year’s Hackaday Prize is coming to a close, and we asked you to come up with ways of refreshing work-from-home life. Well here’s one we probably all could use — a large emergency mute button that can also turn off video with an extra click. You know, in case your kid or your roommate decides to walk around in their birthday suit.

[Colin Russell-Conway]’s software-agnostic mute button uses a Seeeduino Xiao and rotary encoder, plus three momentaries that give it a second function as a media controller. Two chunks of LED strip go blinky blinky when the mute is on, and are otherwise solidly lit and color-coded by videoconference type — blue for Zoom and Starleaf, green for Webex, and purple for Teams.

The companion app that [Colin] created is using the Windows Management Instrumentation (WMI) to check which program is control of the microphone. Whenever the mute button is pressed, the app makes note of the current program in focus, switches to the active videoconference, mutes it, and then switches back to reddit or twitch or whatever you had in focus when the kid started screaming for you from the bathroom. Check out the demo after the break.

Some of us like to celebrate a little when videoconferences are over. For those people, there is the pull-chain exit.

Continue reading “One Giant Button To Mute Them All” →

Smart Mirror Talks To 3D Printers

July 19, 2021 by 2 Comments

As time goes by, it’s only getting easier to make a magic mirror. You know, a mirror connected to the internet that shows information like news, weather, or whatever you want, right there on top of your stunning visage. In [Forsyth Creations]’ case, that data includes 3D printer activity on the network — something that’s way more relevant to daily life than say, headlines about Kim Jong Un’s weight loss progress. The build video is embedded below.

Thanks to projects like [MichMich]’s MagicMirror, everything is done with modules, including really useful things such as OctoMirror that let you keep an eye on your 3D printer(s) using OctoPrint.

The electronics are pretty simple here — [Forsyth Creations] used the guts of an old monitor for the display and a Raspberry Pi to serve up the modules as a web page. The only tricky part is power, because the LCD is going to need so much more voltage than the Pi and the absolutely necessary LEDs around the edge, but a couple of buck converters do the trick.

After stripping the monitor of all of its unnecessary plastic, [Forsyth Creations] cut rear and front frames to support the electronics. That isn’t a piece of mirror glass, it’s actually one-way acrylic which is lighter and somewhat cheaper. [Forsyth Creations] designed and printed some corner support brackets that double as leveling screw holders to get the acrylic panel dialed in just right, and you can get these for yourself from GitHub. We think this would be a good early woodworking project or something for a long weekend. [Forsyth Creations] built this in three days on an apartment balcony using a minimum of tools.

We especially admire that once it was done, he hung it up with a French cleat. Those are so useful.

Continue reading “Smart Mirror Talks To 3D Printers” →

Reinvented Retro Contest Winners Announced

July 17, 2021 by 7 Comments

Good news, everyone! The results of the Reinvented Retro contest are in, and the creators of these three groovy projects have each won a $200 online shopping spree to Digi-Key. We asked you to gaze deeply into your stuff piles and come up with a way to modernize a cool, old piece of hardware, and we left it up to you to decide how cool and how old.

No matter your personal vintage, you have probably used or even built an educational computer like [Michael Wessel]’s next-generation Microtronic. This is a re-creation of an early 1980s West German 4-bit microprocessor trainer called the Busch 2090 Microtronic Computer System. You may have never heard of it, but [Michael] swears it’s one of the best ever made. Years ago, [Michael] made a talking Arduino-based Microtronic emulator and has grown the concept into a prize-winning system that uses an ATMega2560 Pro Mini and a Nokia 5110 display. As a bonus, it doubles as a cassette interface emulator that plugs into the 2090’s expansion port. Take some time to dive into the YouTube videos or go straight for the gerbers and make your own.

Retrocomputing fans will love EBTKS, a project that seeks to circumvent the disintegrating tape drives in HP85A and other early 1980s HP computers by emulating them and delivering 20,000 virtual tapes via SD card. The project began as a solid state replacement using a Teensy and an ESP32, but [Philip] and the team realized they could do a whole lot more than that. The full list of features includes 70 new keywords and both disk and tape drive emulation. Everything is explained in detail on the project’s main documentation site, where you’ll also find a handy user guide.

If you have a soft spot for old Soviet gear, check out [ptrav]’s MK-52 Resurrection. [ptrav] took an early 90s-vintage calculator with a busted vacuum fluorescent display and breathed new life into it with an ESP32 and a 320×240 TFT screen. The point isn’t to merely resurrect the MK-52, but rather to create a phoenix of programmable Soviet calculating power that rises from the ashes and realizes its hardware unleashed potential. As part of the software development path, [ptrav] also built a fully-functional simulator in C# which you can check out on GitHub.

A Most Honorable Mention

It’s always so difficult to pick winners from among all the amazing projects we see. For this contest, we’ve chosen [Michael Gardi]’s WDC-1 — aka the Paperclip Computer — for an honorable mention. And that means more than just a published pat on the back — [Michael] has won a $25 gift card for Tindie. Way to go, [Michael]!

This WDC-1 is a bit of an inverse take on the reinvented retro concept. Instead of new tech in an old box, [Michael] employed modern PCB fabrication and 3D printing to house the upgraded homebrew guts of this 50+ year-old computer design.

Congratulations to all the winners, and a big thank you to all 138 entrants for your faux nostalgia-inspiring builds. Take some time this weekend to check them out, and get your alternate reality on.