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Recreating A Braun Classic With 3D Printing

March 17, 2025 by 15 Comments

Braun was once a mighty pillar of industrial design; a true titan of the mid-century era. Many of the company’s finest works have been forgotten outside of coffee table books and vintage shops. [Distracted by Design] wanted to bring one of the classics back to life—the Braun HL70 desk fan.

The original was quite a neat little device. It made the most of simple round shapes and was able to direct a small but refreshing stream of air across one’s desk on a warm day. In reality, it was probably bought as much for its sleek aesthetics as for its actual cooling ability.

Obviously, you can’t just buy one anymore, so [Distracted by Design] turned to 3D printing to make their own. The core of the build was a mains-powered motor yanked out of a relatively conventional desk fan. However, it was assembled into a far more attractive enclosure that was inspired by the Braun HL70, rather than being a direct copy. We get a look at both the design process and the final assembly, and the results are quite nice. It feels like a 2025 take on the original in a very positive sense.

Files are available on Printables for the curious. It’s not the first time we’ve contemplated fancy fans and their designs. Video after the break.

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A dark walnut table sits in the sun in what appears to be a field. Voids in the natural wood slab have been filled with shiny bronze, and a bundle of copper wire sits upon the edge of the table in a jaunty artistic fashion.

A Different Take On The River Table Does It In Bronze

February 28, 2025 by 6 Comments

River tables are something we’ve heard decried as a passé, but we’re still seeing some interesting variations on the technique. Take this example done with bronze instead of epoxy.

Starting with two beautiful slabs of walnut, [Burls Art] decided that instead of cutting them up to make guitars he would turn his attention to a river table to keep them more intact. Given the price of copper and difficulty in casting it, he decided to trim the live edges to make a more narrow “river” to work with for the project.

Since molten copper is quite toasty and wood likes to catch on fire, he wisely did a rough finish of the table before making silicone plugs of the voids instead of pouring metal directly. The silicone plugs were then used to make sand casting molds, and a series of casting trials moving from copper to bronze finally yielded usable pieces for the table. In case that all seems too simple, there were then several days of milling and sanding to get the bronze and walnut level and smooth with each other. The amount of attention to detail and plain old elbow grease in this project is impressive.

We’ve seen some other interesting mix-ups of the live edge and epoxy formula like a seascape night light or this river table with embedded neon. And if you’re looking to get into casting, why not start small in the microwave?

Continue reading “A Different Take On The River Table Does It In Bronze” →

An overhead shot of a parking lot. A road with cars parked along it is on the right hand side of the image. The top center shows a drilling rig on tracks drilling at a slight angle into the ground. Many different semi trailers dot the parking along with several different pallets of construction supplies. An excavator and skylift/forklift are also at work in the lot.

District Heat Pump Systems Save Money And Gas Utilities

February 26, 2025 by 50 Comments

Ground-source heat pump systems are one of the most efficient ways to do climate control, but digging the wells can be prohibitively expensive for the individual citizen. What if you could do it at a larger scale?

Starting with a pilot to serve 37 commercial and residential buildings in Framingham, MA, Eversource is using its experience with natural gas drilling and pipe to serve up a lower carbon way to heat and cool this neighborhood. While district heating via geothermal has precedents elsewhere in the country, Boise is a notable example, it has remained a somewhat niche technology. Once networked, excess heat from one location can be used elsewhere in the system, like data centers or industrial facilities being used to heat homes in the winter.

As gas utilities look to transition away from fossil fuels, their existing knowledge base is a perfect fit for geothermal, but there are some regulatory hurdles. Six states have passed laws allowing natural gas utilities to expand beyond just gas, and bills have been filed in six more. This will likely accelerate with the formation of the Utility Networked Geothermal Collaborative which includes many utilities including giants like Dominion Energy who are looking to expand their energy portfolios.

If you want to dig more into district heating systems or geothermal energy, we’ve covered cogeneration from power plants to serve up the heat instead, doing it with wind, or even using old coal mines for geothermal heat.

Unhacked Mattress Phones Home

February 24, 2025 by 30 Comments

[Dylan] has a fancy bed that can be set to any temperature. Apparently this set him back about $2,000, it only works if it has Internet, and the bed wants $19 a month for anything beyond basic features. Unsurprisingly, [Dylan] decided to try to hack the mattress firmware and share what he learned with us.

Oddly enough, it was easy to just ask the update URL for the firmware and download it. Inside, it turned out there was a mechanism for “eng@eightsleep.com” to remotely SSH into any bed and — well — do just about anything. You may wonder why anyone wants to gain control of your bed. But if you are on the network, this could be a perfect place to launch an attack on the network and beyond.

Of course, they can also figure out when you sleep, if you sleep alone or not, and, of course, when no one is in the bed. But if those things bother you, maybe don’t get an Internet-connected bed.

Oddly enough, the last time we saw a bed hack, it was from [Dillan], not [Dylan]. Just because you don’t want Big Sleep to know when you are in bed doesn’t mean it isn’t useful for your private purposes.

Multitasker Or Many Monotaskers?

February 22, 2025 by 21 Comments

In Al Williams’s marvelous rant he points out a number of the problems with speaking to computers. Obvious problems with voice control include things like multiple people talking over each other, discerning commands from background conversations, and so on. Somehow, unlike on the bridge in Star Trek, where the computer seems to understand everyone just fine, Al sometimes can’t even get the darn thing to play his going-to-sleep playlist, which should be well within the device’s capabilities.

In the comments, [rclark] suggests making a single button that plays his playlist, no voice interaction required, and we have to admit that it’s a great solution to this one particular problem. Heck, the “bedtime button” would make fun project in and of itself, and it’s such a limited scope that it could probably only be an weekend’s work for anyone who has touched the internals of their home automation system, like Al certainly has. We love the simplicity of the idea.

But it ignores the biggest potential benefit of a voice control system: that it’s a one-size-fits-all solution for everything. Imagine how many other use cases Al would need to make a single button device for, and how many coin cell batteries he’d be signing himself up to change out over the course of the year. The trade-off is that the general purpose solution tends not to be as robust as a single-tasker like the button, but also that it can potentially simplify the overall system.

I suffer this in my own home. It’s much more a loosely-coupled web of individual hacks than an overall system, and that has pros and cons. Each individual part is easier to maintain and hack on, but the overall system is less coordinated than it could be. If we change the WiFi password on the home automation router, for instance, I’m going to have to individually log into about eight ESP8266s and change their credentials. Yuck!

It’s probably a matter of preference, but I’ll still take the loose, MQTT-based system that I’ve got now over an all-in-one. Like [rclark], I value individual device simplicity and reliability above the overall system’s simplicity, but because our stereo isn’t even hooked up to the network, I can’t play myself to sleep like Al can. Or at least like he can when the voice recognition is working.

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Automatic Pill Dispenser Is Cheap And Convenient

February 12, 2025 by 20 Comments

If you’re taking any medication, you probably need to take it in a certain dose on a certain schedule. It can quickly become difficult to keep track of when you’re taking multiple medications. To that end, [Mellow_Labs] built an automated pill dispenser to deliver the right pills on time, every time.

The pill dispenser is constructed out of 3D printed components. As shown, it has two main bins for handling two types of pills, controlled with N20 gear motors. The bins spin until a pill drops through a slot into the bottom of the unit, with the drop detected by a piezo sensor. It uses a Beetle ESP32 as the brains of the operation, which is hooked up with a DS1307 real-time clock to ensure it’s dosing out pills at the right time. It’s also wired up with a DRV8833 motor driver to allow it to run the gear motors. The DRV8833 can run up to four motors in unidirectional operation, so you can easily expand the pill dispenser up to four bins if so desired.

We particularly like how the pill dispenser is actually controlled — [Mellow_Labs] used the ESP32 to host a simple web interface which is used for setting the schedule on which each type of pill should be dispensed.

We’ve featured some other pill dispenser builds before, too.

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Quix Furniture For Modular Furniture Fun

February 7, 2025 by 19 Comments

If you’re someone who moves a lot, or just likes to change your decor, the limitations of conventional furniture can be a bit of a pain. Why not build your furniture modularly, so it can change with you?

QUIX is a modular building system designed for furnishings developed by [Robert Kern]. Giving people the ability to “build any kind of furniture in minutes with no tools,” it seems like a good gateway for people who love building with LEGO but find the pegs a little uncomfortable and expensive for full-sized chairs and couches. Anything that makes making more accessible is an exciting development in our book.

Featuring a repeating series of interlocking hooks, the panels can be produced via a number of techniques like CNC, laser cutter, or even smaller 3D printed models. Dowels and elastic bands serve as locks to prevent the furniture from tilting and since you have such a wide variety of panel materials to choose from, the color combinations can range from classic plywood to something more like a Mondrian.

If you’re looking for more modular inspiration for your house, how about gridbeam or Open Structures? If you’re wanting your furniture more musically-inclined, try Doodlestation instead.

Continue reading “Quix Furniture For Modular Furniture Fun” →