An oscilloscope with its probes stored in drawers below it

Clever Scope Probe Drawers Keep Your Workbench Tidy

May 1, 2022 by Robin Kearey 20 Comments

Probes are an essential component of a good oscilloscope system, but they have the nasty habit of cluttering up your workbench. If you have a four-channel scope, it’s not just several meters of cable that get in the way everywhere, but also four sets of all those little clips, springs, cable markers, and adjustment screwdrivers that need to be stored safely.

[Matt Mets] came up with a clever solution to this problem: a 3D printed cable organizer that neatly fits below your scope. It has four drawers, each of which has enough space to store a complete probe and a little compartment for all its accessories. A cable cutout at the front allows you to keep the probes plugged in even when they’re not in use.

It’s a beautifully simple solution to a common problem, and with the STL files available on Printables anyone with a cluttered workbench can build one for themselves. If, however, you’d like to keep those probes even closer at hand, have a look at these probe caddies. Continue reading “Clever Scope Probe Drawers Keep Your Workbench Tidy” →

Gridfinity: 3D Printed Super Quick Tool Storage And Retrieval

April 18, 2022 by Dave Rowntree 32 Comments

Our favourite cyborg [Zack Freedman] has been stumbling over a common problem many of us will be all too familiar with — that of tool storage and the optimal retrieval thereof. His solution is the Gridfinity: A modular workshop organisation system.

Never chase your pen around on the desk again

In [Zack]’s words, the perfect workshop has tools and materials arranged in the following way: (a) every item has a dedicated home within reach of where you’ll use it. (b) items are exposed and in position for instant grabification. (c) the storage system shields you from accidents like spills and injuries. (d) it is effortless to setup and easy to put back and rearrange. An instant-access storage solution such as the Gridfinity is designed not to help you store more stuff, but finish more projects. The idea is very simple — display your stuff so that you can quickly find what you need and get back to the project as quickly as possible. We think these aims are pretty spot on!

From an implementation perspective, the system consists of a 3D printed base plate with a grid structure. It is angled internally so storage bins drop in, but are not easy to knock out. Storage units drop into the grid in various sizes and orientations, such that everything is contained within the grid’s outer boundary, so the whole assembly will fit inside a drawer with ease. Small part storage bins have a curved inner surface enabling one to easily scoop out a part when required. A partial lid on the top allows them to be stacked vertically if required.

Super-quick access to fully sorted stock – no more searching

Whilst the system is work in progress, there are still about a hundred different storage units, for anything from 3D printer nozzles to racks for tweezers. Implemented as parameterised models in Fusion360, it is easy to tweak existing models for your stuff, or create totally new ones, from the supplied templates.

No discussion of tool organisation would be complete without first considering the king of tool organisation [Adam Savage], the principle of first order retrieval is a strong one. For a more in-your-face solution, you could go down the pegboard-on-wheels route, or perhaps if you’re less mobile and in a tight squeeze, then get comfortable with the French cleat and build something full custom right into the walls. Whatever solution you come up with, do share it with us!

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A V2 Rocket Inspired Steam Turbine Skateboard Is Just Around The Corner

April 12, 2022 by Dave Rowntree 19 Comments

[Integza] never fails to amuse with his numerous (and sometimes really sketchy) attempts to create usable thrust, by pretty much all means possible and the latest video (embedded below) attempting to run a reaction turbine from decomposing hydrogen peroxide, doesn’t fail to disappoint. The inspiration came from the WWII V2 rocket, which used Sodium Permanganate to breakdown Hydrogen Peroxide. This produced high pressure steam, which spun a turbine, which in turn drove the turbopumps that delivered the needed huge quantity of alcohol and liquid oxygen into the combustion chamber.

After an initial test of this permanganate-peroxide reaction proved somewhat disappointing (and messy) he moved on to a more controllable approach — using a catalytic converter from a petrol scooter in place of the messy permanganate. This worked, so the next task was to build the turbine. Naturally, this was 3D printed, and the resulting design appeared to work pretty well with compressed air as the power source. After scaling up the design, and shifting to CNC-machined aluminium, it was starting to look a bit more serious. The final test shows the turbine being put through its paces, running from the new precious metal catalyst setup, but as can be seen from the video, there is work to be done.

There appears to be a fair amount of liquid peroxide passing through into the turbine, which is obviously not desirable. Perhaps the next changes should be the mount the catalyser vertically, to prevent the liquid from leaving so easily, as well as adding some baffling to control the flow of the liquid, in order to force it to recycle inside the reaction vessel? We can’t wait to see where this goes, hopefully the steam-turbine powered skateboard idea could actually be doable? Who knows? But we’re sure [Integza] will find a way!

With steam power, there’s more than one way to get usable rotational work, like using a reciprocating engine, which can be expanded to a whole machine shop, and whilst boiling water (or catalytically decomposing Hydrogen Peroxide) provides high pressure gas, how about just using boiling liquid nitrogen? Possibly not.

Continue reading “A V2 Rocket Inspired Steam Turbine Skateboard Is Just Around The Corner” →

Astrophotography On The Game Boy Camera

April 8, 2022 by Bryan Cockfield 4 Comments

The Game Boy Camera was the first digital camera that many of us ever interacted with. At the time it was fairly groundbreaking to take pictures without film, even though the resolution was extremely low by modern standards, and it could only shoot two-bit color. It’s been long enough since its release that it’s starting to become a popular classic with all kinds of hacks and modifications, like this one which adds modern SLR camera lenses which lets it take pictures of the Moon.

The limitations of the camera make for a fairly challenging build. Settings like exposure are automatic on the Game Boy Camera and can’t be changed, and the system only allows the user to change contrast and brightness. But the small sensor size means that astrophotography can be done with a lens that is also much smaller than a photographer would need with a modern DSLR. Once a mount was 3D printed to allow the lenses to be changed and a tripod mount was built, it was time to take some pictures of the moon.

Thanks to the interchangeability of the lenses with this build, the camera can also capture macro images as well. The build went into great detail on how to set all of this up, even going as far as giving tips for how to better 3D print interlocking threads, so it’s well worth a view. And, for other Game Boy Camera builds, take a look at this one which allows the platform to send its pictures over WiFi.

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Custom Macro Keyboard With Sweet Backlighting

April 7, 2022 by Bryan Cockfield 10 Comments

From the smallest 60% keyboards for those with no desk space to keyboards with number pads for those doing data entry all day, there’s a keyboard size and shape for just about everyone. The only problem, even with the largest keyboards, is that they’re still fairly limited in what they can do. If you find yourself wishing for even more functionality, you might want to build something like this custom macro keyboard with built-in LED backlighting.

Rather than go with a standard mechanical keyboard switch like a Cherry MX, this build is based around TS26-2 pushbuttons with built-in LED lighting. [atkaper] only really needed one button for managing the mute button on MS Teams, but still built a total of eight switches into this keyboard which can all be individually programmed with different functions. The controller is an Arduino Leonardo and the enclosure was 3D printed.

Paired with the classic IBM Model M keyboard, this new macro keyboard adds plenty of functionality while also having control over LED backlighting. Macro keyboards are incredibly useful, especially with their ability to easily change function with control over the software that runs on them. The key to most builds is the 32U4 chip found in some Atmel microcontrollers which allows it to easily pass keyboard (and mouse) functionality to any computer its plugged in to.

the water gravity air powered engine running

Gravity-Water-Air Powered Engine

March 28, 2022 by Matthew Carlson 19 Comments

Air engines are a common occurrence here on Hackaday. They’re relatively novel and reasonably easy to 3D print without requiring any fluids or supporting machinery. For example, [Tom Stanton] took a previous air engine design, did away with the air compressor, and instead used gravity and water to create just a few PSI to run the engine.

The basic setup is to have a large jug of water up somewhere high. Flexible tubing runs down to [Tom’s] custom acrylic pressure chamber. A little CNC-ing and some epoxy made a solid chamber, and we’re happy to report that [Tom] did some initial simulation before construction to make sure he wasn’t accidentally building a bomb. Some back of the napkin math showed that he could expect around 0.6 bar (around eight psi) with his setup. His first test showed almost precisely that. Unfortunately, [Tom] ran into some issues despite the early success. His engine would stop as it drew air and the pressure dropped, and the replenishing rate of the pressure was limited by the relatively small inlet hole he had drilled.

To fix this, he printed a larger diaphragm for the engine, so the lower air pressure had more to push against. This allowed the engine to run for a good while before the tank filled up. Additionally, he smoothed and polished everything, so it was as low friction as possible. We know we often state it here, but it is incredible what can be achieved with 3D printed parts these days.

We love seeing the iteration evident in this video. The various engine versions splayed across the table offer a powerful story about [Tom’s] persistence. Powering an engine is a small step to powering your whole home.

Continue reading “Gravity-Water-Air Powered Engine” →

3D Printed Portal Turret Moves And Talks Like The Real Thing

March 27, 2022 by Robin Kearey 19 Comments

Thanks to its innovative gameplay and quirky humor, Portal became an instant hit when it was released in 2007. Characters became cultural icons, quotes became memes and the game became a classic along with its 2011 sequel. Even today, more than a decade later, we regularly see hackers applying their skills in recreating some of the game’s elements. One beautiful example is [Joran de Raaff]’s physical rendition of a Portal Turret.

A 3D CAD drawing of a Portal Turret — Inside the Turret it’s full of moving parts.

[Joran] decided to use his 3D printer to create a Turret that can move and speak exactly as it does in the game. The result, as you can see in the video embedded below, was a triumph. We’re making a note here, “huge success”. The outer shell is a beautiful shiny white, an effect achieved through patient sanding, priming, and spraying with high-gloss paint. The internals are even more impressive with servos, microswitches, and a whole array of 3D-printed gears, cams, and levers.

A motion sensor activates the Turret whenever a human moves nearby. It will then open its wings and fire its guns while playing the corresponding sounds from the game. Its brains are formed by a Wemos D1 which drives the various LEDs and servos, while an MP3 player board holds a library of sound bites and plays them through a speaker hidden inside the Turret’s shell.

After posting his creation on YouTube [Joran] got many requests for the 3D files, so he made them available and wrote a comprehensive build guide. This should enable anyone with a 3D printer to build this neat gun, without getting too much science done. If this model is too small for you, then perhaps this life-sized model is more to your liking. If you prefer your Turret small and cute, check out this plushie version.

Continue reading “3D Printed Portal Turret Moves And Talks Like The Real Thing” →