You don’t see them as often as you used to, but it used to be common to see “electronics trainers” which were usually a collection of components and simple equipment combined with a breadboard, often in a little suitcase. We think [Pro Maker_101’s] portable electronics workstation is in the same kind of spirit, and it looks pretty nice.

The device uses a 3D printed case and a custom PC board. There are a number of components, although no breadboard. There is a breakout board for Raspberry Pi GPIO, though. So you could use the screw terminals to connect to an external breadboard. We were thinking you could almost mount one as a sort of lid so it would open up like a book with the breadboard on one side and the electronics on the other. Maybe version two?

One thing we never saw on the old units? An HDMI flat-screen display! We doubt you’d make one exactly like this, of course, but that’s part of the charm. You can mix and match exactly what you want and make the prototyping station of your dreams. Throw in a small portable soldering iron, a handheld scopemeter, and you can hack anywhere.

We’d love to see something like this that was modular. Beats what you could build in 1974.

One of the most exciting trends we’ve seen over the last few years is the rise of truly personal computers — that is, bespoke computing devices that are built by individuals to fit their specific needs or wants. The more outlandish of these builds, often inspired by science fiction and sporting non-traditional layouts, tend to be lumped together under the term “cyberdecks”, but there are certainly builds where that description doesn’t quite stick, including the Cyber Writer from [Darbin Orvar].

With a 10-inch screen, you might think it was intended to be a portable, but its laser-cut Baltic birch plywood construction says otherwise. Its overall design reminds us of early computer terminals, and the 60% mechanical keyboard should help reinforce that feeling that you’re working on a substantial piece of gear from yesteryear.

The Cyber Writer is powered by the Raspberry Pi Zero W 2, which might seem a bit underpowered, but [Darbin] has paired it with a custom minimalist word processor. There’s not a lot of detail about the software, but the page for the project says it features integrated file management and easy email export of documents.

The software isn’t yet available to the public, but it sounds like [Darbin] is at least considering it. Granted, there’s already distraction-free writing software out there, but we’re pretty firm believers that there’s no such thing as too many choices.

If you’re looking for something a bit more portable, the impressive Foliodeck might be more your speed.

Recently Raspberry Pi publicly announced the release of their new rpi-image-gen tool, which is advertised as making custom Raspberry Pi OS (i.e. Debian for specific Broadcom SoCs) images in a much more streamlined fashion than with the existing rpi-gen tool, or with third-party solutions. The general idea seems to be that the user fetches the tool from the GitHub project page, before running the build.sh script with parameters defining the configuration file and other options.

The main advantage of this tool is said to be that it uses binary packages rather than (cross-)compiling, while providing a range of profiles and configuration layers to target specific hardware & requirements. Two examples are provided in the GitHub project, one for a ‘slim’ project, the other for a ‘webkiosk‘ configuration that runs a browser in a restricted (Cage) environment, with required packages installed in the final image.

Looking at the basic ‘slim’ example, it defines the INI-style configuration in config/pi5-slim.cfg, but even when browsing through the main README it’s still somewhat obtuse. Under device it references the mypi5 subfolder which contains its own shell script, plus a cmdline.txt and fstab file. Under image it references the compact subfolder with another bunch of files in it. Although this will no doubt make a lot more sense after taking a few days to prod & poke at this, it’s clear that this is not a tool for casual users who just want to quickly put a custom image together.

This is also reflected in the Raspberry Pi blog post, which strongly insinuates that this is targeting commercial & industrial customers, rather than hobbyists.

The MintyPi was a popular project that put a Raspberry Pi inside an Altoids tin to make a pocketable gaming handheld. Unfortunately, it’s not the easiest build to replicate anymore, but [jackw01] was still a fan of the format. Thus was born the Pi Tin—a clamshell handheld for portable fun!

The build is based around the Raspberry Pi Zero 2W, which packs more power than the original Pi Zero into the same compact form factor. It’s combined with a 320 x 240 TFT LCD screen and a 2000 mAh lithium-polymer battery which provides power on the go.

There are also a pair of custom PCBs used to lace everything together, including the action buttons, D-pad, and power management hardware. Depending on your tastes, you have two main enclosure options. You can use the neat 3D printed clamshell seen here in beautiful teal, or you can go with the classic Altoids tin build—just be careful when you’re cutting it to suit! Files can be found on GitHub for the curious.

We love a good handheld project around these parts; it’s particularly awesome how much gaming you can fit in your pocket given the magic of the Raspberry Pi and modern emulation. If you’re cooking up your own little retro rig, don’t hesitate to let us know!

Back in 2023, we first brought you word of the PiEEG: a low-cost Raspberry Pi based device designed for detecting and analyzing electroencephalogram (EEG) and other biosignals for the purposes of experimenting with brain-computer interfaces. Developed by [Ildar Rakhmatulin], the hardware has gone through several revisions since then, with this latest incarnation promising to be the most versatile and complete take on the concept yet.

At the core of the project is the PiEEG board itself, which attaches to the Raspberry Pi and allows the single-board computer (SBC) to interface with the necessary electrodes. For safety, the PiEEG and Pi need to remain electrically isolated, so they would have to be powered by a battery. This is no problem while capturing data, as the Pi has enough power to process the incoming signals using the included Python tools, but could be an issue if you wanted to connect the PiEEG system to another computer, say.

For the new PiEEG Kit, the hardware is now enclosed in its own ABS carrying case, which includes an LCD right in the lid. While you’ve still got to provide your own power (such as a USB battery bank), having the on-board display removes the need to connect the Pi to some other system to visualize the data. There’s also a new PCB that allows the connection of additional environmental sensors, breakouts for I2C, SPI, and GPIO, three buttons for user interaction, and an interface for connecting the electrodes that indicates where they should be placed on the body right on the silkscreen.

The crowdsourcing campaign for the PiEEG Kit is set to begin shortly, and the earlier PiEEG-16 hardware is available for purchase currently if you don’t need the fancy new features. Given the fact that the original PiEEG was funded beyond 500% during its campaign in 2023, we imagine there’s going to be plenty of interest in the latest-and-greatest version of this fascinating project.

Glasses for the blind might sound like an odd idea, given the traditional purpose of glasses and the issue of vision impairment. However, eighth-grade student [Akhil Nagori] built these glasses with an alternate purpose in mind. They’re not really for seeing. Instead, they’re outfitted with hardware to capture text and read it aloud.

Yes, we’re talking about real-time text-to-audio transcription, built into a head-worn format. The hardware is pretty straightforward: a Raspberry Pi Zero 2W runs off a battery and is outfitted with the usual first-party camera. The camera is mounted on a set of eyeglass frames so that it points at whatever the wearer might be “looking” at. At the push of a button, the camera captures an image, and then passes it to an API which does the optical character recognition. The text can then be passed to a speech synthesizer so it can be read aloud to the wearer.

It’s funny to think about how advanced this project really is. Jump back to the dawn of the microcomputer era, and such a device would have been a total flight of fancy—something a researcher might make a PhD and career out of. Indeed, OCR and speech synthesis alone were challenge enough. Today, you can stand on the shoulders of giants and include such mighty capability in a homebrewed device that cost less than $50 to assemble. It’s a neat project, too, and one that we’re sure taught [Akhil] many valuable skills along the way.

Hackers enjoy a good theme, and so it comes as no surprise that every time March 14th (Pi Day) rolls around, the tip line sees an uptick in mathematical activity. Whether it’s something they personally did or some other person’s project they want to bring to our attention, a lot of folks out there are very excited about numbers today.

One of our most prolific circumference aficionados is [Cristiano Monteiro], who, for the last several years, has put together a special project to commemorate the date. For 2025, he’s come up with a robotic hand that will use its fingers to show the digits of Pi one at a time. Since there’s only one hand, anything higher than five will be displayed as two gestures in quick succession, necessitating a bit of addition on the viewer’s part.

[Cristiano] makes no claims about the anatomical accuracy of his creation. Indeed, if your mitts look anything like this, you should seek medical attention immediately. But whether you think of them as fingers or nightmarish claws, it’s the motion of the individual digits that matter.

To that end, each one is attached to an MG90 servo, which an Arduino Nano drives with attached Servo Shield. From there, it’s just a matter of code to get the digits wiggling out the correct value, which [Cristiano] has kindly shared for anyone looking to recreate this project.

If you’re hungry for more Pi, the ghostly display that [Cristiano] sent in last year is definitely worth another look. While not directly related to today’s mathematical festivities, the portable GPS time server he put together back in 2021 is another fantastic build you should check out.

Do you like scientific calculators? Don’t bother answering that question, you’re reading Hackaday so we already know the answer. We also know you’re a fan of building things yourself and open source, which makes us fairly sure you’ll be just as interested in the recently announced ClockworkPi PicoCalc as we are.

On the surface, it looks like a chunky scientific calculator, though on further inspection you’ll note it comes equipped with a QWERTY keyboard. But open up the case and what you’ve really got is an elaborate carrier board for the Raspberry Pi Pico. The PicoCalc supports all variants of the microcontroller, but realistically we can’t think of any reason that you wouldn’t just use the latest version.

With the MCU connected, you’ll have access to the PicoCalc’s 320×320 4-inch IPS screen, backlit I2C-connected keyboard, SD card slot, 8 MB PSRAM, and dual PWM speakers. Power is provided by a pair of 18650 cells (which you’ll need to supply on your own), and the board has the necessary circuitry to charge them up over USB-C.

Everything is housed in an injection molded case, but the project page says all the necessary CAD files will be eventually be released under the GPL v3 so you can 3D print or CNC your own enclosure. For now though, the only thing of note that seems to be in the PicoCalc GitHub repository is a PCB schematic.

The software side of things is a little less clear. The page mentions a BASIC interpreter, MP3 playback, and support for various programming languages, but we get the impression that’s just a list of stuff you can run on the Pi Pico. There are a few images that clearly show the PicoCalc actually being used as a calculator however, so there may be an official firmware yet to be revealed.

The PicoCalc kit is on sale now, and will set you back $75 USD — which actually includes a first-generation Pi Pico, on the off chance that you don’t already have a few laying around. We’ve been impressed with the previous offerings from ClockworkPi, so assuming this new kit maintains that same build quality, it seems like a fair enough price.

How many cars go down your street each day? How fast were they going? What about folks out on a walk or people riding bikes? It’s not an easy question to answer, as most of us have better things to do than watch the street all day and keep a tally. But at the same time, this is critically important data from an urban planning perspective.

Of course, you could just leave it to City Hall to figure out this sort of thing. But what if you want to get a speed bump or a traffic light added to your neighborhood? Being able to collect your own localized traffic data could certainly come in handy, which is where TrafficMonitor.ai from [glossyio] comes in.

This open-source system allows the user to deploy an affordable monitoring device that will identify vehicles and pedestrians using a combination of machine learning object detection and Doppler radar. The system not only collects images of all the objects that pass by but can even determine their speed and direction. The data is stored and processed locally and presented via a number of graphs through the system’s web-based user interface.

While [glossyio] hopes to sell kits and even pre-built monitors at some point, you’ll have to build the hardware yourself for now. The documentation recommends a Raspberry Pi 5 for the brains of your monitor, backed up by a Coral AI Tensor Processing Unit (TPU) to help process the images coming in via the Pi Camera Module 3.

Technically, the OPS243-A Doppler radar sensor is listed as optional if you’re on a tight budget, but it looks like you’ll lose speed and direction sensing without it. Additionally, there’s support for adding an air quality sensor to see what all those passing cars are leaving behind.

This isn’t the first time we’ve seen the Raspberry Pi used as an electronic traffic cop, but it’s undoubtedly the most polished version of the concept we’ve come across. You might consider passive radar, too.

Gonzo journalism has been a hip thing since the 1970s or so, a way of covering a story in a compelling format with more subjectivity and less objectivity. The style has since been applied to all sorts of media, including film—and indeed, the makers of the Gonzo Pi.

The Gonzo Pi is a camera with an open source design, yes, but it’s also a lot more than that. It’s intended to be an entire platform for film-making, all in the one housing. Camera-wise, the design combines a Raspberry Pi with the requisite first-party High Quality Camera, and warps it up in a 3D printed housing. You can build it up with a viewfinder and whatever old-school C-mount or 8 mm film lenses you can lay your hands on.

Beyond that, there’s an editing platform baked in to the device. It’s not unlike the tools in so many social media apps these days. The idea of the Gonzo Pi is that rather than shooting a whole ton of footage and takes and poring over them in great detail later, instead, you run and gun with the device and edit as you go. You can shoot retakes as you need, and even dub in more audio as necessary as you compose your film on the hoof. It’s intended to change the way you make films by virtue of its unique compositional paradigm.

We’ve featured some neat homebrew cameras before, to be sure, but none that quite put the edit suite right in the box.

[Thanks to Moritz for the tip!]

[Nicholas LaBonte] shows off a Cyberdeck Handheld that demonstrates just how good something can look when care and attention goes into the design and fabrication. He wanted to make something that blended cyberpunk and nautical aesthetics with a compact and elegant design, and we think he absolutely succeeded.

On the inside is a Raspberry Pi and an RTL-SDR. The back of the unit is machined from hardwood, and sports a bronze heat sink for the Raspberry Pi. The front has a prominent red PSP joystick for mouse input and a custom keyboard. The keyboard is especially interesting. On the inside it’s a custom PCB with tactile switches and a ATmega32U4 running QMK firmware — a popular choice for DIY keyboards — and presents to the host as a regular USB HID device.

How did he make those slick-looking keys? It’s actually a single plate that sits between the front panel and the switches themselves. [Nicholas] used a sheet of polymer with a faux-aluminum look to it and machined it down, leaving metal-looking keys with engraved symbols as tabs in a single panel. It looks really good, although [Nicholas] already has some ideas about improving it.

On the right side is the power button and charging port, and astute readers may spot that the power button is where a double-stack of USB ports would normally be on a Raspberry Pi 5. [Nicholas] removed the physical connectors, saving some space and connecting the USB ports internally to the keyboard and SDR.

As mentioned, [Nicholas] is already full of ideas for improvements. The bronze heat sink isn’t as effective as he’d like, the SDR could use some extra shielding, and the sounds the keyboard ends up making could use some work. Believe it or not, there’s still room to spare inside the unit and he’d maybe like to figure out a way to add a camera, GPS receiver, or maybe a 4G modem. We can’t wait! Get a good look for yourself in the video, embedded below.

In the decade or more since small inexpensive Linux-capable single board computers such as the Raspberry Pi came to the mainstream, many a hardware hacker has turned their attention to making a portable computer using one. With such a plethora of devices having been made one might think that the Pi handheld was a done deal, but every so often along comes a new one of such quality to re-ignite the genre. So it is with [Taylor Hay]’s BlackberryPi Handheld. As you might guess from the name, it uses a BlackBerry keyboard along with a square LCD screen to create a beautifully executed Pi handheld in an almost GameBoy-like form factor.

It starts with a beautifully designed and executed case that holds a Pi and a Pimoroni HyperPixel screen. Unexpectedly this is a full-size Pi, we think a Pi 4. The keyboard is a USB enhanced Blackberry module which also has the famous trackpad, and there’s a bezel on the front to protect the screen. The power meanwhile comes from three 18650 cells inside the back of the case, with a power bank PCB. The surprise here is how simple he’s made it by careful choice of modules, the usual rats-nest of wires is missing.

The files are available so you can make your own, and he’s actively encouraging people to remix and improve it. We like this project, a lot, and after you’ve seen the video below the break, we think you will too. Oddly, this isn’t the first time we’ve seen someone try this combination.

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