Raspberry Pi

1835 Articles

Raspi-Powered Typewriter Is A Real MUSE

September 5, 2023 by 4 Comments

Thanks to parenting and life in general, [Brendan] had fallen out of the habit of writing and wasn’t happy about it. If you write anything ever, you already know there are endless distractions when it comes to doing so on a computer. Sure, there always typewriters, but it’s difficult to do anything with the fruits of a typewriter other than scan it in or make copies, and it’s basically un-editable except by hand.

Instead of just sitting down and writing, [Brendan] did what any of us would do — took the time to create an elegant solution. The Most Unusual Sentence Extractor, or MUSE, is a Raspberry Pi-based typewriter with the best of both worlds. It’s essentially a word processor, but it can save to the cloud.

[Brendan] found beautiful inspiration in the Olympia Traveller de Luxe typewriter, a delightfully boxy affair made in the 1960s and 70s with lovely keys. Starting with a 68Keys.io board, [Brendan] set about re-creating the lines of the Traveller de Luxe in Tinkercad.

Since it doesn’t really need a platen, this was the perfect place to mount a screen using black PVC. At first, [Brendan] was going to use an e-ink screen, but a mishap led to a better solution — an LCD touchscreen that makes document navigation a breeze.

We absolutely love the look of this machine, which was obviously a labor of love. And yeah, it does the trick:[Brendan] is writing again. Though it maybe be inconvenient, we agree that it really is nice to have a dedicated workstation for certain things.

Looking for the complete opposite of this project? How about a Chat GPT-assisted daisywheel typewriter?

Hackaday Prize 2023: Ubo Project: Building For Builders

August 24, 2023 by 6 Comments

The Ubo Pod by [Mehrdad Majzoobi] is a very highly polished extension pack and enclosure for the Raspberry Pi 4, which shows you how far you can go to turn a bare PCB into something that rivals the hardware offerings from Google and others. Gadgets like the Sonos speakers and Amazon or Google’s covert listening devices (aka Echo, Alexa, or whatever they’re branded as) are fun to play with. Still, the difficulty of hacking custom applications into them and god-forbid adding one’s own extension hardware, makes them fairly closed ecosystems. Add in the concerns of privacy and data security; they look less and less attractive the closer you look. Luckily the Raspberry Pi and its friends have improved the accessibility to the point where it’s positively easy to create whatever you want with whatever hardware you need, and to that end we think [Mehrdad] has done a splendid job.

The custom top PCB sits below the wooden top surface, hosting a central LCD display with push buttons located around it. Also sitting atop are some IR transmitters and receivers as well as RGB LEDs for the ring lighting. This top PCB acts as a RPi hat, and plugs into an RPi4 below, which then attaches to a side board via some PCB-mounted connectors, matching up with the USB and audio connectors. This board seems to act purely as an interconnect and form-factor adaptor allowing interfaces to be presented more conveniently without needing wires. This makes for a very clean construction. Extensive use of resin printing is shown, with lots of nice details of how to solve problems such as LED diffusion and bleeding. Overall, a very slick and well-executed project, that is giving us a few ideas for our own projects.

This type of project is commonplace on these fair pages, like this DIY smart speaker for example. With the supply of pi being still a little difficult to deal with, could you roll your own or get an alternative? What about just using your old mobile phone?

The HackadayPrize 2023 is Sponsored by:

Polaroid Develops Its Pictures Remotely

August 16, 2023 by 8 Comments

For those who didn’t experience it, it’s difficult to overstate the cultural impact of the Polaroid camera. In an era where instant gratification is ubiquitous, it’s easy to forget that there was a time when capturing a photograph meant waiting for film to be developed or relying on the meticulous art of darkroom processing. Before the era of digital photography, there was nothing as close to instant as the Polaroid. [Max] is attempting to re-capture that feeling with a modified Polaroid which instantly develops its pictures in a remote picture frame.

The build is based on a real, albeit non-functional, Polaroid Land Camera. Instead of restoring it, a Raspberry Pi with a camera module is placed inside the camera body and set up to capture pictures. The camera needs to connect to a Wi-Fi network before it can send its pictures out, though, and it does this automatically when taking a picture of a QR code. When a picture is snapped, it sends it out over the Internet to wherever the picture frame is located, which has another Raspberry Pi inside connected to an e-ink screen. Once a picture is taken on the camera it immediately shows up in the picture frame.

To help preserve the spirit of the original Polaroid, at no point is an image saved permanently. Once it is sent to the frame, it is deleted from the camera, and the next picture taken overwrites the last. And, for those who are only familiar with grayscale e-ink displays as the integral parts of e-readers, there have been limited options for color displays for a while now, as we saw in this similar build which was painstakingly built into a normal-looking picture frame as part of an attempted family prank.

Continue reading “Polaroid Develops Its Pictures Remotely” →

Blackberry Pi Puts Desktop Linux In Your Pocket

August 12, 2023 by 32 Comments

Let’s face it — Android wasn’t what most of us had in mind when we imagined having Linux running on our phones. While there’s a (relatively) familiar kernel hiding at the core of Google’s mobile operating system, the rest of the environment is alien enough that you can’t run Linux software on it without jumping through some hoops. While that’s fine for most folks, there remains a sizable group of users who still dream of a mobile device that can run a full Linux operating system without any compromises.

Judging by the work put into the Blackberry Pi, we’re willing to bet that [IMBalENce] falls into that camp. The custom handheld combines the Raspberry Pi Zero, a 320×240 LCD, and the BBQ20KBD keyboard from Solder Party with a 2500 mAh LiPo pouch cell and associated charging circuitry. Optionally, it also supports modules such as the Raspberry Pi Camera, a Real-Time-Clock, a ADS1015 ADC to read the battery voltage, and even a USB hub — although you can’t have all the goodies installed at once as it draws too much current.

Everything is packed into a 3D printed case that looks roughly like an original DMG-01 Game Boy if somebody replaced the bottom half with a tiny keyboard. We appreciate the ZX Spectrum theme, even if it’s not immediately clear how it relates to the project other than being an excuse to play around with multi-color printing. [IMBalENce] says the final product works quite well, though the relatively limited keys on the BlackBerry keyboard does make it tricky to use the device for writing code.

Interested in mobile Linux, but not trying to build the hardware yourself? We recently took a look at the SQFMI Beepy, which is fairly similar in terms of hardware, but very much in need of some talented penguin wranglers who are willing to come in and work on the software and documentation. Think you’re up for the challenge?

Running DOOM In A Keycap Takes Careful Work

August 9, 2023 by 4 Comments

Shoehorning DOOM into different hardware is a classic hacker’s exercise, and [TheKeebProject] managed to squeeze the 1993 classic into a custom keycap with the help of a Raspberry Pi RP2040, a custom PCB, and a clear resin enclosure. It even has a speaker for sound!

All processing is done inside the keycap, which is a clever feat. There is a USB connection, but it’s only for power and keyboard controls, so it’s completely playable without needing a whole lot of external support. The custom PCB and code are based off an earlier RP2040 DOOM project, and [TheKeebProject] has certainly made it their own by managing to get everything so tightly integrated. There’s a quick video mashup embedded below. There’s still a bit of work to do, but the code and design files are all on GitHub should you wish for a closer look.

Making DOOM physically smaller is a good challenge, but we’d like to remind fans that we’ve also seen DOOM shrink in terms of power consumption, all the way down to 1 mW.

Continue reading “Running DOOM In A Keycap Takes Careful Work” →

Get MOST Into Your Pi

August 3, 2023 by 15 Comments

When looking the modify a passenger vehicle, the Controller Area Network (CAN) bus is a pretty easy target. In modern vehicles it has access to most of the on-board systems — everything from the climate control to the instrument cluster and often even the throttle, braking, and steering systems. With as versatile as the CAN bus is, though, it’s not the right tool for every job. There’s also the Media Oriented Systems Transport (MOST) bus which is increasingly found in automotive systems to handle multimedia such as streaming music to the stereo. To access that system you’ll need to approach it slightly differently as [Rhys] demonstrates.

[Rhys] has been working on replacing the dated head unit in his Jaguar, and began by investigating the CAN bus. He got almost everything working with replacement hardware except the stereo, which is where the MOST bus comes into play. It provides a much higher bandwidth than the CAN bus can accommodate but with almost no documentation it was difficult to interact with at first. With the help of a Raspberry Pi and a lot of testing he is able to get the stereo working again with a much more modern-looking touchscreen for control. It is also able to do things like change CDs in the car’s CD player, gather song information from the CD to display on the panel, and can perform other functions of the infotainment center.

For more detailed information on the MOST bus, [Rhys] also maintains a website where he puts his discoveries and other information he finds about this system. Unfortunately car stereo systems in modern vehicles can get pretty complicated these days, but adapting car stereos in older vehicles to modern technology carries some interesting challenges as well.

Continue reading “Get MOST Into Your Pi” →

Solar Power Your Pi

August 2, 2023 by 9 Comments

Running a Raspberry Pi with solar power sounds easy. Of course, like most things, the details are what get you. About a year ago, [Bystroushaa] tried it without success. But the second time turned out to be the charm.

Of course, success is a relative term. It does work, but there is concern that it won’t be sufficient in the winter. In addition, if the battery dies, everything doesn’t restart automatically. Still, it is usable, and there should be ways to solve those problems.

The original attempt used a PiJuice hat and solar panel. This time, the design didn’t use these, opting instead for a LiFePO4 battery, a solar regulator, and a solar panel. The rest of it comes down to mechanical and physical mounting. The cheap regulator has some drawbacks. For example, it doesn’t allow for monitoring like more expensive units. It also cannot balance the cells periodically, although that could be done with an external controller.

We’ve seen solar-powered Pi boards before. Or, try a Game Boy.