Three different keyboard devices with greyscale LCDs on top are on a white table. In the back left is a beige one with grey keys, front and center is a black model, and to the right is a translucent blue model with black keys being held up by a hand.

A Brief History Of AlphaSmart

July 29, 2024 by 18 Comments

There are a handful of gadgets that do one thing so well that they become cult classics long after the company that made them has moved on or closed up shop. [This Does Not Compute] takes us through the history of the AlphaSmart word processor which started as an educational tool, but finds itself in many a writer’s bag today.

The original AlphaSmart bears more than a passing resemblance to its Apple contemporaries since the company was founded by two Apple engineers. The Cupertino company didn’t see the value in the concept, but didn’t lean on any non-competes to keep the pair from pursuing the idea on their own time either. What resulted was a dead simple word processor that could be had for 1/5 of what a new computer typically cost in the era, which was particularly attractive for the target market of schools.

After several successful years, the pressure of PDAs and then smartphones from one side and cheaper laptops from the other meant school districts no longer wanted single-purpose devices when they could have a fully-fledged computing experience for students. We wonder if that was the right call, with so many now wanting distraction-free devices, but it was the end of the road for the company either way.

Our own [Kristina Panos] and [Tom Nardi] have shown us the guts of the Neo and of one of its competitors, the Writer, respectively. If you have a Neo of your own in need of replacement keycaps, you can print them.

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Hacker Tactic: Multi-Design Panels

July 29, 2024 by 11 Comments

Last time, we talked about single-PCB-design panels, all the cool aspects of it, including some cost savings and handling convenience. Naturally, you might wonder, and many did – can you put multiple different PCBs on a single panel? The answer is “yes, without a doubt!” The tool we used last time, KiKit, will not be as helpful here, so we’ll be looking elsewhere.

Making multi-PCB panels can help you save money, naturally, but it can also make your assembly a whole lot easier, and it can bring you hacking to a whole new level. It sure helped with mine! You might have already learned that some fabs scoff at multi-design panels and add surcharges. Well, you’ll be delighted to learn that there are more hacker-friendly fabs out there, too.

Developing PCBs In Bulk

So far, I’ve worked on about 300 different PCB designs, with half of them available in my monorepo. I’ve assembled and tested just about half of these. You might guess that this would cost a lot of money, and that assembly would take a fair bit of time, but I have some tricks up my sleeve. For a start, you can easily order PCBs 10-12 times more cheaply if you do multi-panel.

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A Soviet Cassette Recorder Receiving Some Love

July 29, 2024 by 40 Comments

For those of us who lived in the capitalist west during the Cold War, there remains a fascination to this day about the Other Side. The propaganda we were fed as kids matched theirs in describing the awful things on the other side of the wall, something that wasn’t borne out when a decade or so later in the 1990s we met people from the former communist side and found them unsurprisingly to be just like us. It’s thus still of interest to have a little peek into Eastern Bloc consumer electronics, something we have the chance of courtesy of [DiodeGoneWild], who’s fixing a 1980s Soviet cassette recorder.

The model in question is a Vesna 309, and it has some audio issues and doesn’t turn the tape. It gets a teardown, the motor is cleaned up inside, and a few capacitor and pot cleanups later it’s working again. But the interest lies as much in the machine itself as it does in the repair, as it’s instructive to compare with a Western machine of the same period.

We’re told it would have been an extremely expensive purchase for a Soviet citizen, and in some ways such as the adjustable level control it’s better-specified than many of our equivalents. It’s based upon up-to-date components for its era, but the surprise comes in how comparatively well engineered it is. A Western cassette deck mechanism would have been a much more sketchy affair than the substantial Soviet one, and its motor would have been a DC part with a simple analogue speed controller rather than the brushless 3-phase unit in the Vesna. Either we’re looking at the cassette deck for senior comrades only, or the propaganda was wrong — at least about their cassette decks. The full video is below, and if you’re hungry for more it’s not the first time we’ve peered into electronics from the eastern side of the Iron Curtain.

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An Antenna To Throw You For A Loop

July 29, 2024 by 27 Comments

It is one of Murphy’s laws, we think, that you can’t get great things when you need them. Back in the heyday of shortwave broadcasting, any of us would have given a week’s pay for even a low-end receiver today. Digital display? Memory? Digital filtering? These days, you have radios, and they aren’t terribly expensive, but there isn’t much to listen to. Making matters worse, it isn’t easy these days to string wires around in your neighborhood for a variety of reasons. Maybe you don’t have a yard, or you have deed restrictions, or your yard lacks suitable space or locations. This problem is so common that there are a crop of indoor antennas that seem attractive. Since I don’t often tune in shortwave and I don’t want to have to reset my antenna after every storm, I decided to look at the Tecsun AN-48X along with a YouLoop clone from China. Let’s start with the Tecsun. Continue reading “An Antenna To Throw You For A Loop” →

MIDI Controller In A Cubic Inch

July 27, 2024 by 2 Comments

MIDI as a standard has opened up a huge world to any musician willing to use a computer to generate or enhance their playing and recording. Since the 80s, it has it has revolutionized the way music is produced and performed, allowing for seamless integration of digital instruments, automation of complex sequences, and unprecedented control over everything from production to editing. It has also resulted in a number of musical instruments that probably wouldn’t be possible without electronic help, like this MIDI instrument which might be the world’s smallest.

Fitting into a cubic inch of space, the tiny instrument’s volume is mostly taken up by the MIDI connector itself which was perhaps an acceptable size by 1980s standards but seems rather bulky today. A two-layer PCB split into three sections sandwiches the connector in place and boasts an ATtiny85 microcontroller and all the associated electronics needed to implement MIDI. Small threaded screws hold the platform together and provide each layer with a common ground. Four small pushbuttons at the top of the device act as the instrument’s keys.

The project’s creator (and Hackaday alum!) [Jeremy Cook] has it set up to play notes from a piano right now, but has also made the source code available so that any musical action can be programmed onto these buttons. Flexibility is perhaps MIDI’s greatest strength and why the standard has lasted for decades now, as it makes it fairly straightforward to build more comprehensive, easy-to-learn musical instruments or even musical instruments out of retro video game systems.

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Linux Fu: Failing Pipelines

July 25, 2024 by 16 Comments

Bash is great for automating little tasks, but sometimes a little script you think will take a minute to write turns into a half hour or more. This is the story of one of those half-hour scripts.

I have too many 3D printers. In particular, I have three that are almost — but not exactly — the same, so each one has a slightly different build process when I want to update their firmware. In all fairness, one of those printers is heading out the door soon, but I’ll probably still wind up building firmware images for it.

My initial process was painful. I have a special directory with the four files needed to configure Marlin for each machine. I copy all four files and ask PlatformIO to perform the build. Usually, it succeeds and gives me a file that looks like firmware-yyyyddmmhhmm.bin or something like that.

The problem is that the build process doesn’t know which of the three machines is the target: Sulu, Checkov, or Fraiser. (Long story.) So, I manually look at the file name, copy it, and rename it. Of course, this is an error-prone process, and I’m basically lazy, so I decided to write a script to do it. I figured it would take just a minute to bundle up all the steps. I was wrong.

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Retro Inspired Cyberdeck Scrolls Around Cyberspace

July 25, 2024 by 24 Comments

It’s difficult to nail down exactly what counts as a “real” cyberdeck in this brave new era of bespoke computing. But at the minimum, most in the community would agree that a proper deck should have a non-traditional form factor, and be designed to meet the unique needs of the builder. If you’re looking for a fantastic example of both concepts, check out the Cyberdore 2064 from [Tommi L].

At first glance the 3D printed enclosure of the Cyberdore looks a bit like a Speak & Spell, but it’s really more of an amalgamation of everything that made 1980s computers so unique. You’ve got the vents, the chunky switches, the undersized display, and of course, the handle. The case might have been extruded in 2024, but it’s doing a fantastic impression of a piece of tech from 40 years ago.

One of the key external features of the Cyberdore 2064 is the side-mounted rotary encoder that allows for smoothly scrolling through online feeds (such as your favorite hardware hacking site) or long documents. The cheap and easy to work with KY-040 encoder has been converted to a USB input device by way of a Pi Pico, and has been paired with an over-sized 3D printed knob that really makes this build stand out — not only visually, but in terms of usability. These cyberdeck builds often rely on touch screens for input, but we always appreciate a physical interface.

Under the hood you’ve got a Raspberry Pi Zero and an 18650 cell to keep the whole thing running while on the go. Though the Zero is certainly showing its age compared to the more modern variants of the Pi, for a device like this, raw computing power isn’t really the driving concern. A mechanical keyboard usually rounds out these cyberdeck builds, but in this case, [Tommi] went with a fairly common Rii 518BT portable board that’s been skillfully integrated into the front of the Cyberdore.

All of the STL files necessary to print out your own Cyberdore 2064 are available on Printables, and while [Tommi] didn’t exactly provide build instructions, the write-up provides plenty of information to get you started.

So is it just us, or does looking at Cyberdore 2064 make you think it’s time for another Hackaday Cyberdeck Challenge?