The Heinz Nixdorf Museumsforum building in Paderborn

Visit The World’s Largest Computer Museum: The Heinz Nixdorf

Most stories in the history of computing took place in one of a small number of places. The wartime code-breaking effort in Bletchley Park led to Colossus, the first programmable electronic computer. Various university campuses in Britain and the US were home to first-generation computers like ENIAC, EDVAC and the Manchester Baby in the late 1940s. Silicon Valley then stole the limelight with the home computer revolution in the 1970s. Naturally, all of these places have their museums celebrating their local achievements, but the world’s largest computer museum is not found in Silicon Valley or on the campus of a famous university. Instead, you have to travel to a small German town called Paderborn, which houses the Heinz Nixdorf Museumsforum, or HNF.

Heinz Nixdorf might not be a household name in America like Jack Tramiel or Steve Jobs, but he was one of Europe’s great computer pioneers. Starting with vacuum tube based machines in 1952, Nixdorf gradually expanded his company into one of the largest computer manufacturers of the 1970s. His products were especially popular among large businesses in the financial sector, such as banks and insurance companies. By the late 1980s however, sales went downhill and the company was eventually acquired by Siemens. Today, the Nixdorf name lives on as part of Diebold-Nixdorf, a major producer of ATMs and checkout machines, reflecting the original company’s focus on the financial industry.

The museum’s roots lie in Heinz Nixdorf’s personal collection of typewriters and other office equipment. Although he already envisioned starting a museum dedicated to computing, his sudden death in 1986 put a stop to that. A few of his employees kept the plan alive however, and in 1996 the HNF was opened in Paderborn. Today the museum is run by a non-profit foundation that aims to provide education in information and communication technology to a wide audience.

The collection is housed in the former worldwide headquarters of Nixdorf Computer AG, a rather imposing 1970s office building covered in gold-tinted windows. Inside,]] you’re reminded of its former life as an office building through its compact layout and low ceilings. It does give the museum a bit of a cosy feel, unlike, say, the cavernous halls of London’s Science Museum, but don’t let this fool you: at 6,000 m2, the main exhibition area is about twice as large as that of Silicon Valley’s Computer History Museum. Continue reading “Visit The World’s Largest Computer Museum: The Heinz Nixdorf”

A miniature Vectrex console being used

Finally, The Venerable Vectrex Gets A Mini Makeover

It appears that every great console is bound to get a miniature remake: we’ve had the PlayStation Classic, the Mini NES and SNES, and even a miniature Sega Genesis/Mega Drive. But one great console that was sorely missing from that list, at least according to [Brendan], was the Vectrex. So he went ahead and built a fully-functioning miniature Vectrex Console.

If the name “Vectrex” doesn’t ring a bell in your mind, you’re not alone: a commercial failure, it was quickly forgotten by most following the 1983 video game crash. But it has retained a cult status among enthusiasts due to its unique design featuring a monochrome vector monitor, onto which you can place transparent overlays to obtain a sort-of color display. Its games can now all be emulated using software like RetroPie, which is what [Brendan] chose to run on a Raspberry Pi Model 2 that he had lying around.

As for the display, he settled on a Pi-compatible 3.5″ TFT device. Hooking it up to the Pi was easy enough, but getting the image rendered in its proper portrait orientation was quite a headache, requiring endless fiddling with drivers and configuration files.

Once he got this working, [Brendan] set to work designing a miniature copy of the Vectrex’s original case. It took a few iterations and several 10-hour runs on his 3D printer before he ended up with a sturdy case that securely held the Pi and its display in place. A few more hours of printing later he also had a handheld controller, which he based on an Arduino Pro Mega. The Arduino reads out four regular pushbuttons and a joystick, and communicates with the Pi through a coiled USB cable.

The end result, as you can see in the video embedded below, is the cutest little Vectrex we’ve ever seen. It’s really the opposite of this big-screen Vectrex project. We’ve also seen a Vectrex projector, and even one with a real color monitor hacked in. Continue reading “Finally, The Venerable Vectrex Gets A Mini Makeover”

A 3D-printed Portal Turret

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

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”

A Timex Datalink smartwatch next to an Arduino

Arduino Keeps Your Classic Timex Datalink In Sync

The Timex Datalink was arguably the first usable smartwatch, and was worn by NASA astronauts as well as geek icons like Bill Gates. It could store alarms, reminders and phone numbers, and of course tell the time across a few dozen time zones. One of the Datalink’s main innovations was its ability to download information from your PC — either through flashing images on a CRT monitor or through a special adapter plugged into a serial port.

With CRTs thin on the ground and original serial adapters fetching ludicrous prices online, classic Datalink users today may find it hard to keep their watches in sync with their Outlook calendars. Fortunately for them, [famiclone] came up with a solution: a DIY Datalink adapter based on an Arduino. It works the same way as Timex’s serial adapter, in that it receives data through the computer’s serial port and transmits it to the watch by flashing a red LED.

Updating your watch does require the use of the original Datalink PC software, which only runs on classic operating systems like Windows 95 or 98, so you’ll need to keep a copy of such an OS running. Luckily, it has no problem with virtual machines or USB COM ports, so at least you don’t need to keep vintage PC hardware around. Then again, whipping out a 1995 Pentium laptop to update your Timex watch would make for the ultimate geek party piece.

Love classic geeky watches? Check out this featured article we did on them a few years ago. If you’re interested in using computer monitors to transmit data optically, we’ve covered a few projects that do just that.

A Z80 CPU board built on a piece of prototype board with an edge connector

Designed From Scratch And Fully Handmade: The Modular Coleman Z80 Computer

While the phrase “I built my own computer” might sound impressive to the uninitiated, anyone with an interest in modern computer hardware knows that there’s really not much to it: buy a case, a motherboard with a CPU, some RAM and peripherals, and you’re pretty much there. What’s way more impressive is designing a complete computer system from the ground up, as [Joshua Coleman] just did when he built the Coleman Z80.

And when we say “from the ground up”, we mean it: everything down to the system bus was hand-drawn by [Joshua] himself. It does share something with modern PCs though: a strictly modular design. There’s a Z80 CPU board, a ROM and RAM board, and even two modules that you could describe as a video card and a sound card. All of these are built on prototyping boards with a 40-pin edge connector and hooked up to a single backplane carrying the main system bus.

Designed as an experimentation platform, the Coleman Z80 has many features that enable testing and debugging, such as an adjustable clock generator and a few beautiful vintage LED displays that show the status of the main bus. Input and output are mainly through a serial link and a 16×2 LCD, but [Joshua] is already planning a keyboard interface and composite video output to give it that proper 1980s home computer vibe. The software is currently limited to a ROM monitor that enables basic I/O commands, but with 256 KB of RAM there’s plenty of potential for writing useful software.

Just as impressive as the design itself is the fact that this was [Joshua]’s first electronic design project; we’ve certainly seen worse first projects! Over the years we’ve featured several cool homebrew Z80 computers, such as a super-minimalistic board, a modular system based on the powerful eZ80, and this cute little one that fits inside an Altoids tin.

Continue reading “Designed From Scratch And Fully Handmade: The Modular Coleman Z80 Computer”

A desktop LED implementation of the arcade game Cyclone

Going Around In Circles With Homemade Arcade Classic Cyclone

The classic arcade game Cyclone has attracted many players, along with their coins, thanks to its simple yet addictive gameplay. In its most basic form it consists of a light racing around a circular track, which the player then has to stop at exactly the right place. Arduino enthusiast [mircemk] made a home version of this game, which allows addicts to keep playing forever without running out of quarters.

Instead of an arcade cabinet, this smaller version has an upright 3D-printed ring that holds 60 WS2812 LEDs. A further six in the center of the ring act as a score counter. An Arduino in the base drives the LEDs and runs the game, which is based on an earlier iteration built by [oKeeg]. An interesting addition is a large homemade “arcade button”, which is large and sturdy enough to withstand any abuse inflicted on it by a frustrated player.

Retro-style sound effects and flashing light sequences give the game a bit of an arcade vibe, even without a big cabinet and piles of coins. Simple LED games like this are always great eye-catchers in any home or office; if you like this one, be sure to check out other LED games like the handheld LEDBOY, the one-dimensional dungeon crawler TWANG, and this LED racing game. Continue reading “Going Around In Circles With Homemade Arcade Classic Cyclone

A styrofoam head wearing an electronic headband with cat ears

These Mind-Controlled Cat Ears Move With Your Mood

As any cat owner will tell you, a cat’s ears are great indicators of its state of mind: pointed forward if they want your attention, turned backwards if they’re angry, and folded down flat when they’re afraid. Humans sometimes don cat ear headbands as a fashion statement, but sitting motionless those ears are more likely to confuse a cat than to provide any meaningful communication.

[Jazz DiMauro] aims to fill that gap by designing a cat ear headband that actually responds to your emotions. It does so by continuously taking an EEG measurement and extracting the “attention” and “meditation” variables from it. Those values are then applied to a set of servos that allow two-axis motion on each 3D printed ear. The EEG readout device is an off-the-shelf MindWave headset, which outputs its sensor data through Bluetooth. An Arduino then reads out the data and drives the servos.

Turning all this into a usable wearable device was a project on its own: [Jazz] went through several iterations to find a suitable power source and wiring strategy until they settled on a pair of lithium-polymer batteries and a single flat cable. The end result looks comfortable enough to wear, and the ears’ motion looks smooth and natural. All that’s left is to test it with real cats, to find out if they can now finally understand their human’s emotions too.

We’ve featured a few moving cat ear headbands before: one that moves along with your head’s motions, and another one with manual control. Today’s EEG-powered one shows yet another application for EEGs, which have been used for anything from invoking lucid dreaming to playing beer pong. Continue reading “These Mind-Controlled Cat Ears Move With Your Mood”