Tag: electronics

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Ancient Web: Industrial Alchemy Built a Technology Museum Out of the Parts Bin

Industrial Alchemy is what happens when the junk drawer wins and gets a museum.

Visit Industrial Alchemy

The site went online in 2006 and has now crossed the funny threshold where a website about vintage technology is itself vintage technology. It is still being updated.

Its Technology Museum is organized by component type rather than by famous product. That creates categories normal museums rarely bother with: Geissler tubes, Nixie displays, Dekatrons, Numitrons, magic-eye tubes, magnetrons, klystrons, photomultipliers, CRTs, VFDs, early semiconductor devices, calculators, and assorted instrumentation.

The archive is strongest when the hardware is obscure enough that a model number would otherwise lead nowhere.

Components deserve histories too

A computer museum might preserve a complete machine. Industrial Alchemy preserves the things inside machines and the strange devices between categories.

Recent additions have included an early Western Electric point-contact transistor, unusual LED modules, a Sharp PC-1500 pocket computer, obscure Nixie tubes, and an enormous hybrid countermeasures processor used in the U.S. Army’s Cobra helicopter. That last module contains a forest of bond wires and dozens of semiconductor dies inside a hermetic metal package.

The site provides photographs, descriptions, and datasheets when available.

That sounds simple until you need to identify an unlabeled display module pulled from old equipment.

Component history is difficult because parts were designed to disappear into products. When the product dies, the individual tube or IC often becomes an anonymous object in a bin. A hand-built catalog can preserve the visual cues, packaging, manufacturer, and application long after the original sales literature vanishes.

The site also maintains the personality of the older technical web. Its updates discuss Hamvention flea-market booths, weird acquisitions, and the pleasure of finding obsolete hardware that absolutely nobody needed to save.

That is very much CacheRat territory. The 1,967 Ancient Web Domains list was built to locate exactly these deep specialist archives before search reduces them to a forgotten result on page twelve.

There are museums for computers.

Industrial Alchemy remembers the glowing orange thing that made one number appear inside them.

Return to Industrial Alchemy

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Ancient Web: The Homebrew CPU Ring Still Links Computers Built From the Wrong End

Most computer projects begin by choosing a processor. The Homebrew CPU Ring begins by rejecting that shortcut.

Visit the Homebrew Computers Website

The rule is simple: a project belongs if the CPU itself was built rather than purchased as an off-the-shelf processor. It can imitate a commercial architecture, but the actual logic has to exist in real hardware. Simulations and paper designs do not qualify.

That leaves a wonderfully broad definition of “computer.”

The current index links machines built from TTL logic, relays, FPGA hardware, discrete components, and stranger approaches. Project names include Magic-1, Megaprocessor, TTLCPU, Pineapple One, Relay Computer, Home-Built TTL Computer, Gigatron, and many more.

The webring idea still makes sense here

This is one of the rare places where the old webring concept was almost perfect for the subject.

Each builder solved similar problems differently: instruction decoding, registers, clocks, arithmetic, memory interfaces, control logic, front panels, debugging, and physical construction. Following one machine naturally makes you curious about the next.

The site’s admission language even keeps some of the old-web personality: real hardware counts; simulations “don’t cut it :-).” The page also reminds visitors that the ring only links projects and that the intellectual property belongs to the individual builders.

That distinction matters because the value is distributed. There is no single canonical homebrew CPU. The archive is useful precisely because one person used relays, another built a bit-slice design, another recreated an 8080, and somebody else decided that a suitcase was a reasonable computer enclosure.

For students of digital logic, these projects expose processor architecture at a scale hidden by modern chips. A commercial CPU turns billions of transistors into a black package. A homebrew CPU turns the same ideas back into visible boards, wires, gates, lamps, and mistakes.

CacheRat found the ring while working through its broader 1,967-domain Ancient Web research list. Sites like this are why that list is more useful as a map than as a nostalgia dump.

You can learn a lot about CPUs by building one badly enough to see every part.

Return to the Homebrew CPU Ring

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Ancient Web: Vintage Technics Catalogs the Audio Hardware Normal Museums Ignore

Vintage-Technics.ru has the cataloguing instincts of somebody who sees a forgotten dictation recorder and thinks, correctly, that the Internet needs six photographs of it.

Visit Vintage Technics

Despite the name, the site ranges far beyond Technics-branded stereo gear.

Its pages document tape recorders, dictation machines, microphones, portable radios, televisions, video hardware, accessories, batteries, cassettes, wire recorders, test equipment and other electronic debris from the twentieth century. The index moves comfortably between familiar names such as Sony, Panasonic, Philips and Grundig and obscure Soviet, Eastern European and short-lived Western equipment.

That mixture makes it useful.

The stuff between famous products

Technology history usually remembers flagship devices.

Collectors end up preserving everything around them.

Vintage Technics includes Minifon wire recorders, Mohawk Midgetape machines, Grundig Stenorette dictation systems, tiny portable recorders, Soviet Electronica equipment, flight recorders, old Watchman televisions, unusual cassette formats and accessories that often survive without documentation.

Individual pages frequently photograph details that matter to restorers: connectors, battery arrangements, tape dimensions, switches, cases and internal mechanisms. One accessories section compares obsolete recording media such as Steno-Cassettes, Elcaset and proprietary miniature reels.

The English translation is imperfect and the site now carries intrusive promotional material in places. Neither erases the underlying archive.

In fact, the roughness reinforces why pages like this matter. A polished museum rarely devotes space to a microphone that only fits one 1960s dictation machine. A collector site will.

For people identifying unknown hardware, repairing inherited electronics, researching recording formats or simply tracing how portable audio shrank over time, those photographs and model numbers are the useful layer.

This site was found in CacheRat’s broader Ancient Web research corpus.

Explore the 1,967 Ancient Web Domains research list

Vintage Technics preserves the non-famous machines—the recorders, batteries, adapters and oddball formats that make the history of electronics look like an ecosystem instead of a product-launch timeline.

Return to Vintage Technics

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Ancient Web: Mike’s Digital Clocks Are What Happens When Timekeeping Gets Out of Hand

A clock needs to tell you the time. Mike Harrison’s clock page demonstrates how quickly that requirement can deteriorate into 200-volt Nixie supplies, giant electroluminescent digits, custom PCBs, reed switches, and a display bright enough to light the room at night.

Visit Mike’s Digital Clocks

The page is part of Mike’s Electric Stuff, and it reads like a notebook from decades of electronic tinkering. The oldest clock shown dates to around 1982 and uses ordinary red LEDs with an MM5387 clock chip. From there things get progressively less reasonable.

There is a huge Nixie clock built with East German Z568M tubes, a Burroughs B7971 alphanumeric display, a tiny Nixie car clock built from three stacked PCBs, light-guide filament displays, a 4.5-inch electroluminescent clock, dot-matrix clocks, and commercial countdown displays.

The construction notes are the archive

The value is not just photographs of glowing numbers. Mike documents the actual engineering decisions.

One clock uses a PIC16C84 with cascaded 74HC595 shift registers and high-voltage driver transistors. Another uses 200-volt AC for electroluminescent strips. The tiny car clock has a switch-mode supply generating roughly 200 volts for miniature Nixie tubes. Time-setting buttons are sometimes replaced with magnetic reed switches because visible switches would spoil the case.

There are also wonderfully specific historical details. A giant countdown display was built for the UK iPhone launch. Another Nixie display was made for a Channel 4 television production. One early PCB was etched using a drip tray from Mike’s mother’s refrigerator.

That is the sort of sentence no content strategy meeting ever produces.

For people building clocks now, the page still provides ideas about display technology, packaging, high-voltage drivers, and the visual character of obsolete components. For everybody else, it documents what hobby electronics looked like before every project began with an ESP32 and a GitHub library.

This was pulled from CacheRat’s larger Ancient Web research corpus.

Browse the 1,967 Ancient Web Domains research list

The page is still worth visiting just to see how many different ways one person found to display four digits.

Return to Mike’s Digital Clocks

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Ancient Web: Captured Lightning Has Been Wreaking Havoc With Electrons Since 1999

There are hobby sites, and then there are hobby sites where the safety equipment includes a blast shield because the coil around the quarter is expected to explode. Captured Lightning has been that kind of website since 1999.

Visit Captured Lightning

Bert Hickman’s Stoneridge Engineering site is a sprawling archive of high-voltage experiments, Tesla coils, Lichtenberg figures, technical books, giant electrical arcs and electromagnetically shrunken coins. The site’s own slogan is “Wreaking Havoc with Electrons,” which is difficult to improve upon.

Hickman says he caught the Tesla-coil bug in 1995 after finding a Tesla-coiling area on a bulletin-board system. He was already trained as an electrical engineer, and after retiring in 2002 he devoted more time to Tesla coils, pulsed-power experiments and the branching electrical patterns known as Lichtenberg figures.

Making small change, very quickly

The Quarter Shrinker may be the site’s finest example of engineering performed partly because the result is funny. The machine uses high-velocity electromagnetic forming: a capacitor bank dumps a huge amount of energy through a coil surrounding a coin. The rapidly changing magnetic field forces the metal inward.

The site says a US quarter can be reduced to about the diameter of a dime at roughly 5,000 joules. The disposable work coil disintegrates during the event, producing exactly the sort of laboratory scene that explains why the site repeatedly tells visitors not to try this casually at home.

There are technical explanations, historical notes, galleries and even a reconstruction of how coin shrinking developed among experimenters.

Elsewhere, Hickman documents a 10-inch Tesla coil capable of long streamers, high-voltage arc photographs and acrylic Lichtenberg sculptures created by electrical discharges. The result is half engineering notebook, half museum and half mad-scientist gift shop. Yes, that is three halves. High voltage does things to the accounting.

A BBS hobby that became a permanent reference

This is exactly what the independent Web does well: one person’s unusual technical interest accumulates explanations, photographs, failure stories and specialist history until the site becomes difficult to replace. Captured Lightning was still receiving updates decades after it began.

It is one of the stranger engineering stops in CacheRat’s 1,967 Ancient Web Domains research list, which is full of projects that survived because somebody kept caring after normal people would have moved on.

Do not build the Quarter Shrinker because an article on the Internet made it sound fun. It is fun. That is not the same thing.

Explore Captured Lightning and the Nikola Tesla Information Center

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Ancient Web: ZeptoBars Opens the Black Box of Microchips

Most integrated circuits are designed to be visually boring. Black package. Tiny markings. Pins. ZeptoBars removes the package and shows the microscopic city that was hiding inside.

Visit ZeptoBars

One of the site’s defining early articles, published in 2012, explains the process of decapsulating packaged chips so the silicon die can be inspected and photographed. The original article is explicit that the laboratory chemicals involved are extremely dangerous and not something untrained readers should reproduce.

The useful result is the photography.

Under magnification, an anonymous regulator, logic chip or processor becomes bond wires, metal layers, repeated transistor structures, memory arrays, analog geometry, logos and tiny bits of layout humor left by engineers.

A continuing archive of actual silicon

ZeptoBars did not stop at a handful of novelty photographs.

The archive runs for dozens of pages and continues receiving new die shots in 2026. Recent entries identify exact parts, manufacturers and die dimensions. The project has also moved into scanning electron microscopy; a 2026 post documents the acquisition of a dual-beam FEI Versa 3D system capable of extremely high-resolution imaging.

That gives the archive several audiences at once.

Electronics people can compare internal construction. Semiconductor historians can see how different manufacturers solved similar problems. Counterfeit hunters can compare suspicious parts with known dies. Designers working with open silicon can compare physical manufacturing results against layout data.

And the rest of us can stare at a logic chip until it starts looking like a city photographed from orbit.

Documentation below the package label

A normal component database stops at the part number, package, pinout and datasheet. ZeptoBars adds another layer: what was physically fabricated.

That distinction matters because chips with similar external labels can contain different revisions, dies or manufacturing processes. Sometimes the silicon tells a better story than the plastic.

For webmasters, ZeptoBars is also a good model of how a specialist archive compounds over time. Every photographed part becomes another highly specific search destination.

We found it while digging through CacheRat’s larger Ancient Web site corpus.

Explore the 1,967 Ancient Web Domains research list

The site is still active, so this is less a museum with the lights off and more a laboratory that happens to have been accumulating exhibits for years.

Explore the ZeptoBars chip archive

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Ancient Web: Somebody Built a Giant 6502

The MOS 6502 is famous for fitting into some of the most important home computers and game systems ever made. The MOnSter 6502 project decided the obvious response was to make it enormous again.

Visit the MOnSter 6502 project

The site calls it a “dis-integrated circuit”: a complete working transistor-scale replica of the classic processor built from discrete components instead of hidden inside a tiny silicon package.

The board measures about 12 by 15 inches and contains 4,769 components. The transistors and LEDs make the internal activity visible in a way the original chip never could.

That is both ridiculous and genuinely useful.

A processor you can look at

The original 6502 family sat at the center of machines including the Apple II, Commodore PET, Atari 400 and 800, BBC Micro and many other systems. Related versions appeared in the Commodore 64, Atari 2600 and Nintendo Entertainment System.

Normally, all of the interesting switching happens invisibly inside the package. You can study a schematic or look at a microscope photograph of the die, but the processor remains abstract.

MOnSter 6502 takes the opposite approach. Its oversized implementation exposes the logic as physical parts spread across a board. LEDs make signals and state changes visible. The CPU becomes something closer to a working wall diagram.

The project site includes technical explanations, photographs, video and an FAQ that starts with the reasonable question: “Sixty-Five-Oh-What?”

This is what hobby websites are for

No normal product roadmap leads to a giant discrete 6502. It exists because somebody thought the idea was worth building.

That is one of the things the older independent Web was especially good at documenting. A person builds an unnecessarily large processor, creates a site explaining what it is, and now years later anybody interested in CPU design can wander in and see the result.

It contributes education, preservation, hardware art and a very strong answer to the question “but can you make the chip bigger?”

MOnSter 6502 is one of 1,967 sites in CacheRat’s larger Ancient Web research list.

Explore the 1,967 Ancient Web Domains research list

The integrated circuit won because making every transistor this large is a terrible manufacturing strategy. As a way to understand one, though, it is excellent.

Explore the MOnSter 6502

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Ancient Web: Phil’s Old Radios Has Been Online Since 1995

Phil’s Old Radios says it launched in 1995, which means the website itself is now old enough to qualify for the sort of careful restoration work it documents.

Visit Phil’s Old Radios

Philip I. Nelson built the site around antique radios, televisions, and the work required to bring old sets back to life. It includes a large gallery, restoration articles, beginner material, book and magazine recommendations, parts sources, and special features about radio collecting.

The useful part is that the site does not merely show polished pictures of finished hardware.

It explains the work.

Repair knowledge that survives with the machines

Old electronics are a problem for preservation because keeping the physical object is only half the job. Capacitors fail. Insulation deteriorates. Tubes become harder to source. Previous owners make repairs ranging from clever to criminal.

A restoration article captures decisions that a photograph cannot.

That gives Phil’s Old Radios value beyond nostalgia. Somebody approaching an unfamiliar set can learn what to inspect, where to find parts, and what other collectors have already discovered. The beginner section even covers basics such as finding, pricing, testing, and repairing vintage sets.

The website is also a useful example for modern webmasters. Its information architecture is obvious from the front page: Gallery, Beginners, Information, Restoration, Features, Building, Sitemap, Contact, About, News.

No archaeological excavation of the navigation is required before beginning the archaeological excavation of the radios.

The homepage identifies the site as one of the earliest websites devoted to antique radios and TVs and carries a copyright range beginning in 1995. Three decades later, the basic purpose has not changed much. It exists to document a subject and help people who care about it.

That kind of continuity is part of what Ancient Web is looking for.

Phil’s Old Radios is one of the sites pulled from CacheRat’s larger collection of 1,967 classic and independent Web domains assembled for researchers, webmasters, preservation work, and general digging.

Explore the 1,967 Ancient Web Domains research list

If an old chassis full of dust and questionable capacitors sounds like a reasonable afternoon, the restoration section can consume one quickly.

Explore Phil’s Old Radios