Time, Stars, and Tides, All On Your Wrist
https://hackaday.com/2025/07/18/time-stars-and-tides-all-on-your-wrist/
https://hackaday.com/2025/07/18/time-stars-and-tides-all-on-your-wrist/
Hackaday
Time, Stars, And Tides, All On Your Wrist
When asked ‘what makes you tick?’ the engineers at Vacheron Constantin sure know what to answer – and fast, too. Less than a year after last year’s horological kettlebell, the 960…
PVCSub: A Submarine from the Plumbing Aisle
https://hackaday.com/2025/07/18/pvcsub-a-submarine-from-the-plumbing-aisle/
https://hackaday.com/2025/07/18/pvcsub-a-submarine-from-the-plumbing-aisle/
Hackaday
PVCSub: A Submarine From The Plumbing Aisle
Today in the submersibles department our hacker [Rupin Chheda] wrote in to tell us about their submarine project. This sub is made from a few lengths of PVC piping of various diameters. There is an…
Before Macintosh: The Story of the Apple Lisa
https://hackaday.com/2025/07/18/before-macintosh-the-story-of-the-apple-lisa/
https://hackaday.com/2025/07/18/before-macintosh-the-story-of-the-apple-lisa/
Hackaday
Before Macintosh: The Story Of The Apple Lisa
Film maker [David Greelish] wrote in to let us know about his recent documentary: Before Macintosh: The Apple Lisa. The documentary covers the life of the Apple Lisa. It starts with the genesis of …
2025 One-Hertz Challenge: ZX Spectrum Is Now A Z80 Frequency Counter
https://hackaday.com/2025/07/18/2025-one-hertz-challenge-zx-spectrum-is-now-a-z80-frequency-counter/
https://hackaday.com/2025/07/18/2025-one-hertz-challenge-zx-spectrum-is-now-a-z80-frequency-counter/
Hackaday
2025 One-Hertz Challenge: ZX Spectrum Is Now A Z80 Frequency Counter
The ZX Spectrum is perhaps most fondly remembered as a home computer and a games machine. [Tito] has grabbed the faithful black plastic box and turned it into a frequency counter as an innovative e…
GarageMinder: Automatic Garage Door
https://hackaday.com/2025/07/19/garageminder-automatic-garage-door/
https://hackaday.com/2025/07/19/garageminder-automatic-garage-door/
Hackaday
GarageMinder: Automatic Garage Door
After getting a new car, [Solo Pilot] missed the automatic garage door opening and closing system their old car had. So they set about building their own, called GarageMinder. On the project page y…
Neon Lamp Detects Lightning Strikes
https://hackaday.com/2025/07/19/neon-lamp-detects-lightning-strikes/
https://hackaday.com/2025/07/19/neon-lamp-detects-lightning-strikes/
Hackaday
Neon Lamp Detects Lightning Strikes
For as mysterious, fascinating, and beautiful as lightning is at a distance, it’s not exactly a peaceful phenomenon up close. Not many things are built to withstand millions of volts and tens…
Elegoo Rapid PETG vs PETG Pro: Same Price, Similar Specs, Which to Buy?
https://hackaday.com/2025/07/19/elegoo-rapid-petg-vs-petg-pro-same-price-similar-specs-which-to-buy/
https://hackaday.com/2025/07/19/elegoo-rapid-petg-vs-petg-pro-same-price-similar-specs-which-to-buy/
Hackaday
Elegoo Rapid PETG Vs PETG Pro: Same Price, Similar Specs, Which To Buy?
Even within a single type of FDM filament there is an overwhelming amount of choice. Take for example Elegoo’s PETG filament offerings, which include such varieties like ‘Pro’ and…
Punch card controlled Cyberdeck Lives In 80s Toy
https://hackaday.com/2025/07/19/punch-card-controlled-cyberdeck-lives-in-80s-toy/
https://hackaday.com/2025/07/19/punch-card-controlled-cyberdeck-lives-in-80s-toy/
Hackaday
Punch Card Controlled Cyberdeck Lives In 80s Toy
Have you ever seen a toy and said “That wants to be a deck”? [Attoparsec] did, when his eyes fell upon the Little Talking Scholar, a punch card driven toy from the 1980s. It’s now…
PicoGUS adds CD-ROM Emulation to ISA Bus
https://hackaday.com/2025/07/19/picogus-adds-cd-rom-emulation-to-isa-bus/
https://hackaday.com/2025/07/19/picogus-adds-cd-rom-emulation-to-isa-bus/
Hackaday
PicoGUS Adds CD-ROM Emulation To ISA Bus
Everything fails eventually, but moving parts fail fastest of all– and optical drives seemingly more than others, at least in our experience. Even when they work, vintage drives often have tr…
SymbOS Is a Funhouse mirror look at a future that never was
https://hackaday.com/2025/07/19/symbos-is-a-funhouse-mirror-look-at-a-future-that-never-was/
https://hackaday.com/2025/07/19/symbos-is-a-funhouse-mirror-look-at-a-future-that-never-was/
Hackaday
SymbOS Is A Funhouse Mirror Look At A Future That Never Was
The Z80 might be decades obsolete and a few years out of production, but it’s absolutely a case of “gone but not forgotten” in the hacker world. Case in point is SymbOS, a multita…
Software Defined Retro ROMs
https://hackaday.com/2025/07/19/software-defined-retro-roms/
https://hackaday.com/2025/07/19/software-defined-retro-roms/
Hackaday
Software Defined Retro ROMs
Here’s something fun from our hacker [Piers]: Software Defined ROMs. In this series of three videos, [Piers] runs us through what a software defined ROM is, how to make them, and then how to …
A Spectrophotometer Jailbreak to Resolve Colorful Disputes
https://hackaday.com/2025/07/19/a-spectrophotometer-jailbreak-to-resolve-colorful-disputes/
https://hackaday.com/2025/07/19/a-spectrophotometer-jailbreak-to-resolve-colorful-disputes/
Hackaday
A Spectrophotometer Jailbreak To Resolve Colorful Disputes
The human eye’s color perception is notoriously variable (see, for example, the famous dress), which makes it difficult to standardize colours. This is where spectrophotometers come in: they measur…
Project Scribe: Receipts for Life
https://hackaday.com/2025/07/20/project-scribe-receipts-for-life/
https://hackaday.com/2025/07/20/project-scribe-receipts-for-life/
Hackaday
Project Scribe: Receipts For Life
Here’s a fun project. Over on their YouTube page [Urban Circles] introduces Project Scribe. The idea behind this project is that you can print out little life “receipts”. Notes, j…
Engine Data Displayed Live On Dash
https://hackaday.com/2025/07/20/engine-data-displayed-live-on-dash/
https://hackaday.com/2025/07/20/engine-data-displayed-live-on-dash/
Hackaday
Engine Data Displayed Live On Dash
In the auto world, there are lots of overarching standards that all automakers comply with. There are also lots of proprietary technologies that each automaker creates and uses for its own benefit.…
8 Bit Mechanical Computer Built from Knex
https://hackaday.com/2025/07/20/8-bit-mechanical-computer-built-from-knex/
https://hackaday.com/2025/07/20/8-bit-mechanical-computer-built-from-knex/
Hackaday
8 Bit Mechanical Computer Built From Knex
Long before electricity was a common household utility, humanity had been building machines to do many tasks that we’d now just strap a motor or set of batteries onto and think nothing of it.…
When a Record Player Doesn’t Work Due to Solid State Grease
https://hackaday.com/2025/07/20/when-a-record-player-doesnt-work-due-to-solid-state-grease/
https://hackaday.com/2025/07/20/when-a-record-player-doesnt-work-due-to-solid-state-grease/
Hackaday
When A Record Player Doesn’t Work Due To Solid State Grease
Normally, mechanical devices like record players move smoothly, with well-greased contact surfaces enabling the tone arm to automatically move, the multi-record mechanism to drop down a fresh disc,…
Designing an Open Source Multimeter: the HydraMeter
https://hackaday.com/2025/07/20/designing-an-open-source-multimeter-the-hydrameter/
https://hackaday.com/2025/07/20/designing-an-open-source-multimeter-the-hydrameter/
Hackaday
Designing An Open Source Multimeter: The HydraMeter
Our hacker [John Duffy] wrote in to let us know about a video he put together to explain the design of his open-source multimeter, the HydraMeter. If you’re interested in how the circuitry fo…
Hackaday Links: July 20, 2025
https://hackaday.com/2025/07/20/hackaday-links-july-20-2025/
https://hackaday.com/2025/07/20/hackaday-links-july-20-2025/
Hackaday
Hackaday Links: July 20, 2025
In the relatively short time that the James Webb Space Telescope has been operational, there’s seemingly no end to its list of accomplishments. And if you’re like us, you were sure that…
Remembering Chiptunes, the Demoscene and the Illegal Music of Keygens
https://hackaday.com/2025/07/20/remembering-chiptunes-the-demoscene-and-the-illegal-music-of-keygens/
https://hackaday.com/2025/07/20/remembering-chiptunes-the-demoscene-and-the-illegal-music-of-keygens/
Hackaday
Remembering Chiptunes, The Demoscene And The Illegal Music Of Keygens
We loved keygens back in the day. Our lawyers advise us to clarify that it’s because of the demo-scene style music embedded in them, not because we used them for piracy. [Patch] must feel the…
Researching Glow-Powder Left a few Scars
https://hackaday.com/2025/07/20/researching-glow-powder-left-a-few-scars/
https://hackaday.com/2025/07/20/researching-glow-powder-left-a-few-scars/
Hackaday
Researching Glow-Powder Left A Few Scars
Content warning: Human alteration and scalpels. General warning: We are not speaking as doctors. Or lawyers. If you watch sci-fi, you probably do not have to think hard to conjure a scene in a tren…