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Hackaday @hackaday-feed.bsky.social · 1h

Inside a Germanium Transistor

Inside a Germanium Transistor

The first transistors were point contact devices, not far from the cats-whiskers of early radio receivers. They were fragile and expensive, and their performance was not very high. The transistor …read more

Hackaday @hackaday-feed.bsky.social · 4h

One ROM Gets a USB Stack

One ROM Gets a USB Stack

Our hacker [Piers Finlayson] is at it again, and this time he has added USB support to One ROM. With this new connectivity you can attach your One ROM to …read more

Hackaday @hackaday-feed.bsky.social · 6h

The Fascinating Waveguide Technology Inside Meta’s Ray-Ban Display Glasses

The Fascinating Waveguide Technology Inside Meta’s Ray-Ban Display Glasses

Recently the avid teardown folk over at iFixit got their paws on Meta’s Ray-Ban Display glasses, for a literal in-depth look at these smart glasses. Along the way they came …read more

Hackaday @hackaday-feed.bsky.social · 10h

Motors Make the Best Knobs With SimpleFOC

Motors Make the Best Knobs With SimpleFOC

The worst thing about a volume knob is that, having connected it to a computer, it might be wrong: if you’ve manually altered the volume settings somewhere else, the knob’s …read more

Hackaday @hackaday-feed.bsky.social · 13h

2025 Component Abuse Challenge: The Sweet Sound of a Choking Transformer

2025 Component Abuse Challenge: The Sweet Sound of a Choking Transformer

The Component Abuse Challenge is dragging all sorts of old, half-forgotten hacks out of the woodwork, but this has got to be the most vintage: [KenS] started using a transformer …read more

Hackaday @hackaday-feed.bsky.social · 16h

2025 Component Abuse Challenge: Load Cell Anemometer

2025 Component Abuse Challenge: Load Cell Anemometer

When you think anemometer, you probably don’t think “load cell” — but (statistically speaking) you probably don’t live in Hurricane Country, which is hard on wind-speed-measuring-whirligigs. When [BLANCHARD Jordan] got …read more

Hackaday @hackaday-feed.bsky.social · 22h

Google Japan Turn Out Another Keyboard, and it’s a Dial

Google Japan Turn Out Another Keyboard, and it’s a Dial

There’s a joke that does the rounds, about a teenager being given a dial phone and being unable to make head nor tail of it. Whether or not it’s true, …read more

Hackaday @hackaday-feed.bsky.social · 1d

Billy Bass Gets New Job as a Voice Assistant

Billy Bass Gets New Job as a Voice Assistant

For those who were alive and conscious before the modern Internet, there were in fact things that went “viral” and became cultural phenomenon for one reason or another. Although they …read more

Hackaday @hackaday-feed.bsky.social · 1d

Why Stepper Motors Still Dominate 3D Printing

Why Stepper Motors Still Dominate 3D Printing

It’s little secret that stepper motors are everywhere in FDM 3D printers, but there’s no real reason why you cannot take another type of DC motor like a brushless DC …read more

Hackaday @hackaday-feed.bsky.social · 1d

Where is Mathematics Going? Large Language Models and Lean Proof Assistant

Where is Mathematics Going? Large Language Models and Lean Proof Assistant

If you’re a hacker you may well have a passing interest in math, and if you have an interest in math you might like to hear about the direction of …read more

Hackaday @hackaday-feed.bsky.social · 1d

Honoring the Legacy of Robert Murray-Smith

Honoring the Legacy of Robert Murray-Smith

We at Hackaday are deeply saddened to learn of the passing of Robert Murray-Smith. The prolific experimenter had spent over a decade on YouTube, creating more than 2,500 videos where …read more

Hackaday @hackaday-feed.bsky.social · 1d

FLOSS Weekly Episode 850: One ROM to Rule Them All

FLOSS Weekly Episode 850: One ROM to Rule Them All

This week Jonathan and Aaron chat with Piers Finlayson about One ROM! Why does the retro-computing world need a solution for replacement ROMs? How difficult was it to squeeze a …read more

Hackaday @hackaday-feed.bsky.social · 1d

Ask Hackaday: Why is TTL 5 Volts?

Ask Hackaday: Why is TTL 5 Volts?

The familiar five volts standard from back in the TTL days always struck me as odd. Back when I was just a poor kid trying to cobble together my first …read more

Hackaday @hackaday-feed.bsky.social · 1d

A Minicomputer Tape Drive Receives Some Love

A Minicomputer Tape Drive Receives Some Love

Taking on a refrigerator-sized minicomputer is not for the faint-hearted, but [Usagi Electric] has done it with a DEC PDP-11/44. He’s not doing it in half measures either, for his …read more

Hackaday @hackaday-feed.bsky.social · 1d

Reshaping Eyeballs With Electricity, No Lasers Or Cutting Required

Reshaping Eyeballs With Electricity, No Lasers Or Cutting Required

Glasses are perhaps the most non-invasive method of vision correction, followed by contact lenses. Each have their drawbacks though, and some seek more permanent solutions in the form of laser …read more

Hackaday @hackaday-feed.bsky.social · 1d

Homebrew Dam Control System Includes all the Bells and Whistles

Homebrew Dam Control System Includes all the Bells and Whistles

Over on brushless.zone, we’ve come across an interesting write-up that details the construction of a dam control system. This is actually the second part, in the first, we learn that …read more

Hackaday @hackaday-feed.bsky.social · 2d

Building the DVD Logo Screensaver with LEGO

Building the DVD Logo Screensaver with LEGO

There’s something extremely calming and pleasing about watching a screensaver that merely bounces some kind of image around, with the DVD logo screensaver of a DVD player being a good …read more

Hackaday @hackaday-feed.bsky.social · 2d

Tips for C Programming from Nic Barker

Tips for C Programming from Nic Barker

If you’re going to be a hacker, learning C is a rite of passage. If you don’t have much experience with C, or if your experience is out of date, …read more

Hackaday @hackaday-feed.bsky.social · 2d

Building a Diwheel to Add More Tank Controls to Your Commute

Building a Diwheel to Add More Tank Controls to Your Commute

It’s often said that one should not reinvent the wheel, but that doesn’t mean that you cannot change how the use of said wheel should be interpreted. After initially taking …read more

Hackaday @hackaday-feed.bsky.social · 2d

JawnCon Returns This Weekend

JawnCon Returns This Weekend

For those local to the Philadelphia area, a “jawn” can be nearly anything or anyone — and at least for this weekend, it can even be a hacker con building …read more

Hackaday @hackaday-feed.bsky.social · 2d

Qualcomm Introduces the Arduino Uno Q Linux-Capable SBC

Qualcomm Introduces the Arduino Uno Q Linux-Capable SBC

Generally people equate the Arduino hardware platforms with MCU-centric options that are great for things like low-powered embedded computing, but less for running desktop operating systems. This looks about to …read more

Hackaday @hackaday-feed.bsky.social · 2d

Can a Coin Cell Make 27 Volts?

Can a Coin Cell Make 27 Volts?

We have all no doubt at some point released the magic smoke from a piece of electronics, it’s part of what we do. But sometimes it’s a piece of electronics …read more

Hackaday @hackaday-feed.bsky.social · 2d

Smart Bulbs Are Turning Into Motion Sensors

Smart Bulbs Are Turning Into Motion Sensors

If you’ve got an existing smart home rig, motion sensors can be a useful addition to your setup. You can use them for all kinds of things, from turning on …read more

Hackaday @hackaday-feed.bsky.social · 3d

A Lorenz Teletype Shows Us Its Secrets

A Lorenz Teletype Shows Us Its Secrets

When we use the command line on Linux, we often refer to it as a terminal. It’s a word with a past invoking images of serial terminals, rows of green-screened …read more

Hackaday @hackaday-feed.bsky.social · 3d

A New Cartridge for an Old Computer

A New Cartridge for an Old Computer

Although largely recognizable to anyone who had a video game console in the 80s or 90s, cartridges have long since disappeared from the computing world. These squares of plastic with …read more