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Low Cost Metal 3D Printing by Electrochemistry

[Billy Wu] has been writing for a few years about electrochemical 3D printing systems that can handle metal. He’s recently produced a video that you can see below about the process. Usually, printing in metal means having a high-powered laser and great expense. [Wu’s] technique is an extension of electroplating. Boiling down the gist of the process,...

Two-Key Keyboard Build Log Starts Small, But Thinks Big

Interested in making a custom keyboard, but unsure where to start? Good news, because [Jared]’s build log for an adorable “2% Milk” two-key mini-keyboard covers everything you need to know about making a custom keyboard, including how to add optional RGB lighting. The only difference is that it gets done in a smaller and cheaper package than jumping...

A Computer in Your Pocket, 1980s Style

These days, having a little computer in your pocket is par for the course. But forty years ago, this was a new and high tech idea. [The 8-Bit Guy] has a great video covering the state of the art in pocket computers and personal digital assistants from the 1980s and 1990s. You can see the video below. There are a lot of familiar faces on the video including...

Do Androids Search for Cosmic Rays?

We always like citizen science projects, so we were very interested in DECO, the Distributed Electronic Cosmic-ray Observatory. That sounds like a physical location, but it is actually a network of cell phones that can detect cosmic rays using an ordinary Android phone’s camera sensor. There may be some privacy concerns as the phone camera will take...

Casio F-91W, Going Dark

The Casio F-91W is easily one of the most iconic and popular watches worldwide. But what’s cool about having the same exact thing as millions of other people? Not much, unless of course you modify it to make it your own. That’s exactly what [Gautchh] did to their beloved watch. Between permanent dark mode, stereo blue LED backlights, and a new strap,...

ESP32 Inkplate Gives Kindle Displays a Second Chance

Over the years, we’ve seen plenty of hackers repurpose their Kindle or similar e-reader to reap the benefits of its electronic paper display. Usually this takes the form of some software running on the reader itself, since cracking the firmware is a lot easier than pulling out the panel and figuring out how to operate it independently. But what if somebody...

mouSTer Brings USB to Retro Computers

Folks who like the take the old Amiga out for the occasional Sunday drive usually do it because they have wistful memories of the simpler times. Back when you could edit documents or view spreadsheets on a machine that had RAM measured in kilobytes instead of gigabytes. But even the most ardent retro computer aficionado usually allows for a bit of modern...

Meet the Magic Eye Vacuum Tube

Vacuum tubes ruled electronics for several decades and while you might think of them as simple devices analogous to a transistor or FET, there were many special types. We’re all familiar with nixie tubes that act as numeric displays, and there are other specialty tubes that work as a photomultiplier, to detect radiation, or even generate microwaves....

Hackaday Podcast 102: Raspberry Pi Microcontroller, Microphone Killswitch, and a 45-Degree 3D-Printer

Hackaday editors Elliot Williams and Mike Szczys sift through a week of excellent hacks. Big news is of course the Raspberry Pi microcontroller which Elliot had a few weeks to play around with on the bench before the announcement — it has some fascinating programmable modules (PIO) built in! Philips designed an LED light bulb that under-drives the LEDs...

Porting Firefox To Apple Silicon: Tales From The Trenches

For any smaller and larger software product that aims to be compatible with Apple’s MacOS, the recent introduction of its ARM-based Apple Silicon processors and MacBooks to go with them came as a bit of a shock. Suddenly one of the major desktop platforms was going to shift processor architectures, and with it likely abandon and change a number of APIs....

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