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A new cycle-stepped 6502 CPU emulator
TL;DR: The how and why of the new 6502 emulator in the chips project.
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Retro 5″ Black and White TV as a computer monitor – A tale of pointlessness
The convoluted and ultimately pointless tale of how I connected a retro 80s 5" BW TV to my PC as a 3rd monitor
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No Strong Opposition to 144-146 MHz Reallocation Proposal at CEPT Meeting
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
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Arduino programmable air, pneumatics kit
Arduino boards have been employed in all sorts of robotics and IoT applications, although working with air as a power source is less than straightforward.
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LibrePCB 0.1.3 released, now with DRC
This release adds a lot of (long-awaited) new features and important bugfixes to LibrePCB. Highlights Design Rule Check for Boards (#581) Finally the board editor got a design rule check! It checks a PCB for common mistakes like missing connections, too small clearances (or shorts), or too thin copper elements. A new…
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Camera vs. Lidar
Company updates and technology articles from Scale AI.
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An Introduction to C and GUI Programming
An Introductrion to C & GUI Programming, the new book from Simon Long and the Raspberry Pi Press is out now. Get your copy today.
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End of Year Librem 5 Update
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
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IBM System 360 Model 20 restoration: The big push
Well, where to start! The last few weeks have consisted primarily of anticipation, excitement, and towards the end, utter exhaustion. But finally, FINALLY, the IBM is home!
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My Laptop Bit Me – The Shocking Truth (2012)
Apple aren't the only company with products that can feel tingly or buzzy to a light touch, it is all due to the widespread use of switched...
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The first dexterous and sentient hand prosthesis has been successfully implanted
Your Content Goes Here A female Swedish patient with hand amputation has become the first recipient of an osseo-neuromuscular implant to control a dexterous hand prosthesis. In a pioneering surgery, titanium implants were placed in the two forearm bones (radius and ulnar), from which electrodes to nerves and muscle…
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The Joys of Unix Keyboards
A decade or so ago while helping a friends father clean out an old building, we came across an ancient Sun Microsystems server. We found it curious. Everything about it was different from what we were used to. The command line was black text on a white background, the connectors strange and foreign, and the keyboard…
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Raspberry Pi microSD follow-up, SD Association fools me twice?
/ Fool me once, shame on you. Fool me twice, \ \ prepare to die. (Klingon Proverb) / -------------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || (Excerpt from Ansible for DevOps, chapter 12.) The fallout from this year's microSD card performance comparison has turned into quite a…
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“It's done in hardware so it's cheap” (2012)
This is one of these things that look very obvious to me, to the point where it seems not worth discussing. However, I've heard the idea that "hardware magically makes things cheap" from several PhDs over the years. So apparently, if you aren't into hardware, it's not obvious at all.
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An Introduction to CubeSats
An introduction that answers the questions what are cubesats, why they are so popular, what are their main subststems, and how does thier future look?
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Powering a Mainframe
The last few days have been eventful. I was contacted by the datacenter that the mainframe's cage is now ready for moving in, and the power ...
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Vintage video game cartridges with built-in modems
A lot of contemporary video game players take online communications for granted—after all, online services have been a standard feature in consoles for nearly fifteen years at this point1. However, before the ubiquity of the internet there was a time when some clever cartridges let gamers run up to the...
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Deciphering the Messages of Apple’s T2 Coprocessor
Explore the Duo Blog for expert tips, security insights, and resources to stay updated on the latest in security and access management trends.
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Updates to Works with Nest
Updates to the Works with Nest platform transition to the Works with Google Assistant platform
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Raspberry Pi microSD card performance comparison
Note: I also posted a separate review of some A2 'Application Performance' class cards, see this post: A2-class microSD cards offer no better performance for the Raspberry Pi. As a part-time tinkerer and full-time developer, I have been fascinated by single board computers (SBCs) since the first Raspberry Pi was…
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Lisp Badge – Self-contained ATmega1284 Lisp computer
This is a self-contained computer with its own display and keyboard, based on an ATmega1284, that you can program in the high-level language Lisp:
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A computer built from NOR gates: inside the Apollo Guidance Computer
We recently restored an Apollo Guidance Computer 1 , the computer that provided guidance, navigation, and control onboard the Apollo flight...
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Why open hardware needs open software
As KiCad’s lead developer, Wayne, and his team have a big vision – to build a best-in-breed PCB design tool. It’s an ambitious goal for an open-source project whose commercial counterparts have seen millions in investment. But KiCad is well on that path. An ever-increasing number of designers now use the PCB design…
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Visualizing Commodore 1541 Disk Contents
G64 files are C64/1541 disk images that contain all bits as they are physically laid out on the 5¼-inch floppy disk. Let’s visualize them! This animation shows 28 regular Commodore 1541 disks. Track 1 contains 21 sectors. Every sector is prefixed by two small red areas: These are the SYNC marks.…
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Facebook announces next-generation Open Rack frame
As a founding member of the Open Compute Project (OCP) community, Facebook embraces a collaborative approach to solving industry-wide problems. One of the more pressing problems facing the industry…