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ArtSci MagiCalc The Visual Difference. See for yourself.
6 hours ago
Arduino Blog
MIT’s Octopus is a delightful environmental sensor for urban deployment There are a lot of very good reasons to monitor local environmental conditions, especially as they...
2 days ago
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2 days ago
There are a lot of very good reasons to monitor local environmental conditions, especially as they pertain to climate change research and various ecological protection initiatives. But doing so in urban locales is a challenge, as simply mounting a device can be difficult. That’s...
Arduino Blog
An Arduino Opta micro PLC safely controls this massive solar panel lift The dividing line between microcontroller development board and programmable logic controller (PLC)...
3 days ago
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3 days ago
The dividing line between microcontroller development board and programmable logic controller (PLC) use cases has become increasingly blurred in recent years, as today’s Arduino hardware is very robust and reliable. But there are still situations in which peace of mind and...
computers are bad
2025-08-25 teletext in north america I have an ongoing fascination with "interactive TV": a series of efforts, starting in the 1990s and...
3 days ago
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3 days ago
I have an ongoing fascination with "interactive TV": a series of efforts, starting in the 1990s and continuing today, to drag the humble living room television into the world of the computer. One of the big appeals of interactive TV was adoption, the average household had a TV...
Old Vintage...
Reverse-engineering Roadsearch Plus, or, roadgeeking with an 8-bit CPU other irredeemably nerdy habit is roadgeeking, exploring and mapping highways both old and new, and...
4 days ago
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4 days ago
other irredeemably nerdy habit is roadgeeking, exploring and mapping highways both old and new, and it turns out that 8-bit roadgeeking on ordinary home computers was absolutely possible. For computers of this class, devising an optimal highway route becomes an exercise not only...
Arduino Blog
Meet the teens behind RedSnapper: a smart Arduino-powered prosthetic arm An affordable, AI-assisted, wearable robotic arm? That’s not science fiction – it’s RedSnapper, an...
a week ago
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a week ago
An affordable, AI-assisted, wearable robotic arm? That’s not science fiction – it’s RedSnapper, an open-source prosthesis built by PAC Tech, a team of high school students from Istituto Maria Immacolata in Gorgonzola, Italy. Powered entirely by Arduino boards, their project won...
Arduino Blog
Your plants can now play your video games The population of the world is currently in an uproar as everyone panics about AI stealing jobs. But...
a week ago
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a week ago
The population of the world is currently in an uproar as everyone panics about AI stealing jobs. But nobody seems to be concerned about the possibility of plants stealing video games. Nobody, that is, except a team of researchers from KAIST and the Royal College of Art, who...
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Vote for the August 2025 + Post Topic Let's get this party started.
a week ago
Electronics etc…
Power Switch and Battery Replacement of an SR620 Universal Time Interval Counter Introduction The SR620 Repairing the SR620 Replacing the Backup 3V Lithium Battery Switching to an...
a week ago
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a week ago
Introduction The SR620 Repairing the SR620 Replacing the Backup 3V Lithium Battery Switching to an External Reference Clock Running Auto-Calibration Oscilloscope Display Mode References Footnotes Introduction A little over a year ago, I found a Stanford Research Systems SR620...
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Comics from March 1978 Issue of Creative Computing Old Timey fun
a week ago
./techtipsy
Those cheap AliExpress 18650 Li-ion cell power bank enclosures suck, actually I had a few old ThinkPad batteries lying around. They were big, bulky and not holding much of a...
a week ago
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a week ago
I had a few old ThinkPad batteries lying around. They were big, bulky and not holding much of a charge. Inside those were standard 18650 Li-ion battery cells. I have two TOMO M4 power banks around, and they are fantastic for reusing these old 18650 battery cells inside them. You...
Abort Retry Fail
Upgrading a Macintosh Classic II Some fun on a Sunday
a week ago
computers are bad
2025-08-16 passive microwave repeaters One of the most significant single advancements in telecommunications technology was the development...
a week ago
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a week ago
One of the most significant single advancements in telecommunications technology was the development of microwave radio. Essentially an evolution of radar, the middle of the Second World War saw the first practical microwave telephone system. By the time Japan surrendered, AT&T...
Arduino Blog
Learn how to make a 2D capacitive touch sensor with ElectroBOOM Mehdi Sadaghdar, better known as ElectroBOOM, created a name for himself with shocking content on...
2 weeks ago
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2 weeks ago
Mehdi Sadaghdar, better known as ElectroBOOM, created a name for himself with shocking content on YouTube full of explosive antics. But once you get past the meme-worthy shenanigans, he is a genuinely smart guy that provides useful and accessible lessons on many electrical...
Arduino Blog
This novel 3D printer kinematic system uses a mouse sensor for closed-loop control Robert Murray-Smith wants to experiment with a novel 3D printer kinematic system that drives a round...
2 weeks ago
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2 weeks ago
Robert Murray-Smith wants to experiment with a novel 3D printer kinematic system that drives a round bed through a friction interface — essentially a polar 3D printer, but without the backlash associated with gears. However, friction drives have a tendency to slip and so he will...
./techtipsy
The 'politsei' problem, or how filtering unwanted content is still an issue in 2025 A long time ago, there was a small Estonian website called “Mängukoobas” (literal translation from...
2 weeks ago
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2 weeks ago
A long time ago, there was a small Estonian website called “Mängukoobas” (literal translation from Estonian is “game cave”). It started out as a place for people to share various links to browser games, mostly built with Flash or Shockwave. It had a decent moderation system,...
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What Interviews Should I Look For? Help point me in the right direction.
2 weeks ago
Electronics etc…
Repairing an HP 5370A Time Interval Counter MathJax.Hub.Config({ jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [...
2 weeks ago
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2 weeks ago
MathJax.Hub.Config({ jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$', '$'], ["\\(", "\\)"] ], displayMath: [ ['$$', '$$'], ["\\[", "\\]"] ], processEscapes: true, skipTags: ['script', 'noscript', 'style', 'textarea', 'pre',...
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Practical Computing Interviewed Alan Sugar (1985) A Quick Look Behind the Scenes at Amstrad.
2 weeks ago
Arduino Blog
A robotic hand with the dexterity to sign the whole ASL alphabet Even if we ignore intelligence, humans are able to speak when other animals — even other great apes...
2 weeks ago
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2 weeks ago
Even if we ignore intelligence, humans are able to speak when other animals — even other great apes — can’t, because of our specialized and complex vocal anatomy. Similarly, ASL (American Sign Language) wouldn’t be possible without our incredible hand and finger dexterity. Like...
Arduino Blog
Updated Arduino cores with ZephyrOS (beta)   Last December we released our beta Arduino cores based on Zephyr. Today, we are excited to make...
3 weeks ago
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3 weeks ago
Last December we released our beta Arduino cores based on Zephyr. Today, we are excited to make another step in this beta program for Arduino cores based on Zephyr! ZephyrOS is an open-source, state-of-the-art, real-time operating system (RTOS) designed for low-power,...
Arduino Blog
Is your heating radiator working? This system uses edge AI to find out Heating isn’t just about comfort in very cold regions in the world, it is absolutely critical. If...
3 weeks ago
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3 weeks ago
Heating isn’t just about comfort in very cold regions in the world, it is absolutely critical. If your home’s heat fails when you’re away, you might get back to find burst pipes. That’s especially problematic for large apartment buildings that rely on central boilers and...
./techtipsy
How to run Uptime Kuma in Docker in an IPv6-only environment I use Uptime Kuma to check the availability of a few services that I run, with the most important...
3 weeks ago
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3 weeks ago
I use Uptime Kuma to check the availability of a few services that I run, with the most important one being my blog. It’s really nice. Today I wanted to set it up on a different machine to help troubleshoot and confirm some latency issues that I’ve observed, and for that purpose...
Arduino Blog
This inexpensive adapter brings Apple Universal Control to vintage Macs In the distant past of about two decades ago, one would need to use a KVM (Keyboard, Video, Mouse)...
3 weeks ago
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3 weeks ago
In the distant past of about two decades ago, one would need to use a KVM (Keyboard, Video, Mouse) switch to control multiple computers with the same mouse and keyboard — and even then, it would take a button press to move from one to the other. Today, Apple’s Universal Control...
./techtipsy
3D printing is pretty darn cool, actually I love 3D printing. Out of all the tech hype cycles and trends over the last decade, this one is...
3 weeks ago
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3 weeks ago
I love 3D printing. Out of all the tech hype cycles and trends over the last decade, this one is genuinely useful. There’s simply something magical about being able to design or download a model from the internet, send it to a machine, and after a few hours you get an actual...
Old Vintage...
A real PowerBook: the Macintosh Application Environment on a PA-RISC laptop I like the Power ISA very much, but there's nothing architecturally obvious to say that the next...
3 weeks ago
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3 weeks ago
I like the Power ISA very much, but there's nothing architecturally obvious to say that the next natural step from the Motorola 68000 family must be to PowerPC. For example, the Palm OS moved from the DragonBall to ARM, and it's not necessarily a well-known fact that the...
Christian Selig
High quality, low filesize GIFs While the GIF format is a little on the older side, it’s still a really handy format in 2025 for...
3 weeks ago
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3 weeks ago
While the GIF format is a little on the older side, it’s still a really handy format in 2025 for sharing short clips where an actual video file might have some compatibility issues. For instance, I find when you just want a short little video on your website, a GIF is still so...
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Your Computer Interviewed Chris Curry (1981) Chris talks about his work with Clive Sinclair and Acorn Computers with a little BBC Micro.
3 weeks ago
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Disking Banana Go Bananas
3 weeks ago
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Microlog Babytalk Let Babytalk do the talking.
4 weeks ago
Engineers Need Art
Camera Genealogica (Part 1) I’m very much into genealogy. I came to realize that my interest was more specifically as a kind of...
4 weeks ago
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4 weeks ago
I’m very much into genealogy. I came to realize that my interest was more specifically as a kind of photograph genealogist.
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Altima NSX Light in weight. Light in price. Heavy in features.
4 weeks ago
Arduino Blog
Could these VR haptic gloves replace human touch? We’re seeing a substantial turn towards online social interaction replacing in-person social...
4 weeks ago
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4 weeks ago
We’re seeing a substantial turn towards online social interaction replacing in-person social interaction — especially among the younger generations. That was exacerbated and accelerated by the COVID-19 pandemic. But mountains of research show that physical touch is critical to a...
Arduino Blog
VirCHEW Reality finally lets people gnaw on VR food Modern virtual reality headsets provide really great visuals and audio, but many experiences can’t...
a month ago
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a month ago
Modern virtual reality headsets provide really great visuals and audio, but many experiences can’t be conveyed through those alone. There have been many attempts to expand on that to create more immersive experiences — we’ve even seen hardware to provide scent and thermal...
computers are bad
2025-07-27 a technical history of alcatraz Alcatraz first operated as a prison in 1859, when the military fort first held convicted soldiers....
a month ago
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a month ago
Alcatraz first operated as a prison in 1859, when the military fort first held convicted soldiers. The prison technology of the time was simple, consisting of little more than a basement room with a trap-door entrance. Only small numbers of prisoners were held in this period,...
Arduino Blog
Introducing the Arduino Nano R4: small in size, big on possibilities We’re excited to welcome a new member to the Arduino Nano family – the Nano R4. Powered by the same...
a month ago
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a month ago
We’re excited to welcome a new member to the Arduino Nano family – the Nano R4. Powered by the same RA4M1 microcontroller that’s at the core of the popular UNO R4 boards, this tiny-yet-mighty module is here to help you take your projects from prototype to product, smoothly and...
Arduino Blog
This robot picks locks using brains instead of brawn A physical lock, like what secures your front door, has a finite and calculable number of...
a month ago
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a month ago
A physical lock, like what secures your front door, has a finite and calculable number of combinations, just like a digital keypad does. There are a set number of pins in the lock and each can be one of a set number of lengths. Each of those numbers varies based on manufacturer...
Arduino Blog
Dive into satellite IoT with the new Arduino-compatible Iridium Certus 9704 Development Kit IoT (Internet of Things) devices can be very useful, but they do, by definition, require internet...
a month ago
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a month ago
IoT (Internet of Things) devices can be very useful, but they do, by definition, require internet access. That’s easy enough when Wi-Fi® is available, and it is even possible to rely on LoRa® and cellular data connections to transmit data outside of urban areas. However,...
./techtipsy
PSA: part of your Kagi subscription fee goes to a Russian company (Yandex) Today I learned that Kagi uses Yandex as part of its search infrastructure, making up about 2% of...
a month ago
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a month ago
Today I learned that Kagi uses Yandex as part of its search infrastructure, making up about 2% of their costs, and their CEO has confirmed that they do not plan to change that. To quote: Yandex represents about 2% of our total costs and is only one of dozens of sources we use. To...
Arduino Blog
Alvik Fight Club: A creative twist on coding, competition, and collaboration What happens when you hand an educational robot to a group of developers and ask them to build...
a month ago
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a month ago
What happens when you hand an educational robot to a group of developers and ask them to build something fun? At Arduino, you get a multiplayer robot showdown that’s part battle, part programming lesson, and entirely Alvik. The idea for Alvik Fight Club first came to life during...
Arduino Blog
This DIY programmable diaphragm pump is perfect for lab use If you need to move fluid from one vessel to another, you’re probably going to want a pump of some...
a month ago
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a month ago
If you need to move fluid from one vessel to another, you’re probably going to want a pump of some kind. Typical inexpensive pumps are usually only on or off, so you can’t easily control the flow rate. Those that do have some kind of analog adjustment are usually imprecise, which...
./techtipsy
How a Hibernate deprecation log message made our Java backend service super slow It was time to upgrade Hibernate on that one Java monolithic1 backend service that my team was...
a month ago
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a month ago
It was time to upgrade Hibernate on that one Java monolithic1 backend service that my team was responsible for. We took great precautions with these types of changes due to the scale of the system, splitting changes into as many small parts as possible and releasing them as often...
Christian Selig
You should repaste your MacBook (but don't) My favorite memory of my M1 Pro MacBook Pro was the whole sensation of “holy crap, you never hear...
a month ago
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a month ago
My favorite memory of my M1 Pro MacBook Pro was the whole sensation of “holy crap, you never hear the fans in this thing”, which was very novel in 2021. Four years later, this MacBook Pro is still a delight. It’s the longest I’ve ever owned a laptop, and while I’d love to pick up...
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Six Game Devs Speak to Computer Games Mag (1984) Meet the Creators of Choplifter, Wizardry, Castle Wolfenstein, Zaxxon, Canyon Climber, and the...
a month ago
Arduino Blog
New AWS x Arduino Opta Workshop: Connect your PLC to the Cloud in just a few steps We’re excited to invite you to a brand-new workshop created in collaboration with Amazon Web...
a month ago
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a month ago
We’re excited to invite you to a brand-new workshop created in collaboration with Amazon Web Services (AWS). Whether you’re modernizing factory operations or tinkering with your first industrial project, this hands-on workshop is your gateway to building cloud-connected PLCs that...
Arduino Blog
This Beyblade battlebot is like a whirling dervish of destruction Battlebots are fascinating, because their builders always manage to come up with unique new ways of...
a month ago
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a month ago
Battlebots are fascinating, because their builders always manage to come up with unique new ways of destroying opponents while avoiding damage at the same time. Like any good sport, it involves metagaming to develop a strategy based on expected opponent strategies. Ari’s strategy...
Abort Retry Fail
The History of Acer A Shy Kid Builds the Taiwanese Tech Industry
a month ago
Arduino Blog
Concept Bytes’ coffee table tracks people and walks itself across a room when called The term “mmWave” refers to radio waves with wavelengths on the millimeter scale. When it comes to...
a month ago
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a month ago
The term “mmWave” refers to radio waves with wavelengths on the millimeter scale. When it comes to wireless communications technology, like 5G, mmWave allows for very fast data transfer — though that comes at the expense of range. But mmWave technology also has some very useful...
Arduino Blog
Building a Wi-Fi robot controller that accepts voice commands The whole point of a robot is that it can operate without direct control input from an operator....
a month ago
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a month ago
The whole point of a robot is that it can operate without direct control input from an operator. Except there are many exceptions and it isn’t uncommon for roboticists and operators to require direct control. The Tinkering Techie needed to add that capability to his rover robot...
computers are bad
2025-07-06 secret cellular phone numbers A long time ago I wrote about secret government telephone numbers, and before that, secret military...
a month ago
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a month ago
A long time ago I wrote about secret government telephone numbers, and before that, secret military telephone buttons. I suppose this is becoming a series. To be clear, the "secret" here is a joke, but more charitably I could say that it refers to obscurity rather than any real...