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Electronics etc…
Repairing an HP 5370A Time Interval Counter MathJax.Hub.Config({ jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [...
3 weeks ago
84
3 weeks ago
MathJax.Hub.Config({ jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$', '$'], ["\\(", "\\)"] ], displayMath: [ ['$$', '$$'], ["\\[", "\\]"] ], processEscapes: true, skipTags: ['script', 'noscript', 'style', 'textarea', 'pre',...
Computer Ads from...
Practical Computing Interviewed Alan Sugar (1985) A Quick Look Behind the Scenes at Amstrad.
4 weeks ago
Computer Ads from...
Comics from March 1978 Issue of Creative Computing Old Timey fun
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...
4 weeks ago
27
4 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...
Abort Retry Fail
Upgrading a Macintosh Classic II Some fun on a Sunday
2 weeks 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...
2 weeks ago
26
2 weeks 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...
./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...
3 weeks ago
26
3 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,...
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...
a week ago
25
a week 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...
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...
3 weeks ago
25
3 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...
computers are bad
2025-08-16 passive microwave repeaters One of the most significant single advancements in telecommunications technology was the development...
2 weeks ago
25
2 weeks 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...
Computer Ads from...
What Interviews Should I Look For? Help point me in the right direction.
3 weeks 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...
2 weeks ago
24
2 weeks 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...
Computer Ads from...
Vote for the August 2025 + Post Topic Let's get this party started.
2 weeks ago
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...
2 weeks ago
22
2 weeks 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...
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...
a week ago
22
a week 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
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...
3 weeks ago
20
3 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...
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ArtSci MagiCalc The Visual Difference. See for yourself.
a week ago
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...
2 weeks ago
15
2 weeks 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...
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)...
a week ago
14
a week 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...
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...
a week ago
14
a week 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...
Abort Retry Fail
The QNX Operating System Quantum Software and the microkernel UNIX
5 days ago
Computer Ads from...
Byte Interviews IBM's Philip D. Estridge (1983) They dig into the IBM PC.
4 days ago
Old Vintage...
Microsoft makes 6502 BASIC open source It was probably going to happen sooner or later, but Microsoft has officially released the source...
2 days ago
9
2 days ago
It was probably going to happen sooner or later, but Microsoft has officially released the source code for 6502 BASIC. The specific revision is very Commodore-centric: it's the 1977 "8K" BASIC variant "1.1," which Commodore users know better as BASIC V2.0, the same BASIC used in...
Arduino Blog
Repurpose gadgets as Arduino-ready modules Most people have a general awareness of how economies of scale play into the cost of products; a...
an hour ago
2
an hour ago
Most people have a general awareness of how economies of scale play into the cost of products; a bespoke, handcrafted vase is going to cost a lot more than a mass-produced vase sold in the millions. But the ramifications of that concept can be really counterintuitive when it...
Arduino Blog
Turtle bots, Gestalt principles, and emergent art In the worlds of programming and robotics, turtles are entities — either virtual or physical robots—...
an hour ago
2
an hour ago
In the worlds of programming and robotics, turtles are entities — either virtual or physical robots— that follow commands to move around a 2D plane. Those are usually very simple commands, such as “move forward 10 units” or “rotate 90 degrees clockwise,” and they help people...
./techtipsy
Fairphone 5: my heavily biased overview after 58 days of use (and counting) After months of contemplating I finally pulled the trigger and got myself a Fairphone 5. The...
a year ago
227
a year ago
After months of contemplating I finally pulled the trigger and got myself a Fairphone 5. The fact that iPhone X stopped receiving major iOS updates certainly helped make that decision. “But why? My Xiaomi/Oneplus/Samsung/other glued-together device is like so much cheaper and...
./techtipsy
OpenWRT, ISP modem and dynamic IP addresses: how to fix connectivity issues without rebooting your... My current ISP provides an internet connection over a copper wire. To use it, I have a crappy modem...
a year ago
193
a year ago
My current ISP provides an internet connection over a copper wire. To use it, I have a crappy modem (Technicolor CGA2121, DOCSIS 3.0). It’s running in bridge mode, meaning that all it does is convert the signal running over the coax cable into plain old Ethernet. My main...
./techtipsy
The optimization treadmill: why I keep changing my computing setup all the time I have a bad habit of changing my computing setups all the time. I tend to see new gear, then I...
a year ago
192
a year ago
I have a bad habit of changing my computing setups all the time. I tend to see new gear, then I get some new ideas, and then I obsessively think about it for weeks and months until I just buy it. And then the cycle repeats. I’ve had time to think about why that keeps happening...
Arduino Blog
Meet Mr. Wallplate, an animatronic wall plate that speaks to you Interactive robots always bring an element of intrigue, and even more so when they feature unusual...
a year ago
186
a year ago
Interactive robots always bring an element of intrigue, and even more so when they feature unusual parts and techniques to perform their actions. Mr. Wallplate, affectionately named by Tony K on Instructables, is one such robot that is contained within an electrical wall plate...
Arduino Blog
GLEWBOT scales buildings like a gecko to inspect wall tiles A great deal of building maintenance expenses are the result of simple inaccessibility. Cleaning the...
a year ago
186
a year ago
A great deal of building maintenance expenses are the result of simple inaccessibility. Cleaning the windows are your house is a trivial chore, but cleaning the windows on a skyscraper is serious undertaking that needs specialized equipment and training. To make exterior wall...
computers are bad
2024-05-15 catalina connections Some things have been made nearly impossible to search for. Say, for example, the long-running...
a year ago
182
a year ago
Some things have been made nearly impossible to search for. Say, for example, the long-running partnership between Epson and Catalina: a query that will return pages upon pages of people trying to use Epson printers with an old version of MacOS. When you think of a point of sale...
./techtipsy
Zimaboard: the closest thing to my dream home server setup I stumbled upon this Hardware Haven video about the Zimaboard recently. I liked it a lot. I finally...
a year ago
182
a year ago
I stumbled upon this Hardware Haven video about the Zimaboard recently. I liked it a lot. I finally bought one. In short, Zimaboard is a small single-board computer that is relatively affordable and comes with an interesting selection of ports, which includes an exposed PCI...
detreville
The IBM 701 "IBM's first computer"
over a year ago
detreville
🎼This Is the Worst Trip I’ve Ever Been On 🎶 (A Lengthy Vacation Post-Mortem)
a year ago
Computer Ads from...
MicroSpeed PC-TRAC Let's Get Right To the Point
a year ago
Style over Substance
My Home Assistant setup (2023 edition) For the past few years, I have been running Home Assistant to make my apartment a smart home. It’s...
over a year ago
180
over a year ago
For the past few years, I have been running Home Assistant to make my apartment a smart home. It’s become such a hobby of mine that I’ve even started coding add-ons for it. While there are other popular automation platforms, Home Assistant’s versatility blows the rest out of the...
./techtipsy
Control - how to make a game enjoyable for casual audiences I’ve decided to intentionally take more time to play video games this year, since it’s a relatively...
a year ago
179
a year ago
I’ve decided to intentionally take more time to play video games this year, since it’s a relatively healthy way to escape from the real world once in a while. A friend recommended one game in particular: Control: Ultimate Edition. During the Steam summer sale of 2023, I went...
Electronics etc…
Zephyr Ravenna Control Board Replacement Blog post that probably has an audience of one, myself. Introduction Zephyr Ravenna - Confusing...
a year ago
178
a year ago
Blog post that probably has an audience of one, myself. Introduction Zephyr Ravenna - Confusing Information Two PCBs - Control Board & Switch Assembly Switch of the Breaker!!! Glass Canopy Removal Duct Cover Removal Swapping the Control...
computers are bad
2024-05-06 matrix For those of you who are members of the Matrix project, I wanted to let you know that I am running...
a year ago
177
a year ago
For those of you who are members of the Matrix project, I wanted to let you know that I am running for the Governing Board, and a bit about why. For those of you who are not, I hope you will forgive the intrusion. Maybe you'll find my opinions on the topic interesting anyway. I...
./techtipsy
Monitoring energy usage with smart plugs, Prometheus and Grafana This post isn’t a detailed line-by-line tutorial on how to set up each individual piece of the setup...
a year ago
174
a year ago
This post isn’t a detailed line-by-line tutorial on how to set up each individual piece of the setup as those types of guides tend to get out of date really easily, but if you know your way around Linux and the command line, then you can definitely replicate this setup on your...
./techtipsy
The hidden media play/pause/stop keys on the Lenovo ThinkPad L390 Yoga ThinkPad keyboards were once well known for their great layouts, feel and functionality. This...
a year ago
173
a year ago
ThinkPad keyboards were once well known for their great layouts, feel and functionality. This included the media playback control keys. On the ThinkPad T430, the new chiclet keyboard layout moved the media keys to the function row. Still there, but less convenient to access. The...
Electronics etc…
Tesla’s FSD - First and Last Impressions TLDR: It’s a useless technology demo. Introduction Rules of Engagement Test Ride 1: from Kings Beach...
a year ago
171
a year ago
TLDR: It’s a useless technology demo. Introduction Rules of Engagement Test Ride 1: from Kings Beach to Truckee (11 miles) Test Ride 2: I-80 from Truckee to Blue Canyon (36 miles) Test Ride 3: from West-Valley College to I-85 Entrance (1 mile) Conclusion Introduction In the past...
Abort Retry Fail
Housekeeping for 20240309 Super quick updates
a year ago
Engineers Need Art
VPX Scripting - Part 2 (Linting) The second in a series of posts about scripting Visual Pinball tables.
a year ago
Engineers Need Art
Building Quarter-Cab - Phase I Lets build a simple virtual pinball controller to bring more immersion to your game.
a year ago
Electronics etc…
Tektronix TDS 684B Oscilloscope Button Swap Introduction Removing the panels Swapping a Rotary Encoder Putting it all back together End...
a year ago
167
a year ago
Introduction Removing the panels Swapping a Rotary Encoder Putting it all back together End Result Introduction I recently bought a TDS 684B for cheap at a government auction. With 1 GHz BW and 5 Gsps sample rate, it can be used for those cases where my 350 MHz/2Gsps Siglent...
./techtipsy
How to take down production with a single Helm command You’re Cletus Kubernetus: a software developer, and a proud Fedora Linux user.1 You know Kubernetes,...
a year ago
167
a year ago
You’re Cletus Kubernetus: a software developer, and a proud Fedora Linux user.1 You know Kubernetes, especially after the time you migrated some services to it. Everything is calm. Your pods are running. Your service is up. Business as usual. You release some minor changes to...
Arduino Blog
Assess your aquarium’s health with an AI-enabled ultrasonic sensor Below the surface of any body of water, harmful amounts of toxic gases and contaminates can...
a year ago
166
a year ago
Below the surface of any body of water, harmful amounts of toxic gases and contaminates can accumulate, which leads to a loss in fish and plant populations if not fixed quickly. But because most water testing, especially in aquariums, is done primarily on the surface, vital...
Engineers Need Art
VPX Scripting - Part 1 (Teacher's Pet) The first in a series of posts about scripting Visual Pinball tables.
a year ago
Engineers Need Art
Kim-1 User Manual For sale: a few KIM-1 User Manuals I printed up.
over a year ago