The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Hardware Development’ Category

Pentium FDIV bug – 25 years ago; Ken Shirriff reverse engineerded the cause under a microsope

Posted by jpluimers on 2024/12/31

A small introduction is the Pentium FDIV bug – Wikipedia article which already has some of the highlights..

Ken Shirriff however went all the way in, and used a microscope to focus in on to the actual cause.

He wrote two Mastodon threads on it watching (most recent first, with a link to his blog post) making a good year’s end read:

And there is of course this, that predated his microscope work [Wayback/Archive] Ken Shirriff: “I recently saw an amazing Navajo rug…” – OldBytes Space – Mastodon Read the rest of this entry »

Posted in 8086, Development, Hardware Development, History | Leave a Comment »

Nerd Corner making life easier: Dupont connectors and soldering aids (3D printing) for jumper cables!

Posted by jpluimers on 2024/12/12

Making life easier for hardware fiddling people:

Cool solutions with .stl files.

Via [Wayback/Archive] Iceman on X: “This is nifty. A nice solution to a Real world problem Dupont cable mess! …”

--jeroen

Posted in Development, Hardware Development | Leave a Comment »

SCANSNAP iX100 SCANNER REPAIR MANUAL – PFU Ricoh Store

Posted by jpluimers on 2024/11/28

Ordered because all of a sudden, my scanner would only charge over USB, but not connect to any computer any more over USB (likekly because the Micro-USB connector on the mainboard was broken which is odd after just a few 100 inserts which is odd as it should last 10k+ cycles according to USB hardware – Wikipedia) [WaybackSave/Archive] SCANSNAP iX100 SCANNER REPAIR MANUAL – PFU Ricoh Store.

It costs only USB 0.00, so I hope they will send it outside of the USA.

When ordering, you have to agree with these:

When I don’t receive the manual, hopefully the translated version of this video will be of help: [WaybackSave/Archive] Reparación Scanner Fujitsu ScanSnap – Puerto De Carga Micro USB – YouTube -> Fujitsu ScanSnap Scanner Repair – Micro USB Charging Port – YouTube.

Como me pasa muchas veces esto grabe este video. Me piden que repare algo que ya intentaron reparar de la manera incorrecta.

->

As this happens to me many times, I recorded this video. I am asked to repair something that they already tried to repair incorrectly.

Queries:

--jeroen

Posted in Development, Fujitsu ScanSnap, Hardware, Hardware Development, ix100, Power User, Scanners | Leave a Comment »

Some links on 12V ~18Ah UPS replacement batteries

Posted by jpluimers on 2024/11/27

The cells for the APC RBC7 and RBC55 UPS battery packs are all the same: 12V varying from 17Ah to 22Ah, has M5 leads for mounting the cables, and dimensions of ~76.5 * 181.5 * 167.5 mm

These cells are collectively named UB12180 but searching that term will get you prices that are not far from the APC ones, and APC wants to charge you an arm and a leg for them (around EUR 75 per cell).

Searching for the individual cell capacity will get you better offers.

Related blog posts:

Some links for finding them; maybe around Black Friday (it’s in a few days: 2024-11-29) I can really good deals:

Read the rest of this entry »

Posted in APC Smart-UPS, Development, Hardware Development, UPS | Tagged: | Leave a Comment »

Jeffrey | JKCTech on X: “Dit is echt 1 van de aller mooiste edge cases voor een licht sensor die ik ooit heb gezien… https://t.co/wkm8ztbHI9” / X

Posted by jpluimers on 2024/11/26

[Wayback/Archive] Jeffrey | JKCTech on X: “Dit is echt 1 van de aller mooiste edge cases voor een licht sensor die ik ooit heb gezien… “

It references a movie by Dutch humor site (often on the wrong side of humor) Dumpert:

[Wayback/Archive] DUMPERT – Ambulance naast lichtsensor flat =

which they also put on YouTube: [Wayback/Archive] Ambulance + lichtsensor = flatrave! #shorts – YouTube.

It teaches to adjust the light sensors so they don’t kick in turning the light off too soon after it gets dark.

Read the rest of this entry »

Posted in Development, Hardware Development | Tagged: | Leave a Comment »

Hans Otten @hansotten@mastodon.social on X: “PiDP-11/70 with a real PDP-11 CPU, a DCJ11-AF”

Posted by jpluimers on 2024/11/14

Where old history meets modern history: [Wayback/Archive] Hans Otten @hansotten@mastodon.social on X: “PiDP-11/70 with a real PDP-11 CPU, a DCJ11-AF”

Read the rest of this entry »

Posted in Development, Emulators, Hardware Development, History, Power User, Raspberry Pi | Leave a Comment »

Turning Disposable Vapes into a Fast Charge Power Bank – YouTube

Posted by jpluimers on 2024/10/24

For a future project: [Wayback/Archive] Turning Disposable Vapes into a Fast Charge Power Bank – YouTube

(Note the video skips a lot of steps, not limited to these risks: these cells can explode and vapes can be a biohazard)

--jeroen


Posted in Development, Hardware Development | Leave a Comment »

Accessibility Myths – debunked

Posted by jpluimers on 2024/10/15

[Wayback/Archive] Accessibility Myths has great debunks.

Quite a few of them are phrased with a web perspective in mind. That’s just because of prevalence. These myths are there on native platforms (mobile, Windows, MacOS and Linux) as well and can be debunked in the same way.

Similar myths are even there for real life: accessibility of buildings, signage, streets, you name it are just that and can be debunked with common sense.

An inclusive society actually is cheaper than a exclusive one, as it benefits everyone. The same holds for your software.

Related: [Wayback/Archive] Learn Accessibility  |  web.dev

Via:

  1. [Wayback/Archive] Accessibility Awareness on X: “When you make the pitch for accessibility, be prepared for pushback. There are several myths and misconceptions, so it’s good to be aware of what they are and how to dispel them.”
  2. [Wayback/Archive] Accessibility Awareness on X: “”Learn Accessibility” is a course that takes you through the essentials for building accessible websites and web apps. Created for both beginners and advanced users, this course can be taken beginning to end, or used as a reference for specific topics.”

--jeroen

Posted in accessibility (a11y), Awareness, Development, Hardware Development, Inclusion / inclusive society, Power User, Software Development | Leave a Comment »

I’m not the only one storing tech gadgets in flight cases (:

Posted by jpluimers on 2024/09/05

It was about 2 years ago that Jilles reminded me I had a flight case with gadgets too.

Back when I assembled it in 2018, I had big plans for showing private “cloud” container experimentation and gadget stuff at conferences. Then 2019 kicked in with rectum cancer.

So it was good that he helped me motivating to get it working again, especially as the time around assembling it so much fun and working on it brought back those days.

Here are the pictures:

Read the rest of this entry »

Posted in *nix, *nix-tools, Cloud, Cloud Development, Containers, Debian, Development, Docker, GL-AR300M, GL.iNet, Hardware Development, Infrastructure, Kubernetes (k8n), Linux, openSuSE, Power User, Raspberry Pi, Raspbian, Software Development, SuSE Linux | Leave a Comment »

Smart idea: (re)use a solar panel as balcony power plant table

Posted by jpluimers on 2024/08/20

Still to do for Michael: put the inverter on the underside of the table-top.

[Wayback/Archive] Michael Eberhard on Twitter: “Nachdem wir eh einen neuen Tisch auf unserer Dachterrasse brauchten, gibt es nun einen Balkonkraftwerk-Tisch. Bloß der Wechselrichter muss noch unter der Tischplatte verträumt werden.”

The picture is below; this is the part list: [Wayback/Archive] Michael Eberhard on Twitter: “@TuckiTina @MatthiasVialon AlphaSolar Komplettpaket ca. 500€ Ikea Tischbeine 60€ Holz aus dem Bestand.” / Twitter

  • AlphaSolar full system ~500€
  • Ikea Table legs ~60€
  • Spare wood

Yield is not bad: [Wayback/Archive] Michael Eberhard on Twitter: “@truewhitemount Ich habe einen einfachen Zähler dazwischen. Gerade jetzt produziert der Tisch zwischen 180 und 230 Watt. In Summe bin ich im den letzten Tagen auf 0,6 – 0,8 kWh pro Tag gekommen. Noch ist die Motivation da, jeden Abend den Zähler abzulesen…” / Twitter

Read the rest of this entry »

Posted in Development, DIY, Electronics Development, Hardware Development, IKEA hacks, LifeHacker, Power User, Solar Power | Leave a Comment »