Posted by jpluimers on 2026/06/11
[Wayback/Archive] USB-SD-Mux with drivers written in Python at [Wayback/Archive] linux-automation/usbsdmux: USB-SD-Mux Project – Driver and Documentation and documentation at [Wayback/Archive] USB-SD-Mux Manual — usb-sd-mux-M01-R10-V01.
- Shape of an Micro-SD Card: Is plugged into the Micro-SD-Card socket of a DUT.
- LEDs indicate the status
- Micro-SD-Card slot: Insert the micro-SD-Card here.
- Micro-USB port: Conntects the USB-SD-Mux to a host PC via an USB-Cable.
Posted in Arduino, Development, Hardware Development, Raspberry Pi, Software Development | Leave a Comment »
Posted by jpluimers on 2026/06/10
The ever returning problem I have seen over the last 40 years: [Wayback/Archive] Don’t outsource the problem solving – YouTube
--jeroen
Posted in Development, Hardware Development, Software Development | Leave a Comment »
Posted by jpluimers on 2026/06/09
A very important report from September 2025 for users of 18650 lithium-ion battery cells: [Wayback/Archive] The Lumafield Battery Quality Report.
Summary:
… beneath the surface, a hidden world of quality control issues and dangerous counterfeits puts consumers and manufacturers at risk.
…
Our automated analysis focused on key indicators of cell safety and quality, including anode overhang (AOH) and edge alignment, two critical factors that directly impact battery performance and safety.
…
Flawed anq quality battery cells:
Posted in 18650, Batteries, Development, Hardware, Hardware Development, Li-Ion, Power User | Leave a Comment »
Posted by jpluimers on 2026/06/03
Interesting, but be aware that using it outside a shielded environment likekly is illegal: [Wayback/Archive] Osmo-fl2k – osmo-fl2k – Open Source Mobile Communications
- osmo-fl2k allows to use USB 3.0 to VGA adapters based on the Fresco Logic FL2000 chip, which are available for around $5, as general purpose DACs and SDR transmitter generating a continuous stream of samples by avoiding the HSYNC and VSYNC blanking intervals.
…
- Operating a transmitter with the unfiltered FL2000 DAC output attached to an antenna outside a RF shielding chamber is dangerous. Don’t do it!
Posted in Development, Hardware Development, Infosec (Information Security), Pen Testing, Power User, Red team, Security | Leave a Comment »
Posted by jpluimers on 2026/05/06
Cool to see what 3D printing plus a Raspberry Pi emulating a C64 can do [Wayback/Archive] I Built a Commodore 64 Laptop That Never Existed (PI + EMULATION) – The Portable 64 Concept Design – YouTube.
The Portable 64 with an original Commodore 64 joystick
However, published in December 2025 after Commodore had been resurrected from the C= brands, it would have been way cooler if was based on new Commodore 64 Ultimate hardware.
Maybe someone will do such a portable computer based on that hardware, or even better that it becomes available at [Wayback/Archive] Home | Commodore.
--jeroen
Posted in Development, Power User, History, Hardware Development, 6502, 3D printing, Commodore, C64, Retrocomputing | Leave a Comment »
Posted by jpluimers on 2026/05/05
The hackability of the [Wayback/Archive] DucoBox Silent “smart” home ventilation box with [Wayback/Archive] Flamingo-tech/Open-AIR: Open source system for home ventilation and control via HA based open hardware was shown by [Wayback/Archive] Jilles Groenendijk (@jilles_com) / Twitter with open source products from [Wayback/Archive] Browse products by TheFlamingo on Tindie in this Tweet:
[Wayback/Archive] Jilles Groenendijk on Twitter: “I bought a
duco.eu/uk/products/mechanical-ventilation/ventilation-units/eng-ducobox-silentripped out all its proprietary electronics and replaced it with open source hardware:tindie.com/stores/theflamingoNow I am able to measure temp/humidity/pressure/co2 of all the connected rooms. And switch the ventilation on each individual area.”
The above Tweet contains useful pictures and a video which I have added below the post signature because they so well show the placement of the open source hardware. Same for the pictures from:
tindie.com/stores/theflamingo “infosec.exchange/@jilles_com/109653396219635609“The whole setup integrates well with Home Assistant.
–jeroen
Posted in Development, Hardware Development | Leave a Comment »
Posted by jpluimers on 2026/04/14
Smart: [Wayback/Archive] Honghong Lu on Twitter: “Alcohol+paste flux = liquid flux It is pretty good, especially when I use to tin the cable with the solder pot.”
Posted in Development, Hardware Development, Soldering | Leave a Comment »
Posted by jpluimers on 2026/03/12
There used to be this great site, but it disappeared in 2023: [Wayback/Archive] Bowden’s Hobby Circuits
To ensure the table of contents stays somewhat indexed, I quote it below in full (all links are to the Wayback Machine; I have not checked them yet).
Found back via:
Posted in Development, Electronics Development, Hardware Development | Leave a Comment »
Posted by jpluimers on 2026/03/10
Soldering steps and common problems – Adafruit
These are nice references when you start to learn soldering:
The right part of the image from Adafruit is an almost 10 year old one that is heavily copied without reference. With reference, it is at¹
Adafruit also has this great link: [Wayback/Archive] Common Soldering Problems | Adafruit Guide To Excellent Soldering | Adafruit Learning System
The video:
- Clean with isopropyl alcohol
- Before soldering
- After soldering
Do not use (in the USA popular) rubbing alcohol, as that is only 70% (and 30% water) alcohol by volume: use at least 90%
- Use a dispenser for alcohol to dose tiny bits
- Use a non-woven tissue (large areas) or swab (small areas) for cleaning
Posted in Development, Hardware Development, Soldering | Leave a Comment »
Posted by jpluimers on 2026/02/27
AliExpress aggressive acidic flux solder has remarkably heavy reels:
Total Reel Solder % Solder/Total 100 gram 67 gram 33 gram 33 % 51 gram 32 gram 19 gram 37 % 20 gram 10 gram 10 gram 50 %
--jeroen
Posted in DIY, LifeHacker, Power User, Soldering | Leave a Comment »
The Wiert Corner - irregular stream of stuff 