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

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Some links to investigate a Raspberry Pi system failing on an SD card that got bad

Posted by jpluimers on 2024/03/22

–jeroen

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Posted in *nix, *nix-tools, Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »

Compact fanless firewall appliance offers 6x 2.5GbE ports for $230 and up – CNX Software

Posted by jpluimers on 2024/03/14

Reminder: check reviews for this little device: [Wayback/Archive] Compact fanless firewall appliance offers 6x 2.5GbE ports for $230 and up – CNX Software

If referred to:

–jeroen

Posted in Development, Hardware, Hardware Development, Network-and-equipment, pfSense, Power User, routers | Leave a Comment »

I want to look at 120 degree V dipole antennas to see if I can improve FM reception in the house

Posted by jpluimers on 2024/02/09

Query: [Wayback/Archive] dipole antenna 120 degrees – Google Search

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Posted in Development, Hardware Development | Leave a Comment »

Can you IoT an Airwick air freshener? – James Callaghan

Posted by jpluimers on 2024/02/02

This 2020 project is still so cool!

[Wayback/Wayback] Can you IoT an Airwick air freshener? – James Callaghan:

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Posted in Development, ESP32, Hardware Development, Hardware Interfacing | Leave a Comment »

Some links on e-Ink displays and Raspberry Pi or ESP32

Posted by jpluimers on 2024/01/23

For my link archive:

–jeroen

Posted in Development, ESP32, Hardware Development, Hardware Interfacing, HDMI, Raspberry Pi | Leave a Comment »

Raspberry Pi And The Story Of SD Card Corruption | Hackaday

Posted by jpluimers on 2023/10/02

[Wayback/Archive] Raspberry Pi And The Story Of SD Card Corruption | Hackaday is long and worth reading.

For me the most important bits are how to prevent SD card wear:

  1. use good quality power supplies
  2. put write-heavy operations to SSD
  3. if it suits your use-case, use OverlayFS

The first is always a good idea. It is the primary reason all our electronics live behind a UPS:

In addition, I posted my personal experience (Samsung microSD cards last way longer than SanDisk cards) on Twitter:

[Wayback/Archive] @hackaday I’m have been running a few Raspberry Pi systems with 8-32Gb micro-SD cards as web-dashboard with refreshes every few minutes or so: much write access. When using Sandisk (no matter the type) they last about a year, Samsung (no matter the type) cards last multiple years.

Via: [Wayback/Archive] hackaday on Twitter: “Raspberry Pi And The Story Of SD Card Corruption https://t.co/R8KNVmQORD” / Twitter

EMP

We had a lightning strike in the evening on 20181111 some 50 meters from our home.

It killed immediately killed this (some pictures further below):

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Posted in *nix, Debian, Development, Hardware Development, Linux, Power User, Raspberry Pi, Raspbian | Leave a Comment »

APC SmartUPS Battery Float Voltage Calibration

Posted by jpluimers on 2023/07/19

For my link archive: [Wayback/Archive] APC SmartUPS Battery Float Voltage Calibration

It is my understanding that older BackUPS units could be adjusted with a potentiometer on the board. Calibration of newer models, and the SmartUPS line is factory set in the unit’s micro-controller. APC is of no assistance with units that are out of warranty. I’ve recently found information of how to recalibrate the battery float voltage through reprogramming the battery gain, and some information about modifying the UPS hardware, described below. I can’t take credit for discovering methods demonstrated, but hope it will be useful to another to have a coherent description.

Via:

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Posted in APC Smart-UPS, Development, Hardware Development, Power User, UPS | Leave a Comment »

An unexpected turn of events when Jeff Geerling posted “I’m hosting my website on a FARM!”

Posted by jpluimers on 2023/07/06

Some links on the unexpected turn of events after [Archive] Jeff Geerling (@geerlingguy) / Twitter posted

First his site got more traffic because of the post, then within an hour traffic exploded because of a DDoS overflowing both his Raspberry Pi cluster and his mobile data capacity.

Jeff will likely do blog posts on these and update the underlying GitHub repository at [Wayback/Archive] geerlingguy/turing-pi-2-cluster: Turing Pi 2 Cluster , but until then (since his Tweets were not threaded), this is what happened on 20220209 as it taught me a few bits:

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Posted in Cloud, Cloudflare, Containers, Development, Docker, Hardware Development, Infrastructure, Internet, Kubernetes (k8n), LifeHacker, OpenSpeedTest, Power User, Raspberry Pi, SpeedTest | Leave a Comment »

Dutch thread: improving a cheap T-962 reflow-oven to have more sensors, be earthed, and become more robust

Posted by jpluimers on 2023/06/13

Nice Dutch thread: [Archive] Dinsdale. – D💉ane Blijf thuis ⭕️ on Twitter: “Morgen een leuk projectje. Ik heb dit goedkope reflow-oventje. Heb uitgevogeld hoe ik de firmware kan flashen. De interface kan ik op Chinees of Engels zetten. Tevens heeft de nieuwe firmware meer mogelijkheden. ” / Twitter

It is similar to [Wayback/Archive] Improving The T-962 Reflow Oven | Hackaday.

Saved at [Wayback/Archive] Thread by @Dinsdal85174312 on Thread Reader App – Thread Reader App:

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Posted in Development, Hardware Development, Soldering | Leave a Comment »

Some links on measuring CO2 and Volatile Organic Compounds in the air

Posted by jpluimers on 2023/05/02

Some links on measuring these:

I was triggered by some messages in a thread:

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Posted in Development, ESP32, Hardware Development, Hardware Interfacing, IKEA hacks, LifeHacker, Power User | Leave a Comment »

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