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

Repurposing Old Smartphones for Home Automation | | The source for Linux information

Posted by jpluimers on 2019/03/13

Interesting read and watch:

At the recent Embedded Linux Conference and OpenIoT Summit, Mozilla Technical Evangelist Dietrich Ayala proposed a simple and affordable solution to home automation: A discarded smartphone can handle some of the most useful home automation tasks without requiring expensive hubs and sensors — or risking data security in the cloud.

Source: [WayBackRepurposing Old Smartphones for Home Automation | | The source for Linux information.

Via Ruurd Pels.

GitHub Repository  autonome/context by autonome (Dietrich Ayala)


Posted in Development, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User, Software Development | Leave a Comment »

Smart idea: powering a stack of Raspberry Pi using 2.1mm barrel connector splitter…

Posted by jpluimers on 2019/02/20

Smart idea by [WayBacktinspin/rupy: Async. HTTP & NoSQL Distr. VHost PaaS at [WayBack687474703a2f2f686f73742e727570792e73652f636c75737465722e6a7067 (480×640):

Apart from one part I found on Amazon, most parts (and more if you want to built it for instance inside a case) can be obtained from [WayBackDC : Adafruit Industries, Unique & fun DIY electronics and kits, see the pictures and links below.

I think [WayBackpower supply options for multiple PIs – Raspberry Pi Forums got inspired by this or vice versa.

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

Insentricity :: Adding Solid-State Storage to an Original IBM PC ::

Posted by jpluimers on 2019/02/19

Can you imagine MS-DOS 6.2 recognising an 8 gigabyte SD card and allowing it to format it with multiple 2 gigabyte partitions?

Keeping old stuff working: [WayBackInsentricity :: Adding Solid-State Storage to an Original IBM PC :: with these nice links:


via: [WayBack] There was a lot of interest in how I added solid-state storage when I was tweeting about it a few weeks ago, now you can see… – Chris Osborn – Google+


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

web based tools to simulate electronics

Posted by jpluimers on 2019/02/13

Via seedstudio, I bumped into EasyEDA – Wikipedia. It seems there are a lot of on-line tools that allow you to draw and often simulate electronics.

Time to put them on my list of stuff to play around with:

Circuitlab also has a nice free interactive book: [WayBack] “Ultimate Electronics” Book – CircuitLab A free interactive electronics textbook, “Ultimate Electronics”

Later – via issue #1 of [WayBack] HackSpace magazine: The new magazine for the modern maker – I also found out about Fritzing which is off-line native software that I want to check out as it is open source:

[] Fritzing

It helps a lot knowing there are various Electronic symbol – Wikipedia: Standards for symbols, covering much more than the one below:

To make it easier, power supplies have a host of different symbols for the same things. For instance, DC can have 3 or more different symbols. [WayBack] Electric Current Symbols


Posted in Development, Hardware Development | Leave a Comment »

Build a Power Bank in $2: 7 Steps (with Pictures)

Posted by jpluimers on 2019/02/12

Cool: [WayBackBuild a Power Bank in $2: 7 Steps (with Pictures)



  1. salvage 18650 batteries from laptop battery packs
  2. test to separate good ones from bad ones
  3. assemble together the good ones
    1. put them in a holders
    2. solder plusses to plusses and minuses to minuses
  4. add charger electronics
  5. test
  6. put acrylic plate on front/back

Stuff you need:

  • battery tester:
  • charger electronics:
  • holders (clicks together in sets of 3 batteries):
  • acrylic sheet:



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

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