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

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Archive for the ‘Electronics Development’ Category

When a cross-head screw is not Philips, and you might need a JIS screwdriver

Posted by jpluimers on 2021/12/06

A while ago, when messing with some Asian electronics, I found that the cross-head screws in it do not fit Philips screwdrivers well.

The cause is the use of JIS (Japanese Industry Standard) cross-head screws in Japan and some other Asian regions.

JIS screws can also been found in other Asian mechanical stuff like motor-cycles and cars.

Here are some links about JIS screws and screwdrivers.

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Posted in DIY, Electronics Development, LifeHacker, Power User | Leave a Comment »

LED Chaser with only 4017 – YouTube

Posted by jpluimers on 2020/10/21


The triggering in this case is the result of a main power drop and recover. The battery is unable to keep the votage at 9V level at the very moment any led is turned on, the voltage is droped down. That is what makes pin 14 to get the clock pulse so the 4017 shifts to the next led. The moment the led is off and right before the next led is turned on the main power gets recovered. When the next led is on again, the main power drops down, and so on.

Schema but less explanation on: [WayBack] LED Chaser with only 4017 – RevealNew


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Posted in Development, Electronics Development, Hardware Development | 1 Comment »

Wirk-, Blind- und Scheinleistung auch für Nicht-Elektroniker

Posted by jpluimers on 2019/11/29

Endlich eine Sinnvolle Definition der 3 Leistungsarten: Wirk-, Blind- und Scheinleistung auch für Nicht-Elektroniker

[WayBackleistungen.gif (746×746)

Source [WayBackMTM-Mess- & Stromversorgungstechnik e.U.: Bibliothek – Elektro Humor

Via [WayBack] Erich K – Google+


Posted in Development, Electronics Development, Fun, LifeHacker, Power User | Leave a Comment »

C13/C14 wiring diagram live/neutral/earth

Posted by jpluimers on 2016/12/02

Edit 20220215/20200713: The original wiring description in this article was wrong, thanks Jules Vape and John Cooper for pointing this out in the comments.

This is the correct wiring according to IEC 60320 – Wikipedia: C13/C14_coupler: File:IEC60320 C13.jpg – Wikipedia (rotated for clarity) and Source: File:IEC60320 C14.jpg – Wikimedia Commons.

  • Facing the C13 female side that has holes:
    Position Lead
    Left N Neutral
    Middle ⏚/PE Protective Earth/Ground
    Right L Live
  • Facing the C14 male side that has pins:
    Position Lead
    Left L Live
    Middle ⏚/PE Protective Earth/Ground
    Right N Neutral

The same information from [WayBack] IEC 60320 (IEC 320) Reference Chart – IEC 60320 Connectors & Plugs | StayOnline:

IEC-60320 Plugs and Connectors
International North America Wires Poles
250 Volts
10 Amps
125/250 Volts
15 Amps
3 Wires 2 Poles

Wiring colours

If you wire it, the colours depend on where you live. I live in the Netherlands so this shortened table does apply:

IEC (most of Europe) AC power circuit wiring color codes.

Function Label Color, IEC Color, old IEC
Protective earth ⏚/PE Color wire green yellow.svg green/yellow Color wire green yellow.svg green/yellow
Neutral N Color wire light blue.svg blue Color wire light blue.svg blue
Line, single phase L Color wire brown.svg brown Color wire brown.svg brown or Color wire black.svg black

Longer tables and infographics are here:


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Posted in Development, Electronics Development, LifeHacker, Power User | 5 Comments »

Low power desktop – via: 8.5W Core i3-based desktop computer (English) – mux’ blog

Posted by jpluimers on 2012/08/12

Emile Nijssen, Dutch student Electronics at the Delft University of Technology wrote an interesting English 8.5W Core i3-based desktop computer abstract of a Dutch series of post getting a Desktop setup running far under 10W.

Though about 2 years old, they are immensely useful as not many people have thoroughly researched all that, and the info is still very applicable on more today’s hardware.

I got there because I was looking for some real world usage of VMP3203 DC/DC converters at 5V output that you can really well priced on DealExtreme (the PDF of the “datasheet” seems offline, but there is a Google cache of it).

If you can read/translate Dutch, this is the series (be sure to read the comments, as those contain about 25% of the info):

  1. Teaser: Core i3 desktopsysteem @ 10W idle… – mux’ blog.
  2. 10W core i3 systeem – de voorbereidingen – mux’ blog.
  3. 10W i3 systeem – de treinreis – mux’ blog.
  4. 10W i3 systeem – undervolten en hardwaremods! – mux’ blog.
  5. 10W i3-systeem: nu voor maar 8.5W! – mux’ blog.

He even won a prize of EUR 2500 with this design!

Great work!


Posted in Development, Electronics Development | Leave a Comment »

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