A pearl suggested by the Twitter algorithm is [Archive] Mohit Bhoite | मोहित भोईटे (@MohitBhoite) / Twitter
Look at the beauty of for instance [Archive] Mohit Bhoite | मोहित भोईटे on Twitter: “Here is the end result. …” / Twitter
Archive for the ‘Electronics Development’ Category
Every now and then the Twitter algorithm suggests a pearl in the timeline. This tinme: Mohit Bhoite | मोहित भोईटे, who makes gorgeous 3D electronics design
Posted by jpluimers on 2023/05/19
Posted in Development, Electronics Development | Leave a Comment »
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.
- [WayBack] JIS – Japanese Industrial Standard
- [WayBack] Screwdriver – Wikipedia
- [WayBack] When a Phillips Is Not a Phillips! : 30 Steps (with Pictures) – Instructables (with about 30 different screw head types)
- [WayBack] The Japanese Phillips: JIS Screwdrivers — revlimiter.net (with a list of sources where to get the screwdrivers)
- [WayBack] What’s the Difference Between Japanese and Phillips Screwdrivers? – Ask MO
Share this:
Posted in DIY, Electronics Development, LifeHacker, Power User | Leave a Comment »
LED Chaser with only 4017 – YouTube
Posted by jpluimers on 2020/10/21
Cool:
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
–jeroen
Share this:
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
[WayBack] leistungen.gif (746×746)
Source [WayBack] MTM-Mess- & Stromversorgungstechnik e.U.: Bibliothek – Elektro Humor
Via [WayBack] Erich K – Google+
–jeroen
Share this:
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 Rating Configuration
Female/MaleInternational North America Wires Poles
C13/C14250 Volts
10 Amps125/250 Volts
15 Amps3 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 green/yellow green/yellow Neutral N blue blue Line, single phase L brown brown or black
Longer tables and infographics are here:
- description – IEC 60446: Use of colours – Wikipedia (above images of wire ends are from this article)
- tables – [Wayback/Archive] Wiring Color Codes : Color Codes – Electronics Textbook
- graphics – [Wayback/Archive]Wiring Color Codes Infographic : Color Codes – Electronics Textbook
–jeroen
Share this:
Posted in Development, Electronics Development, LifeHacker, Power User | 5 Comments »
The Wiert Corner - irregular stream of stuff 
