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All about electronics and circuit design

Friday Fun: Back at office for meetings

When you’re meeting are back in the office, things are somewhat different than in remote working… Back to the Office: When Meetings are No Longer Virtual | Foil Arms and Hog The Expert: Progress Meeting (Short Comedy Sketch) The Expert (Short Comedy Sketch) More: The Expert: Wrong Angle (Short Comedy Sketch) The Expert: IT Support

Origin of Schuko®

“Schuko” is a short form of the German term Schutzkontakt (literally: protective contact),[1] which indicates that plug and socket are equipped with protective-earth contacts (in the form of clips). https://en.m.wikipedia.org/wiki/Schuko It is very commonly used throughout Europe for 230V 50 Hz AC power up to 16A. Origin of Schuko® https://www.plugsocketmuseum.nl/Schuko-origin.html

Contactless credit card secrets

Let’s take look at a modern credit card and the nifty electronics it contains. Modern credit cards contains a micro-controller that is connected to the credit card chip contacts and on cards with wireless payment also to an antenna coil inside the card. On the surface the chip inside a card is a typical micro

OWASP updates top 10

OWASP updates top 10 vulnerability ranking for first time since 2017 https://www.zdnet.com/article/owasp-updates-top-10-vulnerability-ranking-for-first-time-since-2017/ “Nonprofit foundation Open Web Application Security Project (OWASP) has released an updated draft of its ranking of the top 10 vulnerabilities, the first changes to the list since November 2017.” The list is available on-line at https://owasp.org/Top10/ Maybe the most significant change in

Professional cable tracer details

I saw this cable tracer equipment in use few days ago connected to a telephone cable. Here is the device connected to the cable. Closer view of the device reveals code CTT45 type code and manufacturer name VESALA. It is a product made by a Finnish company VESALA. The CTT45 is the transmitter part of

HDMI cable EMC failures

It seems that he quality of video cables sold in EU should be much better than it is now. I am not talking about mechanical strength or ability to transfer signal through, but the electromagnetic compatibility. The Swedish Electrical Safety Agency, together with other authorities within the EU, has tested HDMI and antenna cables. EMC

Big Outage Day October 4, 2021

Monday October 2021 was an Internet outage day. Many Facebook users faced outage and felt they had “internjet” instead of Internet. Also ePanorama.net has few hours outage. ePanorama.net went down few hours earlier. When I got my server up, in few hours Facebook was able to get their site up. Interesting correlation, but correlation does