I have written about ground loop problems for over 25 years. I have published a lot of material over the years in this blog and in the documents section. I have had over years plans to combine and update the material to a physical book or e-book format. Ground Loops Demystified publication is now available →
I saw this circuit in facebook at https://www.facebook.com/share/p/1FF5z48oYV/. The screen capture is included here under fair use (commentary and critique). The good thing is that this is a simple circuit, but the disadvantage is that there is NO sound out with this design. – there is a battery drawn without clear indication of the operating →
Cybersecurity can be a laughing matter. Epic FAIL comic strip is a new comic strip series related to cybersecurity topics is now available on-line at https://www.instagram.com/storax_ltd/ The comic can be also found at Storax homepage at https://stor.ax/epicfail/index.html →
Facebook viral circuit from https://www.facebook.com/share/p/1buynd6caE/ analysis Let’s break this down calmly, because this circuit looks cooler than it actually is It works, but in the “Facebook shorts” sense, not in an engineering sense. It’s a very simple sound-reactive LED circuit. Big problem: There are NO current-limiting resistors for the LEDs. It might work for some →
In what country this is the recommended practice? Picture source: Facebook https://www.facebook.com/share/p/1DrRjhJH2r/ I have been reached that If you should not use a knot for cable strain relief. ⚠️ Important: If this is a 230 V / mains-powered device, proper mechanical strain relief is mandatory for safety and compliance. A knot is not a safe →
This posting is here to collect cyber security news in January 2026. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
30 Years of .mp3: Three Letters That Changed the World The technology behind these three letters has become an inseparable part of our daily lives: in 2025, the file extension “.mp3” celebrates its 30th anniversary. This audio format laid the foundation for many more groundbreaking audio codecs. The mp3 format cleverly takes advantage of the →
Data Privacy Day (or Data Protection Day in Europe) is celebrated annually on January 28 to raise awareness about the importance of respecting privacy, safeguarding data, and enabling trust. It commemorates the 1981 signing of Convention 108, the first legally binding international treaty on data protection. Key Details for 2026: Purpose: To promote best practices →
Here is an overview of the electrical outlets around the world in table format and drawing of different outlet types. The grounding contacts are marked to the picture with green arrows. Type Common Countries Nominal Voltage Grounded A USA, Canada, Mexico, Japan 100–127 V No B USA, Canada, Mexico 100–127 V Yes C Europe, South →
In the tech world, there is a constant flow of changes and keeping up with them means the choice for tools and technologies which are the most appropriate to invest your time in. In 2026 the best programming language or technology stack to learn really depends on your personal aims, hobbies, and apps you are →