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 →
What Is Braiding in Cables? Understanding Textile Braids, Shielding Braids, and Braided Conductors Cables come in many forms, and one of the most visually noticeable — and functionally important — design elements is braiding. But not all cable braiding serves the same purpose. Depending on the type, braiding can offer mechanical protection, electromagnetic shielding, or →
This posting is here to collect cyber security news in October 2025. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
Another bad and potentially dangerous circuit from Facebook. This is supposed to charge LiIon battery from USB power. Identified problems: – no current limiting – can overcharge the battery – red charging LED will be always on when there is USB power coming in – green charged LED will not turn on when battery is →
I don’t see any technical benefit of this cable construction for this application. – because there isn’t https://www.facebook.com/share/p/1CvWzJAZSN/ The reason is that it looks cool so people who don’t understand anything else will pay for it. So does he have mini pylons that he strings them across so that they don’t touch like they do →
Yesterday marked 34 years since Linus Torvalds, then a young computer science student, announced in the comp.os.minix newsgroup that he was working on a new operating system — “just a hobby, nothing big or professional like GNU,” as he put it. In hindsight, one of the most ironic understatements in tech history. The first Linux →
This posting is here to collect cyber security news in July 2025. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
Find 5 errors, missing details, dangers or warning on this circuit from https://www.facebook.com/share/p/18e7rDBUPh/ →
In the ever-dynamic and fast-moving world of semiconductors, why do some old transistors like 2N3904 and BC547 keep on going for decades? The 2N3904 and BC 547 transistor is still available as a newly manufactured device after 60 years of their introduction. The construction of the 2N3904 and 2N3906 in the mid.1960s represented a significant →
The semiconductor industry is experiencing rapid changes, ranging from the integration of artificial intelligence (AI) to the growing use of tariffs. The relentless march of artificial intelligence dominates headlines, powered by increasingly sophisticated silicon brains. In this narrative, chip designer Nvidia and manufacturer Taiwan Semiconductor Manufacturing Company (TSMC) have emerged as the undisputed leaders, seemingly →