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USB charger bad

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

Power cable snake oil

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

Linux is 34 years old

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

USA electronics trends 2025

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

Friday fun: Watch concrete dry

“Like watching paint dry” A new 24-hour television broadcast will let viewers in Finland watch concrete dry in real time. The concept combines construction science and slow television. A concrete slab has been cast with embedded moisture and temperature sensors. Betonilive joins a growing list of popular livestreams in Finland, such as Pentulive (puppy cam)

Networking trends 2025

Ethernet recently celebrated its 50th anniversary as the most widely deployed technology for enterprise network connectivity. Ethernet switches: 2024 was a difficult year for Ethernet Campus Switch sales, with a 20 percent contraction compared to record revenues in 2023. The market is expected to rebound in 2025 and beyond, fueled by refresh cycles and Wi-Fi