I saw the following circuit design posted to Facebook. Source: https://www.facebook.com/share/p/1HuYVvXHcf/ What is wrong with this design: No isolation from mains, potentially electrocutes if you touch any part of exposed LED strip. The circuit will only give around 220V/30000ohms=0.00766.. mA current that can light one normal LED but not any long LED strip like shown →
Find 5 errors, missing details, dangers or warning on this circuit from https://www.facebook.com/share/p/18e7rDBUPh/ →
I saw this at Facebook at https://www.facebook.com/share/p/1YitRKKmxy/ Can burn loudspeaker and transformer due DC flowing Dc quite probably saturates transformer core-> lots of distortion and very little sound Even if works the transformer is expensive and limits sound quality Very low impedance sound input is less than 30 ohms – which means this circuit does →
This posting is here to collect cyber security news in June 2025. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
I saw this circuit at https://www.facebook.com/share/p/16HFEwzkcQ/ The diodes try to charge and discharge the mosfet gate based on static electricity of user touching. Depending on the amount of charge you happen have it might not work at all, might work or could fry the mosfet (they are static sensitive components). FETs are extremely vulnerable to →
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 →
This posting is here to collect cyber security news in May 2025. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
We rarely think about how essential and reliable electricity grids are until they fail. Today Spain, Portugal and parts of France hit by massive power outage. A nationwide power outage hit Spain and Portugal on Monday, leaving millions without electricity. In Portugal, official sources told domestic media that the outage, which hit around late morning →
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 →
Congratulations to the Shure Company, celebrating their 100th anniversary on April 25, 2025. S.N. Shure founds the Shure Radio Company in Chicago, Illinois, marking the beginning of a legacy in audio innovation. The name Shure has long been associated with quality, innovation, and a deep understanding of sound. Shure is best known of their microphones →