Circuit source: https://www.facebook.com/share/p/1HGut3uEAd/ This is a bad and dangerous design This is a dangerous design. There is potentially lethal voltage on those probe pins. ⚡️☠️ I strongly discourage to build this. Design problems – no isolation from mains – test probes and circuit being tested dangerous to touch – pointless filter coil in output – →
Here are some AI bullshit stamps →
If happiness were an Olympic event, the Nordic countries would be a guaranteed to fill spots on the podium. According to the latest edition of the World Happiness Report, the three happiest countries in the world are Finland, Iceland and Denmark. Finland was named the happiest country in the world for a record 9th time →
I saw this viral circuit in Facebook https://www.facebook.com/share/p/1EEBkqkNr3/ It is a working concept but bad viral implementation: That 100 ohm resistor will heat up and consume the battery quite quickly. The 100 ohms resistor is so low value that it can potentially damage the transistor because maximum allowed transistor base current is exceeded when alarm →
The second Friday the 13th of 2026 is here, a date synonymous with bad luck for the superstitious. Friday the 13th has a reputation as a day of bad luck mainly because two separate superstitions merged over time: fear of the number 13 and fear of Friday. When they combined, the date became especially ominous →
This is a viral class A amplifier from https://www.facebook.com/share/p/1MWzg9TXxc/ This is a classic “minimalist” single-ended Class A MOSFET amplifier. While it is praised for simplicity, it is inherently inefficient and prone to significant distortion. In this design, the MOSFET (IRF530) is always “on,” acting as a variable resistor that pulls current through the 15 ohms →
This posting is here to collect cyber security news in March 2026. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
I just read an interesting article How to Write a Good Spec for AI Agents article on using AI to write software. That article is pretty long, so I decided that a compact overview would be useful. I started to pick what I think was most important and decided to turn my notes/picks to this →
At CES’26 this year Donut Lab caused quite the furore when they unveiled what they claimed was the world’s first production-ready solid state battery, featuring some pretty stellar specifications. Since then many experts and enthusiasts in the battery space have raised concerns that this claimed battery may not be real, or even possible at all. →