I have wondered what the mysterious candy-box-like boxes that have appeared on bus stop signs in Helsinki Finland. HSL has installed at a total of about 1700 of this kind of boxes to bus and tram stops, as well as on buses and trams. They are also coming to metro stations. These small boxed are →
This posting is here to collect cyber security news in September 2021. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →
Here is my newest build: Microphone wiring tester. This tester will turn on LED when microphone wiring is OK and phantom power is turned on. If there is any common problem, LED will stay off. This circuit will detect ground connected to wrong pin, broken wires that make no contact and short circuit between wires. →
After I posted my plans for XLR cable tester to Facebook audio DUY group, there was discussion on similar circuits other people has made. Steve Smith wrote (put here with his permission): “If you’re into making your own stuff, this will show up any fault with a mic cable when connected to phantom power. Three →
Friday playlist: The best developer song ever https://www.facebook.com/groups/programming.jokes/permalink/2901933883390586/ →
I bought a Lutron LCR-9063 meter long time ago (expect around 20 years or more) to be able to measure value of coils and capacitors. I has worked well for me. What looks like the same meter are sold as VOLTCRAFT LCR-9063 Component tester. This meter is designed for measuring resistance, inductance and capacitance. LCR-9063 →
August 25th, 1991 That’s right, it’s been 30 years since 21-year-old Finnish student Linus Benedict Torvalds made his now-famous announcement on the day of August 25th, 1991, on the comp.os.minix news group, saying that he is working on a free operating system for 386(486) AT clones as a “hobby.” https://9to5linux.com/happy-30th-birthday-linux →
“People want everything to be a lot more repairable than it is now.” While there’s still a long way to go, advocates say, European thinking on the topic appears years ahead of that in the United States. Specifically, Europe’s new regulations demand that manufacturers of washing machines, dishwashers, refrigerators, and displays (including televisions) make spare →
There was an urban legend back in the days of mechanical electricity meters, that there were “lucky” appliances that once plugged in would make the meter go backwards. That was not practical. Even modern meters be fooled into doing strange things though, as a team at the University of Twente have demonstrated by making modern →
The CEE form, also known as CEEFORM, is an abbreviation of Certification of Electrotechnical Equipment. Ceeform is a certificate for electrical equipment. It was formerly published by a European body called Commission internationale de réglementation en vue de l’approbation de l’équipement électrique, which is now superseded by IECEE. The “cee” in ceeform socket and ceeform →