Archive for August 2021

XLR Mic cable tester with one LED

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.

Lutron LCR-9063

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

30 years of Linux

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.”

Right to Repair in Europe

“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

Electrical meter hacking

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

CEEFORM Connectors

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called Commission internationale de réglementation en vue de l’approbation de l’équipement électrique, which is now superseded by IECEE.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

SH-666 microphone

The microphone of the beast? Depends on the culture. We’ve all heard about the infamous number 666, which is rather cryptically referred to as the “number of the beast” in the New Testament, and has more recently become known as the number of the Antichrist. In the Bible, 666 is also the number of talents

DOS at 40

This day in history August 12,1981, MS-DOS is released. Now you know. MS-DOS is an operating system for x86-based personal computers mostly developed by Microsoft. Default user interface: Command-line (COMMAND.COM), text (DOS Shell) Final release: 8.0 (Windows Me) / September 14, 2000; 20 years ago Initial release date: 1981 Source model: Closed source; open source