Archive for January 2024

Parkside Electromagnetic Field Detector PEM A1

Have you ever wondered about how safe your place or position is regarding electromagnetic and magnetic fields? An EMF meter is a scientific instrument for measuring electromagnetic fields (abbreviated as EMF).EMF meters measure fluctuations in electromagnet fields. Measurements of the EMF are obtained using an E-field (electrical field) sensor or H-field sensor (magnetic field). I

AC power frequencies

There are two widely used mains power frequencies for alternating current: 50 Hz and 60 Hz. Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency. But there are also other frequencies used for power. But

Sinclair QL is 40 years old

40 years since Sinclair QL was released. And what a weird machine it was. I did not own one, but a friend had one. How Sinclair’s QL computer outshined Apple’s Macintosh against all odds Compatible hardware and peripherals are still on sale, four decades after its launch. Two weeks before Apple launched the Macintosh,

Remember Spectre and Meltdown

Here is an overview of Spectre and Meltdown vulnerabilities that got a lot of publicity in January 2018. Meltdown and Spectre the two original transient execution CPU vulnerabilities. The Meltdown and Spectre vulnerabilities were considered “catastrophic” by security analysts. The vulnerabilities are so severe that security researchers initially believed the reports to be false. In

Telephone cards hacking history

Who remembers Phone booths and above all phone cards? Phone cards were a technological advance in the world of public telephone traffic in the 1990s. They allowed to make calls on many phone booths in Finland and phone cards were also a popular collector’s item, collected both used and unused: Telecom companies have placed advertising

TTL logic is 60 years old

Transistor–transistor logic (TTL) is 60 years old this year based on the following article (Wikipedia claims this happened already in 2023). TTL became the foundation of computers and other digital electronics. TTL integrated circuits (ICs) were widely used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, and synthesizers. The 7400

Erratic touchscreen behavior

Ghost touches on a touchscreen occur on smart phones and tablets when the screen registers touches or taps without any actual input from the user. This issue can be frustrating, but there are several potential reasons and solutions for it: Screen Calibration: Check if your device has a screen calibration option in the settings. Calibrate

Blue Screen of Death to Linux

It might not be the year of the Linux desktop yet, but Linux distributions will soon have their own Blue Screen of Death message. Windows’ infamous “Blue Screen of Death” (BSOD) is a bit of a punchline. People have made a hobby of spotting them out in the wild, and in some circles, they remain