In Greece the standard mains power voltage is 230 V and frequency is 50 Hz. The power plugs and sockets are of type C and type F. I also saw some Type L (Italian) power oulets at hotel This is a somewhat strange looking extension cord. Thetr are somewhat strange looking outlets on this permanently →
I got few years ago this cheap USB powered mosquito trap. The idea in it is that Blue/UV light gets the mosquitos to go near the device, and then the device sucks them away. This product was cheap, but was not very effective. When I tried this device this summer, it did not seem to →
Mosquitos don’t just whine in your ear and drive you mad with itching, but they also spread disease to more than 700 million people every year. Mosquitoes are attracted to carbon dioxide as well as the warmth and humidity you’re giving off. There are many different types of mosquito repellent. From zappers to catchers to →
The trolley problem is a series of thought experiments in ethics and psychology, involving stylized ethical dilemmas of whether to sacrifice one person to save a larger number. Absurd Trolley Problems https://neal.fun/absurd-trolley-problems/ →
Venerable Ethernet provides the backbone of the internet. Ethernet has risen to complete dominance for local area networks over its forty years of existence. The first Ethernet experimentals versions started in 1972 (patented 1978). The commercialization of Ethernet started in 1980′s. At first Ethernet technology remained primarily focused on connecting up systems within a single →
I got an old HP mixed signal oscilloscope HP54645D. This is over 20 years old test instrument with CRT display. The 54645D is a 100 MHz, 2+16 channel Mixed Signal Oscilloscope from Agilent. Measure voltage or current signals over time in an electronic circuit or component to display amplitude, frequency, rise time, etc. Applications include →
Nowadays it is possible to buy passive and active device to run Ethernet over Coax – some products support data transfer over larger distances then you can get on regular Cat5. The passive converters are typically limited to 100 Mbps maximum speeds up to 100-200 meters distance maximum. If you need faster speed or longer →
Don’t do this! (There’s a much safer way) https://www.youtube.com/watch?v=M88e1r8nvYk Big Clive discovered there’s a “thing” going around where people are charging lithium cells by attaching a stripped USB lead directly to them. Normally lithium cells are very safe if undamaged and correct charging procedures are used. But overcharging them like this can result in cell →
This posting is here to collect cyber security news in July 2022. I post links to security vulnerability news to comments of this article. You are also free to post related links to comments. →