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Facebook post at https://www.facebook.com/groups/electronichobycircuits/permalink/3743513689006646/ advertises this circuit idea: Amazing Idea With Relay & BC547 Transistor https://techsawco.com/amazing-idea-with-relay-bc547-transistor/ I see this circuit much less than amazing. “This circuit is used as voltage level indicator and short circuit protection circuit.” Voltage level indicator idea is feasible. The “short circuit protection circuit” does not live up to the promises →

Having a VNA opens up so many possibilities for RF measurements. Typical measurements are antenna matching, RF filters, impedance matching and cable loss. But it an do more. You can use it even to measure the coaxial cable length – a task that is normally performed with time domain reflectometer (TRD), an instrument I have →

Bar code 1. a method of representing data in a visual, machine-readable form 2. Computer code written or designed at bar under influence of alcohol (possibly during Ballmer Peak moment) https://xkcd.com/323/ →

NanoVNA vector signal analyzer can be used also as an RF signal generator. If you are in a hurry and need a quick & square wave signal between 50 kHz and 300 MHz the NanoVNA can come to the rescue. Just set the centre frequency of the stimulus at the value you need and a →

This posting is here to collect cyber security news November 2020. I post links to security vulnerability news with short descriptions to comments section of this article. If you are interested in cyber security trends, read my Cyber security trends 2020 posting. You are also free to post related links to comments. →

CSS DMCA Song – Joe Wrecker This song came out in 1999 when somebody learned how to decrypt and DVD’s on Linux. The DMCA came out in 1998 making such things illegal. The DMCA makes it illegal to circumvent encryption, for any reason, without the encryptor’s permission. Many people viewed this as a violation of →

Best Ghost Hologram effect, Halloween 2015 DIY Halloween Props – Realistic Fake Fire Special Effects DIY Halloween Props – SUPER EASY Cemetery Fence! Halloween Pumpkin Topiary – Turn $1 Walmart pumpkins into this fall porch idea! | Hometalk Halloween Lightshow 2019 Projection Mapping Stranger Things Theme Halloween Light Show 2019 house Halloween projection map sample →

Data breach notifications have become an all-too-regular exercise in crisis communications that increasingly try to deflect blame, obfuscate important details and omit important facts. The next time you get a data breach notification, read between the lines. For instructions how to do that read How to decode a data breach notice article at https://tcrn.ch/2WMqUjm. Know →

One way to test electrolytic capacitors is to measure their capacitance. It does not tell the whole story of capacitor condition. Another usually more useful way to measure electrolytic capacitor condition is to use an ESR meter. Here is ESR meter I built years ago based on instructions from http://ludens.cl/Electron/esr/esr.html but I built the transformer →

Halloween is coming soon and you might think you need some scary/funny decoration for it. Here are some ideas. The following examples seem to be built with idea “If it’s worth doing, it’s worth overdoing.” Enter Sandman (Metallica) 2020 Halloween Light Show “Chop Suey” – System of a Down 2019 Halloween Light Show This is →