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The shocking power supplies

Transformerless power supplies are showing up a lot, especially in inexpensive products where the cost of a transformer would add significantly to the BOM. But transformerless power supplies are a double-edged sword. You can get yourself easily electrocuted if you don’t understand them and take proper safety precautions. Poking around in a transformerless-powered device can

Millenium DI-E teardown

Millenium DI-E is a DI Box. It is pretty much the cheapest (around 12 Euros) DI box you can find that still does it’s job acceptably. The unit is passive and has ground and ground lift. IT allows you to select to use the input with either an instrument or speaker level signal. Here is

Friday Fun: thirsty mixers

The mixers in question are Panasonic WJ-MX50 Video Mixers. The picture was taken on Assembly Computer festival many years ago. The beer and cider taps were not operational when the place was used as video control room. The two video mixers were used in the application because one was producing material to the projection screen

USB charger with solar cell

Here is tear-down view of the following USB charger: SilverCrest SPBS 5000 B2 Battery: 3.7V 5000 mAh 18.5Wh Input: 5V 2100 mA Output: 5V 2100 mA Manufactured 2018-10 It was sold by LIDL. This device has a built-in battery that can be charged with other USB charger or with built-in solar panel. Here is a

Blinking Cursor Turns 54

Blinking Cursor Turns 54, Hardly Anyone Notices The article purports that the Apple II was the first place the general public would encounter the invention. We guess it depends on how you define the general public. The VT50 had a blinking cursor. Regardless, the invention has stood the test of time. Humans are adept

Friday Fun: 2021 Information security in memes

Remember the most interesting events of the information security industry in 2021 in memes and tweets and fairy tales. 2021 Information security in memes and tweets Hans Christian Andersen on security technologies

Tech trends 2022

The year 2021 was strange, you can read more of it from A 2021 technology retrospective: Strange days indeed. But how strange will 2022 be? Here are some predictions for year 2022: 2022 preview: Will the global computer chip shortage ever end? The growing demand for computer chips, used in everything from cars to fridges,

CES 2022

The Consumer Electronics Show, or CES, is held every year in Las Vegas. CES 2022 doesn’t officially start until Wednesday, but the news is already trickling in. CES® 2022: The Countdown Is On. Over 2200 exhibitors are confirmed to exhibit in person at CES 2022. CES 2022 in-person exhibitor list had shrank lately with some

Cyber security trends for 2022

Nothing is more difficult than making predictions. Instead of trowing out wild ideas what might be coming, I have collected here some trends other people have predicted or reported. Why the Future Needs Passwordless Authentication As of September, Microsoft users no longer have to rely on passwords when logging in to their accounts. Passwords