On 5 February 2018 at 20:06, Chuck Guzis via cctalk <cctalk@classiccmp.org> wrote: > I have a similar gripe with barrel connectors, > which don't seem to enforce any standard at all regarding polarity or AC > vs. DC.
.. which led me to accidentally power a USB hub with 12V instead of 5V - the power supplies looked the same, had the same plug, and I couldn't read the tiny writing on the warts. That blew the nicest notebook PC I've ever found - I bought it in Japan at a special price, the normal price is out of my league. Since then I have bought a Dymo and, armed with a magnifying glass, went through all the chargers and warts I own and labelled them. Which I should have done *before* the accident of course. But what if there was some kind of standard for barrel connectors instead.. sigh.