On Sat, Feb 23, 2019 at 11:11:18AM -0500, Michael Stone wrote: > On Sat, Feb 23, 2019 at 09:41:27AM -0500, rhkra...@gmail.com wrote: > >On Saturday, February 23, 2019 07:53:23 AM Pascal Hambourg wrote: > >>Le 23/02/2019 à 08:53, David Christensen a écrit : > >>> Understand that if you disconnect the power cable to a motherboard, > >>> drive, peripheral, etc., but not all the other cables (e.g. SATA cable), > >>> you can fry electronics. > >> > >>Right. This is why power pins are longer than data pins in plug&play > >>connectors, so that they are connected first and disconnected last. > > > >Hmm, that surprises me -- I guess I would have expected that you want the > >data > >pins connected first (while no power is applied), and disconnected last > >(again, > >while no power is applied). Interesting, > > You generally want ground connected first.
And Vcc before signal. Always. The order of ground and Vcc is actually not *that* critical (although if I had a choice, I'd start with ground). Cheers -- t
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