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Re: Pi power

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On 06 Jan 2021 at 12:10:01 GMT, Andy Burns <usenet@andyburns.uk> wrote:

> TimS wrote:
> 
>>  Andy Burns wrote:
>>  
>>>  What's relevant is that your monitor shouldn't be reverse feeding 5V to
>>>  the Pi
>>  
>>  Agreed, if that's what its doing. Could be the other Mini, I suppose. I'll
>>  have to do some more testing.
> 
> Wouldn't be the biggest surprise in the world if the a cheap switch box 
> just commoned all the 5V pins together (since it can act as either a 2>1 
> or 1>2 device, it'll be dumb).

Are these 5V signal or power? From what Joe said upthread, both ends need to
see the other. A 5V signal should suffice for that, I would have thought. No
need for the source to be offering to power the remote end.

> But a source HDMI device is expected to protect itself from an 
> unexpected 5V arriving into its output, so no harm "should" occur.

A diode would suffice.

-- 
Tim

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Pi power Tim Streater <timstreater@greenbee.net> - 2021-01-05 22:54 +0000
  Re: Pi power Andy Burns <usenet@andyburns.uk> - 2021-01-05 23:16 +0000
    Re: Pi power "Mayayana" <mayayana@invalid.nospam> - 2021-01-05 19:59 -0500
      Re: Pi power A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-06 07:31 +0000
        Re: Pi power "Mayayana" <mayayana@invalid.nospam> - 2021-01-06 08:18 -0500
        Re: Pi power jornws200602@xs4all.nl (Oscar) - 2021-01-06 14:02 +0000
    Re: Pi power mjb@signal11.invalid (Mike) - 2021-01-06 09:44 +0000
      Re: Pi power Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 10:31 +0000
        Re: Pi power Tim Streater <timstreater@greenbee.net> - 2021-01-06 10:44 +0000
          Re: Pi power Joe <joe@jretrading.com> - 2021-01-06 11:03 +0000
      Re: Pi power Tim Streater <timstreater@greenbee.net> - 2021-01-06 10:32 +0000
        Re: Pi power Andy Burns <usenet@andyburns.uk> - 2021-01-06 10:57 +0000
          Re: Pi power TimS <timstreater@greenbee.net> - 2021-01-06 11:44 +0000
            Re: Pi power Andy Burns <usenet@andyburns.uk> - 2021-01-06 12:10 +0000
              Re: Pi power TimS <timstreater@greenbee.net> - 2021-01-06 13:25 +0000
                Re: Pi power Andy Burns <usenet@andyburns.uk> - 2021-01-06 14:41 +0000
                Re: Pi power TimS <timstreater@greenbee.net> - 2021-01-06 15:17 +0000
                Re: Pi power Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 16:05 +0000
                Re: Pi power TimS <timstreater@greenbee.net> - 2021-01-06 16:14 +0000
        Re: Pi power A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-06 12:02 +0000
      Re: Pi power Andy Burns <usenet@andyburns.uk> - 2021-01-06 10:55 +0000
        Re: Pi power Chris Green <cl@isbd.net> - 2021-01-06 11:19 +0000
          Re: Pi power Axel Berger <Spam@Berger-Odenthal.De> - 2021-01-06 13:13 +0100
            Re: Pi power Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-06 12:47 +0000
              Re: Pi power Joe <joe@jretrading.com> - 2021-01-06 20:20 +0000
                Re: Pi power druck <news@druck.org.uk> - 2021-01-06 20:43 +0000
              Re: Pi power Eli the Bearded <*@eli.users.panix.com> - 2021-01-06 23:08 +0000
                Re: Pi power Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-07 07:40 +0000
                Re: Pi power Axel Berger <Spam@Berger-Odenthal.De> - 2021-01-07 09:08 +0100
                Re: Pi power John Aldridge <jpsa@cantab.net> - 2021-01-07 09:20 +0000
                Re: Pi power The Natural Philosopher <tnp@invalid.invalid> - 2021-01-07 08:16 +0000
                Re: Pi power druck <news@druck.org.uk> - 2021-01-07 09:53 +0000
                Re: Pi power Martin Gregorie <martin@mydomain.invalid> - 2021-01-07 12:40 +0000
                Re: Pi power Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-07 19:29 +0000
                Re: Pi power David Higton <dave@davehigton.me.uk> - 2021-01-07 21:05 +0000
          Re: Pi power Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-06 12:39 +0000
            Re: Pi power Chris Green <cl@isbd.net> - 2021-01-06 17:04 +0000
              Re: Pi power Theo <theom+news@chiark.greenend.org.uk> - 2021-01-06 18:02 +0000
          Re: Pi power Theo <theom+news@chiark.greenend.org.uk> - 2021-01-06 16:41 +0000
            Re: Pi power Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 17:04 +0000
              Re: Pi power druck <news@druck.org.uk> - 2021-01-06 18:50 +0000
                Re: Pi power Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 20:39 +0000
            Re: Pi power TimS <timstreater@greenbee.net> - 2021-01-06 18:58 +0000
  Re: Pi power Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-08 22:33 -0500
    Re: Pi power Anssi Saari <as@sci.fi> - 2021-01-09 12:03 +0200

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