On Tue, 12 Jun 2018 21:23:25 +0100, mm0fmf  declaimed the
following:

>
>When my meter leads are unconnected the meter registers 0V. Does that
>imply both leads are also at 5V?

 No... Only that both are at the same potential... And unless the RPi is
seriously damaged, one can probably assume that the 5V pin IS at 5V, so a
0V differential means the GPIO is also at 5V.


--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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