[simpits-tech] Whats happenin?

[Per Eriksson]

>
>
> Right now I'm chasing a damn weird oddity with my Gazoutta16 board.
> Turning channel 8 on activates channels 1-7 as well.  The weird thing is,
> my logic probe tells me that only the 8th input on the ULN2803 has gone
> high.  The only thing I have left to test is the ribbon cable.  This is
> weird because it happens to both the prototype and one of the production
> boards.  I've checked it with a multi-meter and there's no errors on the
> board.  It's enough to drive me even crazier. :)


Butting in: Did you accidentally connect the flyback diodes pin to the 8th
output? That would behave that way, sort of. Of course, you'd have had to
leave that pin unconnected in the design, or at least not connected to the
power supply positive.

Just a quick thought...
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