Carlos wrote:
......
>By the way, you are right. The minimum on-resistance of analog mux, or
switching arrays is too high (about 100 ohms), so I will get in trouble
using them.
>The next posible solution I think is using transistors, but I'm not happy
with so many transistors in a board. There are transistors arrays out there,
but 4 or 5 per
>package, so it's the same problem.
>With all this, I understand why other people use adapters for each device,
but I don't like it. So, now, I don't know how to handle this problem, but
using jumpers to
>select the source of each pin... :-(


Carlos, you are beginning to see the basic engineering problems involved
with this kind of "universal" design. Somewhere I have a databook with pin
drivers described - I will try to find it and tell you how they do the
low-R buss connection trick.

best regards,
- dan michaels
www.oricomtech.com
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