Steve, the 4067 multiplexer/demultiplexer is even better and only $2.08CAD at DigiKey.
The only problem is that I don't understand how to get it to go 'backwards'. The A0-3 pins are always referred to as inputs, I need them as outputs. I'm sure there's a way 'cause these are called both names, they must process both ways, no?
Robert
EDIT: "The CD74HC4067 and CD74HCT4067 devices are digitally
controlled analog switches that utilize silicon-gate CMOS
technology to achieve operating speeds similar to LSTTL,
with the low power consumption of standard CMOS
integrated circuits.
These analog multiplexers/demultiplexers control analog
voltages that may vary across the voltage supply range.
They are bidirectional switches thus allowing any analog
input to be used as an output and vice-versa. The switches
have low “on” resistance and low “off” leakages. In addition,
these devices have an enable control which when high will
disable all switches to their “off” state."
It should work.
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