Electronics decoding of outputs

["Mick Furlong" <hiltoneltd@xxxxxxx>]

Ok the same Linux box mentioned in my previous email has 4 outputs which
are
relay based potential-free switch contacts. These are rated 1.5A at 230 V
AC
and 2A at 30VDC.

What I would like to do is to decode these outputs giving me 
additional
states (something similar to how frank is doing the HV/IR stuff I guess)
if
my math holds up I should be able to control 16 relays using combinations
of
the 4 signals.

Is it as simple as using a set of logic gates to do this?

Is there a solution on a chip ?

Any other help?

btw I am VERY rusty with my electronics....23 years rusty ....so go easy
on
me ;)

Thanks
Mick



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