Don't know how obvious this is to bu0836 users: if you don't need all
analog inputs, but could use some more digital ones, then you could
think about abusing an axis for switches:
v analog in
100k / 0 |
|--------######---------/ ----------|
| 200k / 1 |
|--------######---------/ ----------| pull down as necessary
+----| 400k / 2 |-------#######--------|
|--------######---------/ ----------|
| 800k / 3 |
|--------######---------/ ----------|
Of course, you should use resistors with low tolerance and high
temperature stability (MO), and you have to decode the resulting value
in the driver. Easy to do in fgfs. If the value corresponds to 1M, then
you know that switches 1 and 3 are closed. Of course, there's a limit
for how many bits you can reliably pack into an "analog value.
There are also rotary encoders with binary output, which can be used
in the same way.
m.
Disclaimer: I've never tried this. :-)
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