[simpits-tech] Using real instruments

[Gene Buckle]

> Ok, I bought the Altimeter.  I took it apart(a delicate task).  It could
> definitely be driven by vacuum, but I'm going to try to modify it to be
> driven by pressure.  The ASTEK meter I have works by the expansion of two
> sealed metal bellows expanding as the atmospheric pressure decreases at
> higher altitudes.  I'm going to drill a hole in each bellows, port them, and
> try pressurizing the bellows.  In theory this will be equivalent to applying
> a vacuum to the outside.  If it works I'll post pics of the results.
> Otherwise...anyone interested in a ruined Altimeter? :)
>
You might also think about connecting a servo to the bellows and moving it
that way.

g.