Newsgroups: comp.robotics
Path: brunix!news.Brown.EDU!qt.cs.utexas.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!decwrl!adobe!epperson
From: epperson@adobe.com (Mark Epperson)
Subject: Re: A sense of balance
Message-ID: <1993Feb1.213330.22026@adobe.com>
Sender: usenet@adobe.com (USENET NEWS)
Organization: Adobe Systems Incorporated
References: <20400@mindlink.bc.ca>
Date: Mon, 1 Feb 1993 21:33:30 GMT
Lines: 16

In article <20400@mindlink.bc.ca> Jeff_Holinski@mindlink.bc.ca (Jeff Holinski) writes:
>
>If you can't get the liquid to work with optical sensors you might try using
>a drop of mercury and speaker wire. You carve the groove in the plexiglass,
>lay strands of speaker wire from the groove to outside the block of
>plexiglass. Put a drop of mercury into the groove and coat another piece of
>plexiglass with epoxy and clamp the 2 pieces together. The epoxy will seal
>the unit and hold the wires in place and the mercury will make a connection
>between ajacent pieces of wire.

What about having w paralell wires made from some high-resistance material
and have a drop of mercury short them.  Then you could just measure the
resistance (voltage) using an ADC?

Mark Epperson

