CBL interfacing

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1 total messages Started by Phil Kline (Guest) Sun, 26 Feb 1995 15:35

#731

Author: Phil Kline (Guest)
Date: Sun, 26 Feb 1995 15:35

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  Just returned from a 2 day T3 regional conference (graphing calculators) in
Columbus,OH.  There were many excellent presentations involving activites
using the TI CBL interface in the physics classroom.  A session presented by
high school physics teacher Chris Brueningsen, who wrote the programs
that accompany the CBL manual, was extraordinary.

  He set up two sonic motion sensors, at rights to each other, so that their
sound patterns intersected at an "area" about a meter from each unit.  He
sampled the motion of a wooden dowel stick within the intersecting area.
Sampling for a period of 8 - 10 seconds, he moved the stick in such a
manner that letter "B" was traced out.   Each CBL unit thus captured the
motion of the dowel stick within its own dimension (X or Y).  Using a TI-82
graphing calculator and LCD panel, he then plotted the motion of the stick
along each dimension with respect to time, and, by plotting X vs Y, he
reconstructed the complex motion of the object.. the letter B.  Is was
incredible.  I am sure that lots of activities will spin off from this
approach.

Let's hear from those of you who have experimented with the CBLs. Would
like to know your reactions to the CBL's along with problems and success
stories.

Phil Kline
Mohawk HS
Sycamore, OH
pkline@nike.heidelberg.edu

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