Resistor/Capacitor Test Model
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This board is simply six resistors and six capacitors in three different sizes of each.  Each component is connected to a pair of simple machine screw posts.  As described in Laboratory #6 of the BIO325 manual, students build and test simple RC circuits by connecting components with alligator clip leads, stimulating with a simple battery or square-wave electronic stimulator, and recording voltage or current with a multimeter or PowerLab system.  As they progress through the lab students verify Ohm's Law and Kirchoff's Current Laws with resistors in series and in parallel, build and measure current-divider and voltage-divider resistor circuits, build and test a simple RC model of the cell membrane, measure and calculate capacitive time constants, then build and test high- and low-pass RC circuits (a.k.a. frequency-dependent voltage dividers).   Printouts of the results of using this model as described in laboratory #6 are available online in a poster (PowerPoint format) or upon request from brhoades@wesleyancollege.edu .