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C. Sample Calculations
In Lab 7, we calculated gamma from the potentiometer measurements by first measuring
the values for R1 and R2, and then, by adding these values together and plugging into the
following equation to solve for gamma.
In the prelab, we were also asked to calculate the value of the capacitor given other
values in the following equation. This equation for the overall oscillation frequency
represents the charging and discharging curve of the output of the circuit.
f = 1/T = 1/(2*ln((1+γ)/(1γ))*RC)
D. Discussion
In this lab, students were able to build a circuit involving a potentiometer, which acts as
two variable resistances with a constant total resistance. Using the potentiometer allowed
the student to get a handson feel for what the potentiometer does and how to adjust it to
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View Full Document control other circuit components. In this lab specifically, the potentiometer was adjusted
to synchronize the blinking LEDs to various frequencies. In this way, we were able to
determine the frequency of the flashing LEDs by simply turning the potentiometer in
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This note was uploaded on 02/16/2009 for the course ECEN 214 taught by Professor Su during the Fall '08 term at Texas A&M.
 Fall '08
 SU

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