In Prelab 6, we were asked to convert 2Hz into beats per minute. This was done by
recognizing that 1 BPM is equal to 1/60 Hz. By setting up a simple proportion, you can
find that 2Hz = 120 BPM. In the second part of the prelab, in order to simulate the RC
circuit, values for R and C were chosen by plugging into the formula for the time
constant which was estimated by looking at the given figure and finding values for R and
C that fit. The equation for the time constant is
τ = RC
The value for τ was estimated by finding the voltage is 37.7% of Vmax and then finding
the amount of time that has passed when the signal is at this value on the waveform
graph.
In Task 2 and 3 of the procedure, we were asked to determine the time constant of the
signal. This was done using the same method as in the prelab. First, we calculated 36.7%
of the peak to peak voltage, and then found the time difference between these two voltage
levels. These calculations were simple multiplication and subtraction operations.
D. Discussion
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 SU
 heart rate, RC circuit, Heart rate monitor

Click to edit the document details