Diff: report.txt

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-
-RESULTS:
-Our end results were fairly good in terms of expected output, given the difficulty
-of the task.  When looking at our results of 1V sine waves, We noted marked 
-decrease in output voltage of sine waves that had over 200Hz.  We also noted
-some decreases at all increasing frequencies from the initial 100Hz.  This is 
-evidence that our low pass filter is functioning differently than an ideal low
-pass filter.  
-
-Difficulties:
-We had huge difficutlies with creating a sinewave that had accurate amplitude 
-and frequency.  We eventually achieved this simply by taking several data points
-from inputs of 5 - 70 micro seconds in delay, with ouputs of frequency from 
-100Hz - 500Hz, in delay and using this data to create a function that would then 
-work in the reverse.  That is to say that we used the data points with frequency
-as an input and the wait time as an output to convert input frequencies to 
-wait times that the STM board would then use to output the correct frequencies. 
-This function was relatively accurate, and ended up being more accurate than the
-relatively simple and "exact" mathmatically correct function that converts 
-frequency to delta time.
-
-Expected vs Actual Results:
-Due to this somewhat "approximate" approach to creating the correct frequency, 
-we obviously had some differences in our actual results when compared to our 
-expected results.  Our generated function was most accuate at low voltages and low
-frequencies, often achieving less than 1% error in the 1V and 100Hz range.  When 
-using higher frequencies, the function would usually output a frequency that was 
-roughly 2-4% higher than our desired frequency.  The voltage output was a similar
-story, with 1V being almost perfect, while 3V was usually off by around 3-5%.  
-Because of these differences, and the nature of imperfect capacitors and resistors,
-our actual results when measuring our low pass filter were even further from
-the ideal results.  We did note marked decrease in the output strength of 
-frequencies over 200Hz, but not as sharp of decreases as expected.  We also 
-meausured a decrease in strength of the signal even when frequency was still below
-200Hz, which should only happen when very close to 200Hz.  These differences 
-must be attributed to many factors, the primary ones being slightly incorrect 
-voltage and frequency outputs, imperfect wires, resistor, and capacitors, and 
-some limitations in the measuring equipment.
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