CPS-Lab* / Mbed 2 deprecated labseven

Dependencies:   ADXL362 Lab7 mbed

Revision:
2:1dab962fe6f0
diff -r ed3c12662b08 -r 1dab962fe6f0 report.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/report.txt	Wed Feb 07 22:47:01 2018 +0000
@@ -0,0 +1,38 @@
+
+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.
\ No newline at end of file