Difference between revisions of "EGR 224/RC Lab"

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The following page provides some supplemental information for the '''RC Circuits and Filtering''' lab for [[EGR 119|EGR 119L]].  It has been updated to Spring, 2010.
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The following page provides some supplemental information for the '''RC Circuits and Filtering''' lab for [[EGR 224|EGR 224L]].  It has been updated for Spring, 2019.
  
 
== Clarifications ==  
 
== Clarifications ==  
* <strike>The sample rates need to be set to 1000 Hz or less; this change was detected and fixed during Section 1.</strike> We were able to "fix" the configuration files between Sections 1 and 2. Section 1 people will thus have different sampling rates from other sections.
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* If any of your figures looks wrong, it probably is!  Be sure to have a TA check your figures so that you leave the lab with a valid data set.
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* Use MATLAB on the PC to do the data acquisition
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* For newer versions of MATLAB (2015 and after), the proper way to get out of a "keyboard" environment is to type the word "dbcont" and hit enter; the word "return" no longer works for that
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* For Maple, when you put in the sinusoid at 60 rad/s, Maple may try to be "helpful" and use double angle formula to come up with a result that is a complete mess; try a frequency of 60.01 rad/s instead.  It's just about the same speed and Maple won't be...helpful...
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* The experimental phase values should track well at low frequencies but may fluctuate a bit at higher frequencies due to inaccuracies in determining peaks.
 +
 
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== Element Values ==
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*Resistances:
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**1, 9, 17: 2.2 k<math>\Omega</math>
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**2, 3, 10, 11, 18, 19: 4.7 k<math>\Omega</math>
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**4, 5, 12, 13, 20, 21: 10 k<math>\Omega</math>
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**6, 14, 16, 22: 15 k<math>\Omega</math>
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**7, 8, 15, 23, 24: 22 k<math>\Omega</math>
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*Capacitances
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**7, 15, 23: 2.2 <math>\mu</math>F
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**4, 6, 8, 12, 14, 16, 20, 22, 24: 4.7 <math>\mu</math>F
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**2, 5, 10, 13, 18, 21: 10 <math>\mu</math>F
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**1, 3, 9, 11, 17, 19: 22 <math>\mu</math>F
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<!--*Resistances:
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**1, 2, 3, 13, 14, 15: 1 k<math>\Omega</math>
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**4, 5, 6, 16, 17, 18: 2.2 k<math>\Omega</math>
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**7, 8, 9, 19, 20, 21: 4.7 k<math>\Omega</math>
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**10, 11, 22, 23: 10 k<math>\Omega</math>
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**12, 24: 15 k<math>\Omega</math>
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*Capacitances
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**7, 10, 12, 19, 22, 24: 1 <math>\mu</math>F
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**4, 8, 11, 16, 20, 23: 2.2 <math>\mu</math>F
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**1, 5, 9, 13, 17, 21: 4.7 <math>\mu</math>F
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**2, 6, 14, 18: 10 <math>\mu</math>F
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**3, 15: 22 <math>\mu</math>F
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-->
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== Links ==
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* The [[MATLAB:Transfer Functions]] page should be very helpful here.
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* The files for this assignment can be downloaded from [http://classes.pratt.duke.edu/FILES/EGR224/DAQS/RCfilter http://classes.pratt.duke.edu/FILES/EGR224/DAQS/RCfilter]
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* See [[Transferring_Files]] for information on how to get the files to your CIFS space.
  
 
== Wiring Images ==
 
== Wiring Images ==
[[Image:EGR119 RCLab Closeup.jpg|thumb|Closeup of the breadboard]]
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<gallery>
[[Image:EGR119 RCLab CBCloseup.jpg|thumb|Closeup of the [[MATLAB:CB-68LP_Pinout|CB-68LP]]]]
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File:EGR119 RCLab Closeup.jpg|Closeup of the breadboard
Click on the pictures at right to make them larger.
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File:EGR119 RCLab CBCloseup.jpg|Closeup of the [[MATLAB:CB-68LP_Pinout|CB-68LP]]
 
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</gallery>
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Click on the pictures above to make them larger.
  
[[Category:EGR 119]]
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== Voltage Images ==
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<gallery>
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File:Data 0001 12 clean.jpg|Clean graphs indicating good wiring
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File:Data 0001 12 fuzzy.jpg|Fuzzy graphs indicating wiring problems
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</gallery>
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[[Category:EGR 224]]

Latest revision as of 18:35, 19 March 2019

The following page provides some supplemental information for the RC Circuits and Filtering lab for EGR 224L. It has been updated for Spring, 2019.

Clarifications

  • If any of your figures looks wrong, it probably is! Be sure to have a TA check your figures so that you leave the lab with a valid data set.
  • Use MATLAB on the PC to do the data acquisition
  • For newer versions of MATLAB (2015 and after), the proper way to get out of a "keyboard" environment is to type the word "dbcont" and hit enter; the word "return" no longer works for that
  • For Maple, when you put in the sinusoid at 60 rad/s, Maple may try to be "helpful" and use double angle formula to come up with a result that is a complete mess; try a frequency of 60.01 rad/s instead. It's just about the same speed and Maple won't be...helpful...
  • The experimental phase values should track well at low frequencies but may fluctuate a bit at higher frequencies due to inaccuracies in determining peaks.

Element Values

  • Resistances:
    • 1, 9, 17: 2.2 k\(\Omega\)
    • 2, 3, 10, 11, 18, 19: 4.7 k\(\Omega\)
    • 4, 5, 12, 13, 20, 21: 10 k\(\Omega\)
    • 6, 14, 16, 22: 15 k\(\Omega\)
    • 7, 8, 15, 23, 24: 22 k\(\Omega\)
  • Capacitances
    • 7, 15, 23: 2.2 \(\mu\)F
    • 4, 6, 8, 12, 14, 16, 20, 22, 24: 4.7 \(\mu\)F
    • 2, 5, 10, 13, 18, 21: 10 \(\mu\)F
    • 1, 3, 9, 11, 17, 19: 22 \(\mu\)F

Links

Wiring Images

Click on the pictures above to make them larger.

Voltage Images