EGR 103/DAQ 2

This page contains pictures and graphs related to DAQ 2 for EGR 53. It has been updated for Fall, 2011.

Note About DAQ Cards

• DAQ 2-3: After you add two channels, you may receive the following:

Warning: This hardware could not support the requested value of 1000.00 for 
SampleRate. SampleRate has been set to 500.00.

Your program will still work, just slower. This is an issue with the drivers on some of the computers and does not represent a problem for this lab.

Circuit for BasicAOutput

Circuit layout for BasicAOutput.

Circuit for BasicAIO

Circuit layout for BasicAIO (two measurements).

Graph from BasicAIO

Graph showing outputs when

Vout0 = 2.5+2.5*sin(2*pi*k/100);
Vout1 = 2.5+2.5*cos(2*pi*k/100);

That is,

\( \begin{align} V_{out,\,0}=2.5+2.5\sin\left(\frac{2\pi k}{100}\right)\\ V_{out,\,1}=2.5+2.5\cos\left(\frac{2\pi k}{100}\right) \end{align} \)

Circuit for AIO

Circuit layout for AIO (six measurements).

Graph from AIO

Graph showing outputs from six measurement channels.

Codes

Pasting codes from PDF files is...a bad idea. Here are the text versions of some of the codes in the assignment.

Subplot Structure for Plotting Code

The code below includes the commands for the small greed LED assuming the variable names given in the code above.

subplot(3,2,1)
% small green plotting commands
plot(SmallGreenTotal, SmallGreenTotal, 'k-',...
     SmallGreenTotal, SmallGreenRes, 'k:',...
     SmallGreenTotal, SmallGreenLED, 'k--') 
title('Small Green LED')
grid on 

subplot(3,2,2)
% small red plotting commands

subplot(3,2,3)
% large green plotting commands

subplot(3,2,4)
% large red plotting commands

subplot(3,2,5)
% rect green plotting commands

subplot(3,2,6)
% rect red plotting commands

Example Commands to Parse Data Set for Small Green and Red LEDs

load SmallData
SmallGreenTotal = SmallVoltages(:,1);
SmallGreenRes   = SmallVoltages(:,2);
SmallGreenLED   = SmallVoltages(:,3);
SmallRedTotal   = SmallVoltages(:,4);
SmallRedRes     = SmallVoltages(:,5);
SmallRedLED     = SmallVoltages(:,6);

Questions

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