From: W. Trevor King <wking@drexel.edu>
Date: Sat, 12 Nov 2011 22:44:31 +0000 (-0500)
Subject: Add slow_bend post.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=beac3e821f1147c35a3caa4bbcce14c429fcf3c0;p=mw2txt.git

Add slow_bend post.
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diff --git a/posts/slow_bend.mdwn b/posts/slow_bend.mdwn
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+++ b/posts/slow_bend.mdwn
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+[[!meta  title="slow_bend"]]
+
+In the course of my [[research|Thesis]], I've spend a good deal of
+time developing clean, Python interfaces to much of our lab equipment.
+I also tend to have strong opinions on the One True Way® to solve a
+problem.  This means that I occasionaly end up writing script to run
+other people's experiment, especially when they don't take all that
+much time to write.
+
+I wrote `slow_bend` for Liming Zhao, who was a postdoc in our lab
+from 2008 to 2010.  Liming coated one side of an AFM cantilever with a
+film of cellulose and used [[slow_bend.py]] (version 0.2) to monitor
+the cantilever deflection as he flushed in different buffers
+([paper]).  Unfortunately, the paper claims the data aquisition was
+carried out in LabView.
+
+`slow_bend` is not a complicated program; it polls analog input
+channels using [[pycomedi]] (and optionally reads temperatures using
+backends from [[pypid]]).  The polling continues until `slow_bend`
+recieves a [KeyboardInterrupt][].
+
+    $ slow_bend.py --version
+    0.4
+    $ slow_bend.py 0 3
+    #time (second)	chan 0 (bit)	chan 0 (volt)	chan 3 (bit)	chan 3 (volt)
+    1.81198e-05	34727	0.598001	39679	2.10925
+    4.00409	34956	0.667887	38033	1.60693
+    8.00408	35074	0.703899	36780	1.22454
+    12.0041	35041	0.693828	35814	0.929732
+    16.0041	34917	0.655985	35044	0.694743
+    ^C
+
+[paper]: http://dx.doi.org/10.1002/bit.22754
+[KeyboardInterrupt]: http://docs.python.org/library/exceptions.html#exceptions.KeyboardInterrupt
+
+[[!tag tags/code]]
+[[!tag tags/python]]