X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=9f613bf32c91f54072f0ea3bbe0886f1929f1c3a;hb=59fef21266ddb39e270c0a17612944a47c2f3b47;hp=1afa7e98925be156c8c60e1825a61aee2800f4e2;hpb=c3e8314cb0c7a44a39f2c8039c2037abad6cbc2d;p=challenge-bot

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 1afa7e9..9f613bf 100644
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -10,7 +10,67 @@
    (subsection
     :title [arduino placement])
    (subsection
-    :title [first hole and screw])
+    :title [first hole]
+    (subsubsection
+     :title [choosing drill bit])
+    (subsubsection
+     :title [inserting drill bit])
+    (subsubsection
+     :title [holding drill])
+    (subsubsection
+     :title [drilling]))
+   (subsection
+    :title [first screw]
+    (subsubsection
+     :title [fastening arduino to deck using ,(it [#6-32x3/8\"]) screw]
+     (p [the ",(it [#6])" part of ",(it [#6-32x3/8\"])" is how big
+             around the bolt is.  it is related to wire gauge.  bigger
+             numbers mean larger screw. smaller numbers means smaller
+             screws.])
+     (p [,(bold [check])
+         ,(itemize
+           (item
+            [in the motor assembly, there are ,(it [#4-40x1.25\"])
+                screws.  are those fatter, thinner, or the same
+                thickness as the ,(it [#6-32x3/8\"]) screws?]))])
+     (p [the ,(it [32]) part is a measurement of how close the threads
+             are to each other.  this is related to the angle of the
+             thread, which is also called ,(it [pitch]).  it is a count
+             of how many times the thread wraps around one inch of the
+             screw body.])
+     (p [the ,(it [head]) is the flat part where some tool, like the
+             alan wrench, can exert force to spin the screw.])
+     (p [,(bold [check])
+         ,(itemize
+           (item [how many times will the thread wrap around the
+                      one inch of the screw body?])
+           (item [what about 2 inches?]))]))
+    (subsubsection
+     :title [fasten the arduino board to the deck]
+     (p [push the 6-32 screw into the deck from the underside and at the
+              same time, spin the 6-32 screw clockwise while looking
+              down on its head.  twist until the bottom of the screw is
+              about to stick out on the top side of the deck.])
+     (p [hold the arduino board flat to the deck and line up the arduino
+              hole so the screw can come up through it.  continue
+              tightening the screw into the deck, spinning the same
+              direction as before.  tighten until the screw head touches
+              the deck.  do not continue tightening])
+     (p [the arduino should still be flat against the deck still, just
+             as it was before tightening the screw.]))
+    (subsubsection
+     :title [assessment]
+     (p [does the arduino stay with the deck when the deck moves?
+              can the arduino board still rotate a few degrees?
+              warning, if you rotate the arduino board too much, you
+              will unscrew it from the deck and you'll have to screw it
+              back in.  rotating a few degrees should be ok.]))
+    (subsubsection
+     :title [arduino board move relative to deck]
+     (p [without any screws, the arduino board can move independently of
+                 the deck.])
+     (p [with the first screw, the arduino can rotate around one point
+              on the deck.])))
    (subsection
     :title [second hole and screw])
    (subsection
@@ -68,7 +128,9 @@
    (subsection
     :title [cable])
    (subsection
-    :title [arduino headers]))
+    :title [arduino headers])
+   (subsection
+    :title [sound cm per microsecond at sea level]))
   (section
    :title [both sonars]
    (subsection