X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=c076dd9df6cf04827988b71e67538b56f21c7c30;hb=85fae63f5c8137998cbce03e2e17ccd919f2cae9;hp=aae56ec9e49d5bbd222448f34b74b8e9b80cb708;hpb=0b5cd84e95a2e84696afc5aa844bdf64a5ae4dc6;p=challenge-bot

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index aae56ec..c076dd9 100644
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -11,7 +11,7 @@
     :title [required materials]
     (p [you will need the things in this picture.
             ,(figure :legend "arduino to deck / required materials"
-                    (image :file "arduino-to-deck/0-required-materials.png"))
+                     (image :file "arduino-to-deck/0-required-materials.png"))
             ,(itemize
               (item [medical kit with bandages])
               (item [safety goggles])
@@ -24,17 +24,48 @@
    (subsection
     :title [first hole]
     (subsubsection
-     :title [choosing drill bit])
+     :title [choosing drill bit]
+     (p [choosing the right drill bit depends on what job you are doing.
+                  right now, we are making holes for screws to hold the
+                  arduino to the deck.
+                  this means the hole needs to be big enough for the
+                  screw body to fit through.
+                  we want the screw to stay put once it's in place.
+                  we also want the drill bit to be smaller than the
+                  diameter of the thread.
+                  the screw was chosen so that the hole on the arduino
+                  was bigger than the body and smaller than the thread.
+                  we will choose the biggest drill bit that fits through
+                  the hole on the arduino.])
+     (p [here's a cross section of a screw in the deck]
+        (figure :legend "screw cross section"
+                (image :file
+                       "arduino-to-deck/screw-cross-section.png"))))
     (subsubsection
-     :title [inserting drill bit])
+     :title [inserting drill bit]
+     (p (figure :legend "arduino to deck / insert bit"
+                (image :file "arduino-to-deck/1-insert-bit.png"))
+        [insert the drill bit into the teeth of the drill.
+                insert it far enough that the teeth will clamp on the
+                smooth part of the bit when they are tightened.])
+     (p (figure
+         :legend "arduino to deck / twist tighten drill teeth"
+         (image :file "arduino-to-deck/2-twist-tighten-drill-teeth.png"))
+        [while holding the drill bit, twist end of the drill to tighten
+               the teeth.
+               make sure that the teeth end up gripping the flat part of
+               the drill bit.]))
     (subsubsection
-     :title [holding drill])
+     :title [holding drill]
+     (p [hold the drill with one hand on the handle and trigger.
+              put the other hand on the orange nozzle, before the
+              black spinning part.]))
     (subsubsection
      :title [arduino placement]
      (p [the arduino should be placed as shown in this picture.]
         (figure :legend "arduino to deck / place arduino"
-                (image :file "arduino-to-deck/3-place-arduino.png"))
-        [here's a closeup]
+                (image :file "arduino-to-deck/3-place-arduino.png")))
+     (p [here's a closeup]
         (figure :legend "arduino to deck / place arduino closeup"
                 (image :file
                        "arduino-to-deck/4-place-arduino-closeup.png"))