show more detail on 6-32 screw

[challenge-bot] / curriculum / challenge-bot.scm

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index e223eb8f24a12c404545340cc50a2e1f2ce8a7ef..cfba91061c5eba5b384142c5e48173480116e204 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -37,8 +37,10 @@
                   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 diagram of a screw]
-        (figure :legend "screw" (image :file "arduino-to-deck/screw.png"))))
+     (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]
      (p (figure :legend "arduino to deck / insert bit"
@@ -85,7 +87,10 @@
      (p [the "#6" part of "#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.])
+             smaller numbers means smaller screws.]
+        (figure :legend "arduino to deck / #6-32 screw"
+                (image :file
+                       "arduino-to-deck/6-32-screw.png")))
      (p [check
          ,(itemize
            (item