add wheels to motors

diff --git a/guide/5-wheel-to-robot-assembly.ogv b/guide/5-wheel-to-robot-assembly.ogv
new file mode 100644 (file)
index 0000000..7b679dc
Binary files /dev/null and b/guide/5-wheel-to-robot-assembly.ogv differ

diff --git a/guide/challenge-bot.scm b/guide/challenge-bot.scm
index 9ea816f7dc8eb1a972b7dabf0a1b87a027a568f5..84bbeb678210bc757358ac62d5237a4f2327c756 100644 (file)
--- a/guide/challenge-bot.scm
+++ b/guide/challenge-bot.scm
@@ -578,10 +578,18 @@
     (item [what would happen if the robot did not have a caster?])))
   (section
    :title [wheels]
-   (subsection
-    :title [tread])
-   (subsection
-    :title [motor]))
+   (p [now we will attach the wheels.
+           this makes the motor movement transform into robot movement!])
+   (figure
+    :legend "wheel"
+    (video :file "5-wheel-to-robot-assembly.ogv"))
+   (p [check])
+   (enumerate
+    (item [does the robot's wheels scrape the deck?])
+    (item [what would happen if the robot had no wheels?])
+    (item [what does the tread do?])
+    (item [what is  the tread?])
+    (item [what kind of screw is used?])))
   (section
    :title [sonars]
    (subsection