detail how to attach motor battery pack to deck

diff --git a/guide/2-batteries/1-placement/0-motor-battery-pack.ogv b/guide/2-batteries/1-placement/0-motor-battery-pack.ogv
new file mode 100644 (file)
index 0000000..e3b59c0
Binary files /dev/null and b/guide/2-batteries/1-placement/0-motor-battery-pack.ogv differ

diff --git a/guide/challenge-bot.scm b/guide/challenge-bot.scm
index 37eb8b7e960c21c1f383a8f1e69b09c3c812c885..0b2c48683d5170281b2c6962ecd0aca853bd0130 100644 (file)
--- a/guide/challenge-bot.scm
+++ b/guide/challenge-bot.scm
@@ -405,7 +405,35 @@
       (item [why should we clean off the tip of the soldering iron?])
       (item [why do we put more solder back on the tip of the iron?]))))
    (subsection
-    :title [deck attachment]))
+    :title [deck attachment]
+    (subsubsection
+     :title [motor battery pack attachment]
+     (p [attach the motor battery pack to the robot deck.])
+     (figure
+      :legend "batteries / placement / motor pack"
+      (video
+       :file "2-batteries/1-placement/0-motor-battery-pack.ogv"))
+     (p [we will use glue dots to attach the motor battery pack to the
+            deck.
+            the pack could be placed anywhere, but we will place it
+            in the lower left side of the robot.
+            this battery pack has 4 AA batteries in it.
+            each battery has 1.5 volts difference between the positive
+            and negative side.
+            the batteries are connected in series.
+            the total voltage difference for the whole battery pack is
+            the sum of the individual voltages, which is 6 volts.])
+     (enumerate
+      (item [make sure you are placing dots on the side of the battery
+                  pack without the on/off switch.])
+      (item [peel off a glue dot for each of the corners of the
+                  battery pack.])
+      (item [when placing the battery pack, make sure the screw hole
+                  aligns with a hole on the deck.]))
+     (p [check])
+     (enumerate
+      (item [why place the glue dots on the side of the battery pack
+                 without the on/off switch?])))))
   (section
    :title [motors]
    (subsection