add subsection for both sonars

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 6a3cf5132aa5f84ab97d59cbe9c78a8b9c1c08c0..33f54fcc8c337ee3933a4d51e63e92278cf4fce5 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -70,7 +70,10 @@
    (subsection
     :title [arduino headers]))
   (section
-   :title [both sonars])
+   :title [both sonars]
+   (subsection
+    :title [breadboard power rail]
+    (p [power rail can provide power to more than one device.])))
   (section
    :title [left motor])
   (section