ask about drill bit sizes for arduino to deck

diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
new file mode 100644 (file)
index 0000000..c7ce82a
--- /dev/null
+++ b/guide/challenge-bot-questions.org
@@ -0,0 +1,14 @@
+* challenge-bot questions
+** mechanical questions
+*** arduino to deck
+    these questions are about attaching the arduino to the deck.  you used
+    a drill and drill bit to make holes for bolts to go through.  we
+    drilled through the arduino into the deck.
+    0. [@0] what would happen if you used a larger drill bit than the one
+       you used for drilling holes for the arduino?
+    1. why do people use drill bits that are smaller or the same size as
+       existing holes in circuit boards, like the blue arduino?
+    2. why did we use a drill bit that was wider than the body of the
+       bolt used to hold the arduino?
+    3. why did we drill through the arduino, rather than marking holes
+       and using the drill to make holes where the marks were?

diff --git a/guide/makefile b/guide/makefile
index 01f2d72dcfb642c32ce3d0a09d2d2389eda7c0a8..2ee17100bf9ccbccf4f65d34609252afd643b0b0 100644 (file)
--- a/guide/makefile
+++ b/guide/makefile
@@ -85,6 +85,9 @@ challenge-bot.html: challenge-bot.scm \
                makefile
        @skribilo $< > $@
 
+%.html:%.org
+       emacs --batch --visit $< -f org-html-export-to-html --kill
+
 clean:
        @rm -f \
                square.png \