add picture for arduino placement

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

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 2364250c7785f1185ecba9fa10116fee369ff18b..aae56ec9e49d5bbd222448f34b74b8e9b80cb708 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -36,15 +36,17 @@
                 (image :file "arduino-to-deck/3-place-arduino.png"))
         [here's a closeup]
         (figure :legend "arduino to deck / place arduino closeup"
-                (image :file "arduino-to-deck/4-place-arduino-closeup.png"))
-        [the arduino should line up with the holes on the deck.
-             place the arduino's top edge along the underside of the
-             deck's holes closest to the edge of the deck.
-             on the arduino, there's a hole on the top left.
-             that hole should be mid-way between two of the holes in the
-             grid of holes on the deck.
-             put the arduino hole between the third and fourth holes
-             from the left side of the deck.]))
+                (image :file
+                       "arduino-to-deck/4-place-arduino-closeup.png"))
+        [the picture above shows where to place the arduino on the deck.
+             the arduino should line up with the holes on the deck.
+             this alignment line is highlighted in pink.
+             on the arduino, there's a hole on the top left, between the
+             orange reset button and black headers.
+             the green circle shows where the hole is.
+             the blue box encloses the arduino hole and two deck holes.
+             place the arduino hole mid-way between the two
+             deck holes.]))
     (subsubsection
      :title [drilling]))
    (subsection