+ :title [first hole]
+ (subsubsection
+ :title [choosing drill bit])
+ (subsubsection
+ :title [inserting drill bit])
+ (subsubsection
+ :title [holding drill])
+ (subsubsection
+ :title [drilling]))
+ (subsection
+ :title [first screw]
+ (subsubsection
+ :title [fastening arduino to deck using ,(it [#6-32x3/8\"]) screw]
+ (p [the ",(it [#6])" part of ",(it [#6-32x3/8\"])" is how big
+ around the bolt is. it is related to wire gauge. bigger
+ numbers mean larger screw. smaller numbers means smaller
+ screws.])
+ (p [,(bold [check])
+ ,(itemize
+ (item
+ [in the motor assembly, there are ,(it [#4-40x1.25\"])
+ screws. are those fatter, thinner, or the same
+ thickness as the ,(it [#6-32x3/8\"]) screws?]))])
+ (p [the ,(it [32]) part is a measurement of how close the threads
+ are to each other. this is related to the angle of the
+ thread, which is also called ,(it [pitch]). it is a count
+ of how many times the thread wraps around one inch of the
+ screw body.])
+ (p [the ,(it [head]) is the flat part where some tool, like the
+ alan wrench, can exert force to spin the screw.])
+ (p [,(bold [check])
+ ,(itemize
+ (item [how many times will the thread wrap around the
+ one inch of the screw body?])
+ (item [what about 2 inches?]))]))
+ (subsubsection
+ :title [fasten the arduino board to the deck]
+ (p [push the 6-32 screw into the deck from the underside and at the
+ same time, spin the 6-32 screw clockwise while looking
+ down on its head. twist until the bottom of the screw is
+ about to stick out on the top side of the deck.])
+ (p [hold the arduino board flat to the deck and line up the arduino
+ hole so the screw can come up through it. continue
+ tightening the screw into the deck, spinning the same
+ direction as before. tighten until the screw head touches
+ the deck. do not continue tightening])
+ (p [the arduino should still be flat against the deck still, just
+ as it was before tightening the screw.]))
+ (subsubsection
+ :title [assessment]
+ (p [does the arduino stay with the deck when the deck moves?
+ can the arduino board still rotate a few degrees?
+ warning, if you rotate the arduino board too much, you
+ will unscrew it from the deck and you'll have to screw it
+ back in. rotating a few degrees should be ok.]))
+ (subsubsection
+ :title [arduino board move relative to deck]
+ (p [without any screws, the arduino board can move independently of
+ the deck.])
+ (p [with the first screw, the arduino can rotate around one point
+ on the deck.])))