it is much easier to poke into the breadboard.])
(p [check])
(itemize
- (item [why are we using a solid core wire?]))))
+ (item [why are we using a solid core wire?])))
+ (subsubsection
+ :title [solder]
+ (p [do this next section and the previous with just one lead at a
+ time.
+ solder the stranded wire and solid core wire, as shown
+ in this video.])
+ (figure :legend "batteries / prepare leads / solder"
+ (video
+ :file "2-batteries/0-prepare-leads/2-solder.ogv"))
+ (p [soldering is the process of joining 2 metal things with
+ solder.])
+ (enumerate
+ (item [use the helping hands to grab the wires and hold them in
+ place.])
+ (item [clean off the tip of the soldering iron if it has been
+ sitting still for a while.
+ this cleans off corroded metal.])
+ (item [apply some solder directly to the tip of the soldering
+ iron.
+ this creates a pool of solder on the tip.
+ we will use this to transfer heat to the wires.])
+ (item [put the soldering iron up to the wires.
+ we want the wires to be hot enough to melt the
+ solder.
+ at the same time, poke the solder into the wire.
+ the solder will start melting and quickly spread to
+ hot parts of the wire.
+ there will be smoke.])
+ (item [move the solder away, then move the iron away.]))
+ (p [check])
+ (itemize
+ (item [should the wires melt the solder?])
+ (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?])))
+ (subsubsection
+ :title [arduino battery pack attachment]
+ (p [attach the arduino battery pack to the robot deck.])
+ (figure
+ :legend "batteries / placement / arduino pack"
+ (video
+ :file "2-batteries/1-placement/1-arduino-battery-pack.ogv"))
+ (p [next, we will attach the arduino battery pack to the deck.
+ again, the pack could be placed anywhere, but we will
+ place it in the lower right side of the robot.])
+ (enumerate
+ (item [make sure you are placing dots on the side of the battery
+ pack without the on/off switch, just as before.])
+ (item [peel off a glue dot for each end of the pack.])
+ (item [when placing the battery pack, make sure the screw hole
+ aligns with a hole on the deck.]))
+ (p [check])
+ (enumerate
+ (item [why align the screw with a hole on the deck?])))))
(section
:title [motors]
(subsection
- :title [leads])
- (subsection
- :title [mount])
+ :title [leads]
+ (p [attach leads to the motors to supply the motor with power.])
+ (figure
+ :legend "motors / leads"
+ (video
+ :file "3-motor-assemblies/0-leads.ogv"))
+ (enumerate
+ (item [strip both the green and yellow wire on both ends.
+ strip one side only 1/8 inch.
+ strip the other side about 1/4 inch.])
+ (item [use the end of the wire stripper to bend a hook in the wire.
+ make this hook on the side of the wire with a smaller
+ exposed section.])
+ (item [do not bend the wire so that the exposed wire runs alongside
+ the sheath.])
+ (item [put the hooks through the tabs on the motor.
+ make sure to place the green and yellow wire on the
+ correct side of the motor.
+ match the side of the motor that already has wires
+ attached.
+ wrap the rest of the wire around the motor in order to
+ keep the wire from falling off.])
+ (item [once the wire is in place, wrap solder around the motor tab
+ and wire.
+ heat up the solder, motor tab and wire with the
+ soldering iron.])
+ (item [test the solder joint with the 9v battery.
+ touch the battery leads to the motor leads.
+ make sure the 9v battery is on.
+ if the motor moves, the solder joint is good!])
+ (item [get section of electrical tape, roughly 100mm
+ (about 4 inches).
+ slide the middle of the tape under the wires.
+ this tape will keep the solder joints away from the
+ metal band around the motor.])
+ (item [the zip tie will hold the wires to the motor.
+ wrap the zip tie on the round part of the motor where
+ it meets the square portion of the motor.
+ this will provide mechanical support for the solder
+ joints.
+ once the zip tie is wrapped, use wire strippers to cut
+ off the excess zip tie.])
+ (item [cover the solder joint with hot glue.
+ this will further keep the solder joints from corroding
+ in the air's moisture.
+ it will also keep the joint safe from anything poking
+ in.]))
+ (p [check])
+ (enumerate
+ (item [should the electrical tape go between the wires and the
+ metal band?])
+ (item [are the motor tabs strong?])
+ (item [what are we doing to reinforce the motor tabs mechanically?])
+ (item [does hot glue make an electrical connection?])))
(subsection
:title [deck attachment]))
(section
projects / challenge-bot / blobdiff