through.
we drilled through the arduino into the deck.
**** drilling
- 1. what would happen if you used a larger drill bit than the one
+ 1. what would happen if you used a larger drill bit than the one
you used for drilling holes for the 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 do people use drill bits that are smaller or the same size as
- existing holes in circuit boards, like the holes in the blue
- arduino?
- 4. why did we drill through the arduino, rather than marking holes
- and using the drill to make holes where the marks were?
- 5. how does the drill hold onto the drill bit?
- 6. what would happen if the drill bit teeth were not flat on the
- drill bit?
- 7. how can you break the drill bit when drilling?
- 8. should we drill at full speed?
- why or why not?
+ 2. why did we use a drill bit that was wider than the body of the
+ bolt used to hold the arduino?
+ 3. why do people use drill bits that are smaller or the same size as
+ existing holes in circuit boards, like the holes in the blue
+ arduino?
+ 4. why did we drill through the arduino, rather than marking holes
+ and using the drill to make holes where the marks were?
+ 5. how does the drill hold onto the drill bit?
+ 6. what would happen if the drill bit teeth were not flat on the
+ drill bit?
+ 7. how can you break the drill bit when drilling?
+ 8. should we drill at full speed?
+ why or why not?
**** bolts
- 1. the bolts used to attach the arduino are 6-32 bolts.
+ 1. the bolts used to attach the arduino are 6-32 bolts.
the bolts used to attach the motor to the motor mount are
4-40 bolts.
Are the 4-40 bolts fatter or thinner than the 6-32?
- 2. if you see a bolt described as =4-40x1.25=" how long is it?
- 3. on a =4-40= bolt, how many times does the thread wrap around
- one inch of the body?
- 4 times?
- 40 times?
- 1. how many times does the thread of a =4-40= bolt wrap around
- two inches of the body?
- 8 times?
- 40 times?
- 80 times?
- 4. what part of the screw does the screw driver go into?
+ 2. if you see a bolt described as =4-40x1.25=" how long is it?
+ 3. on a =4-40= bolt, how many times does the thread wrap around
+ one inch of the body?
+ 4 times?
+ 40 times?
+ 1. how many times does the thread of a =4-40= bolt wrap around
+ two inches of the body?
+ 8 times?
+ 40 times?
+ 80 times?
+ 4. what part of the screw does the screw driver go into?
+**** part placement
+ 1. name some reasons for the arduinos placement on the deck.
+ 1. could it have been placed diagonally? why or why not?
+ 2. could it have been placed in any other location? why or why not?
+ 3. could it be upside-down? why or why not?
+ 2. why are the motors between the wheels?
+ 3. why are the motors pointed towards the caster in the back?
+ 4. why are the battery packs between the wheels and caster
+ (roughly)?
+ 5. where is the breadboard?
+ 6. where is the caster?
+ 7. why is the caster in the middle of the back, instead of on the
+ left or right?
+ 8. should the black chip (motor controller) be on the left or the right
+ 9. why should the chip be on the right?
+**** misc.
+ 1. should you pick up a battery by the wires coming out of it?
+ 2. what are the wires coming out of the battery called?
+ 3. what's the difference between stranded and solid core wire?
+ 4. why are we using solid core wire for plugging into
+ the breadboard?
+ 5. why do we put the glue dots on the side of the battery pack
+ without the on/off switch?
+ 6. why do we wrap tape around the body of the motors?
+ 7. why do we put a zip tie around the motor?
+ 8. do you have a ratcheting socket wrench?
+ what is a ratcheting socket wrench?
+ 9. what would happen if there were no caster on the back
+ of the robot?
+ 10. what is the robot tread made out of?
+ 11. why is it difficult to push the sonar into the sonar holder?
+ 12. what would happen if the sonar were easy to push into the sonar
+ holder?