There are so many Simple Bots that sweep and scrub, that I felt it only appropriate to make one that picks up after them. Scoop does just that. It pushes itself around and systematically scoops up whatever lies in its path. Well... maybe "systematically" is too strong of a word to use in describing it, but it definitely gets an A+ for effort. If there is one thing that Scoop Bot wants to do more than anything else in this world, that is scoop. There is not a man, woman, ice cream server, or investigative journalist alive, quite as dedicated to scooping.
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Step 1: Go Get Stuff
(x2) continuous rotation servo modified for direct drive**
(x1) 3 x AA battery holder
(x1) dust pan
(x1) 12" aluminum ruler
(x10) 4-40 x 3/8" nuts and bolts
(x8) 10-24 x 3/4" nuts and bolts
(x8) rubber feet
(x1) assorted zip ties
**Modify your servos for direct drive here
Step 2: Attach
Step 3: Remove and Drill
Drill 1/8" holes into each of the corners of the servo horn.
Step 4: Cut
Step 5: Mark and Drill
Drill 1/8" holes where each of these marks were placed.
Step 6: Drill Again
Where this mark was made, drill a 1/4" hole.
Step 7: Reattach
Step 8: Fasten
Step 9: Remove the Wheel
Step 10: Spacers
Cut four 1/2" spacer tubes out of the pen's body.
Step 11: Caster Time
Step 12: Rubber Feet
Step 13: Drill Some Holes
Also, drill another 3/16" hole nearby to pass through all four of the motor's wires.
Step 14: Attach
Step 15: Wire It Up
Connect the remaining two black and red servo wires togethe,r as well.
Finally, attach the first pair of wires to the red wire of the battery pack.
Attach the other pair of wires to the black wire.
Note: if your feet are spinning backwards when you power it up later, reverse the connections of the battery wires.