Step 1: Go get stuff
(x1) continuous rotation servo modified for direct drive **
(x1) paint can (or similar)
(x2) 1" paintbrushes
(x1) 4 x AA battery holder
(x4) AA batteries
(x1) tilt switch (Mouser #107-2002-EV)
(x1) assorted zip ties
(x1) template (see below)
**Learn to remove a servo controller board at this page.
Step 2: Disassemble the brush
Step 3: Zip tie
Place the motor on top such that the servo horn (the gear-looking object) sticks off perpendicularly in one direction and the wooden handles are sticking off in the opposite direction.
Zip tie it all together until it is one singular unit and won't fall apart.
Step 4: Wire it up
Solder the red wire from the battery holder to the little spike that sticks out of the tilt switch. Solder the red wire from the motor to the round metallic body of the tilt switch.
It makes it easier to solder to the tilt switch if you place a small pool of solder on it first.
Step 5: Clean the can
Step 6: Drill holes
Tape the template to the bottom of the can and drill the four smaller holes with an 1/8" drill bit or one appropriately sized for your zip ties.
Step 7: Put it together
Zip tie the servo horn to the holes that you drill in the bottom of the can. You may need to drill and/or widen the holes in the servo horn to accommodate the zip tie that you are using.
Trim the excess piece of zip tie when you are done.