Just like a bull, a bronco, and a ninja, Buck has a lot of kick. With spring-loaded feet, this noisy little bot does a lot of stomping about. Everywhere Buck goes, commotion ensues. This keeps people on their toes, which is a good attribute for any bot to have.
Get the Simple Bots eBook for more projects!
Step 1: Go get stuff
You will need:
(x1) continuous rotation servo modified for direct drive**
(x1) 4" x 3" x 2" plastic container
(x1) 4 X AA battery holder
(x1) 5" cylindrical metal drawer pull (with two arms)
(x1) 8-32 x 2" bolt
(x3) 8-32 nut
(x2) 4-40 x 3/4" bolt
(x4) 4-40 nuts
(x2) 1/8" (inner diameter) x 1/2" plastic spacer
(x1) 3/4" to 1" extension spring
(x2) 4-40 x 1/4" nuts and bolts
(x1) Assorted zip ties
**Modify your servos for direct drive here
Step 3: Fasten
Pass the 4-40 x 3/4" bolts up through the holes in the servo horn.
Thread a nut all the way down to fasten them in place.
Slide on the plastic spacer, and then screw on another nut to fasten this in place, as well.
Step 4: Mark
Lay the drawer pull on its side and make a mark on the top surface 3" from one side of the handle.
Step 6: Spring
Slide the spring down to the end of the 2" bolt. Fasten this firmly in place with a nut.
Thread another nut half way down the bolt.
Now, slide the bolt into the hole that was drilled in the drawer pull.
Fasten the bolt in place by threading on yet one more nut.
Step 7: Mark and Drill
Turn the plastic container upside down. Measure 1/4" up from the container's lip and 2" in from the side of the container. Make a mark.
Make an identical mark mirrored on the opposite side of the plastic container.
Drill both of these marks with a 1/2" spade bit.