I wanted a rotating display stand for a printout of this ambiguous cylinder:
http://www.thingiverse.com/thing:1668263

I looked around on amazon and didn't like anything I found, so I whipped this up real quick in tinkercad and tossed an arduino nano and a cheap 9g servo at it. It's working pretty well so far. The cheap servo I threw in here does almost 180 degrees. Close enough for what I'm doing here.

Video of it actually working here:
https://www.youtube.com/watch?v=SnhmS1U0bKQ

Printrbot

Simple Black

No

No

.3mm

10%

Quality doesn't matter much on this print. For one, it's not the thing on display, and for two, the thing will print a lot faster at larger layer heights. There's no fine detail to capture, so that's fine.

Print out both pieces.
I added black duct tape on the surface of the rotating disc piece to keep things from sliding off.
Wiring diagram is attached as an image. Pieces are hotglued into the structure. See photos.

Parts:

arduino nano - $6ish on amazon, but you can find them for 2-3 bucks a piece if you're willing to buy a dozen or so from aliexpress/ebay.
https://smile.amazon.com/ATmega328P-Microcontroller-Board-Cable-Arduino/dp/B00NLAMS9C/

9g servo - $3ish each on amazon if you buy 5: https://smile.amazon.com/Genuine-Helicopter-Airplane-controls-TowerPro/dp/B019H9BNTQ/

Other than that, it's just wires. I tossed a 5V boost converter in and put plugs on all the connections because I like reusing my parts from old projects and it's easier if they have plugs. You could wire this with a lot less wire if wire management is your thing. I'm terrible about leaving too much wire in things.

Code is up at:
https://github.com/bobiam/rotobox

It's a slight modification of the sweep program. My servos aren't quite getting 180 degrees, but they're close enough for my purposes.

Built in Tinkercad, with source files available here:

https://www.tinkercad.com/things/cDHnetI0y6V-rotoboxbase
https://www.tinkercad.com/things/cfv2FyRuqTN-rotoboxlid