This is a 3D model for a mini disco ball. Print it out.

Step 1:

You may also need a gear motor.

Step 2:

Install the 12-lights led and gear motor into the printed base with reference to the diagram;

Step 3:

The exterior is completed;

Step 4:

Connect the reflecting ball to the gear motor using the printed linking components (here I have used hot glue instead), connect to Arduino and then upload the codes (Codes for the LED ring are sample codes from the Adafruit_NeoPixel library).

Step 5:

Adafruit_NeoPixel

3D Printing Documents

The ball is flashing like a twinkling star. It’s all done!

Step 6:

read original artical:https://www.dfrobot.com/blog-521.html