Design for a Galton board

I designed this using InkScape, then used TinkerCad to make an stl. The top pane was lasercut out of clear acrylic.

Things you need:

• 3D printer
• Laser cutter
• Clear acrylic
• 3 mm nuts & bolts (x4)
• Steel balls.

I recommend to use balls with a diamter of 2 mm. At first, I used steel balls with a diameter of 1 mm. Unfortunately, these were too small. Because of satic electricity, some of the balls get stuck half way. 2 mm balls seem to work well.

• The lasercut part (Quincunx top.svg) still has larger hexagons with 3 mm space between them. In later versions, I made the hexagons smaller in the 3D printed part (Quincunx.svg). The lasercut part still has to be changed accordingly.
• In the provided .stl file, the middle panel has a thickness of 2 mm, to be used with balls of the same diameter. If you want to use balls with a different diameter, use the following workflow to create your own .stl file to be 3D printed.
  • Import Quincunx bottom.svg and Quincunx.svg into TinkerCad.
  • Set the thickness of both panels. For the middle panel: use the diameter of the balls you are using.
  • Align both panels, then group them.
  • Export to an .stl file
  • 3D print the .stl file
  • Lasercut Quincunx top.svg. Black = cut. Red = engrave.

If you dont't want Pascal's triangle and the normal distribution formula on the top panel you can lasercut Quincunx bottom.svg.

If you like what I made, you can

License: CC BY-NC-SA 4.0