I found a broken plasma globe at the thrift store and decided to rebuild it. Now it looks like it belongs with all my other antique tech.

I made myself a tiny Van De Graaff electrostatic generator. Great for making really small sparks.

BUILD DETAILS:

• The bottom roller is 3d printed and wrapped in PTFE tape.
  
• The top roller is glass.
  
• The belt is rubber.
  
• The sphere is stainless steel (I cut a hole in a garden gazing ball).
  
• The combs are made of copper wire strands.
  
• Uses a 3v motor powered by two AA batteries.