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.