DIY Lightning Wand -- A Handheld Van de Graaff Generator

Step 6 Complete Assembly

Loop the rubber band onto the upper roller and insert the roller assembly into its holes. Thread an alligator lead through the column, hook the rubber band, and pull it through the column. Pinch a loop into the end of the rubber band and hook it onto the lower roller. Insert the column into the Tee. Look down into the column to make sure the rubber band is not twisted and everything is lined up. Point the upper comb at the rubber band. Make sure neither comb is touching the rubber band. Place the aluminum can onto the column. Push the support up until the can rests on it. Use a couple pieces of electrical tape to affix the can to the support. Later you can glue the bottle neck to the can, but make sure the hole in the bottle is large enough to pass the PVC with the upper wire attached. The end of the upper comb's wire should make contact with the inside of the aluminum can. Place a 3/4" PVC cap onto the handle and insert it into the Tee. Grip the end of the lower comb's wire (aka ground wire) while holding the handle. Apply power to the motor. With a lot of luck you'll feel a static charge on the collector when you move your hand near.

To prevent the VDG from producing sparks you can cover the collector with a piece of cardboard. The VDG will still perform most of the same stunts including the merciless destruction of electronic devices.