This is a simple, hand driven Van de Graaff generator designed to produce very high electric potentials at low currents.
The apparatus consists of a wooden base, an insulated Plexiglas stand, a rubber belt, a removable metal dome (135 mm diameter), a driving wheel, and a driving belt.
The discharge sphere, which has a diameter of 50 mm, is mounted on a pivoted arm that includes a handle for easy adjustment.
The length of the electrical spark is approximately 30 mm.