A diagram and some construction details are given for the Kelvin water dropper. A Kelvin water dropper discharges a small neon lamp. Animation sequence shows principles of operation. The Kelvin water dropper is extended to multiphase, multifrequency operation by considering N streams and N cans. A five can version is shown.
Water drops through a paraffin coated funnel into a brass cup.
The funnel and cup are connected to a electroscope.