Franklyn Bells


HV Generator 10Kv Plus
2x Small Telephone Bells or similar
Cotton or nylon string/twine
Conductive ball (see
Small Bolts to mount bells
Insulated wire
Retort stand or support to attach twine to



Franclin bells


Mount the two bells onto the bolts through the hole in the centre of the bell. Mount the two bells on a non-conductive surface.

Mount the ball on the string so the ball sits between the two bells.

Adjust the two bells so the edges are 10mm away from the outside of the ball on each side.

Apply high voltage across the two bells.


A similar setup to above, but uses a short track of PVC pipe with the ball running on top rather than a pendulum. Supply is a TV flyback transformer giving around 25Kv.

Extreme Electronics will not be held responsible for any electric shock, burn or injury. These experiments are done entirely at your own risk. Please read our safety instructions