Read this first before you start experimenting and for beginners:
www.overunity.com/newman
and
www.overunity.com/newman2
The Newman effect is based on the direct conversion of the contact
materials of dissimular metals at an arc at the commutator,
so there are coming free electrons into the
circuit which will give additional power output.
This I have found out in my study over many years of the Newman machines.
Regards, Stefan Hartmann.