for experimental research with magnetism in biomedicine and biota.
Operating power is deducible from the meters's readings while a compass needle’s deflection (up to about 50°) shows smoothly that they operate properly in accordance with the supplied voltage. Presently I don’t have a magnetometer (Gauss Meter), indispensable to properly experiment with it.
the smaller coil has an 8 ohms (resistance) winding**
on an interlaced ferrite nucleus which can be substituted to an amplifier's
speaker or get input from an audio-frequency (AF) generator, a pulse
generator, or a computer using AF generator software (example: Audacity,
open source) so that desired AFs can be superimposed on the coil’s voltage;
in this case battery operation (pure DC) is preferable to the 50 0r
60 cps AC operated power supply only if some external waveform is superimposed
since static magnetic fields are not recommended. In between the smaller
toroid’s winding and the 8 ohms winding there are three small windings
for inducing high frequencies.
9 switches and 14 input/output outlets in this configuration offer a
multiplicity of combinations and, obviously, this gives rise to a complicated
electrical network, but in its simplest configuration (toroidal coil,
lamp or resistor and a switch) even a small kid can set it up ... for
safety reasons not recommended! A smaller coil
for zonal applications can be used.
An adequate power variable ballast resistor can be used
with a fixed power supply.
** For more information see: The Interlaced Asymmetrical Cores Transducer