The Extended Analog Computer (EAC) is a device which
computes using semi-conductive material, voltage gradients,
and logic arrays. The computational medium can be any semiconductive
material, such as black conductive foam, Jello
brand gelatin, or silicon. Voltage gradients are induced on the
conductive medium through the use of a series of sources and
sinks. Sources transmit electrical current to the medium by
producing an excess of electrons. These electrons, once on
the medium, tend to travel towards a sink. A sink provides a
path of least resistance for the electrons to exit the board. This
is either a ground or a negative voltage source.
As electrons flow across the medium from sources to sinks,
a voltage gradient is produced. This gradient can then be
sampled across the medium to produce a graph of the electrical
flows occurring on the conductive medium. Logic arrays are
used in order to modify the electrical currents being output to
the medium.