@@ -20,7 +20,7 @@ In short, these solutions seem cool, but complicated, and I need to take some mo

It's good to try to get a grounding on what's really going on. To get the basics in order, I go [here](http://hyperphysics.phy-astr.gsu.edu/hbase/electric/pplate.html).

Capacitance is $C = \frac{k * e * A}{d}$ where $k$ is the relative permittivity of the material between the plates, $e$ is a constant making $k * e = 1$ in air, $A$ is the area of the plates and $d$ is the separation of those plates.

Capacitance is $'C = \frac{k * e * A}{d}'$ where $'k'$ is the relative permittivity of the material between the plates, $'e'$ is a constant making $'k * e = 1'$ in air, $'A'$ is the area of the plates and $'d'$ is the separation of those plates.

Some quick thoughts

- do static tx / rx pads. reference is metallic thing that moves between them, changing the permeattivity of space between them