test maths rendering

.gitignore

+jake/
+**.elf
+**.hex
+**.bin
+**.lss
+**.map
+**.srec
+**.o
+**.d
+**.DS_Store
+**.b#*
+**.s#*
+
+**/ASF/
+
+js/node_modules/
+
+sim/js_code.txt
+sim/TinyNets/nbproject/
\ No newline at end of file

capacitive.md

@@ -16,9 +16,15 @@ In short, these solutions seem cool, but complicated, and I need to take some mo
  - adc resolution -> bar width / spacing
  - grounding, stack setup, tx pads, rx pad(s)?
 
+## Understanding the Phenomenon
+
+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. 
+
 Some quick thoughts 
- - do static tx / rx pads. reference is metallic thing that moves between them, changing the permeability of space between them
-  - bc capacitance is C = \frac{k * e * A}{d} where E is constant, A is area, and K is relative permeability (k ~= 1 for air)
+ - do static tx / rx pads. reference is metallic thing that moves between them, changing the permeattivity of space between them
+  - bc capacitance is C = \frac{k * e * A}{d} where E is constant, A is area, and K is relative permeattivity (k ~= 1 for air)
   - 'metallic thing' can be double-sided pcb w/ sawtooth or sine pattern to read
  - can do spreadsheet maths for tx / rx areas, see what total capacitance range will be (1pf -> 15pf?)
  - can figure apparent rise-time calculator, probably?

mkencoder-capacitive/eagle.epf

@@ -353,10 +353,10 @@ UsedLibrary="D:/Dropbox (Personal)/CBA/doc/libraries/eagle/fab.lbr"
 
 [Win_1]
 Type="Control Panel"
-Loc="0 0 3839 2065"
+Loc="0 0 1919 1016"
 State=1
 Number=0
 
 [Desktop]
-Screen="3840 2160"
+Screen="1920 2160"
 Window="Win_1"

mkencoder-capacitive/mkencoder-capacitive.sch

+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE eagle SYSTEM "eagle.dtd">
+<eagle version="8.3.2">
+<drawing>
+<settings>
+<setting alwaysvectorfont="no"/>
+<setting verticaltext="up"/>
+</settings>
+<grid distance="0.1" unitdist="inch" unit="inch" style="lines" multiple="1" display="no" altdistance="0.01" altunitdist="inch" altunit="inch"/>
+<layers>
+<layer number="90" name="Modules" color="5" fill="1" visible="yes" active="yes"/>
+<layer number="91" name="Nets" color="2" fill="1" visible="yes" active="yes"/>
+<layer number="92" name="Busses" color="1" fill="1" visible="yes" active="yes"/>
+<layer number="93" name="Pins" color="2" fill="1" visible="no" active="yes"/>
+<layer number="94" name="Symbols" color="4" fill="1" visible="yes" active="yes"/>
+<layer number="95" name="Names" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="96" name="Values" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="97" name="Info" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="98" name="Guide" color="6" fill="1" visible="yes" active="yes"/>
+</layers>
+<schematic xreflabel="%F%N/%S.%C%R" xrefpart="/%S.%C%R">
+<libraries>
+</libraries>
+<attributes>
+</attributes>
+<variantdefs>
+</variantdefs>
+<classes>
+<class number="0" name="default" width="0" drill="0">
+</class>
+</classes>
+<parts>
+</parts>
+<sheets>
+<sheet>
+<plain>
+</plain>
+<instances>
+</instances>
+<busses>
+</busses>
+<nets>
+</nets>
+</sheet>
+</sheets>
+</schematic>
+</drawing>
+</eagle>