Implement and document Arduino software

documentation/arduino.tex

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+\documentclass[border=1mm]{standalone}
+
+\usepackage{tikz}
+\usetikzlibrary{positioning}
+\usepackage{circuitikz}
+
+\begin{document}
+
+\begin{circuitikz}[
+  chip/.style = {
+    dipchip,
+    hide numbers,
+    no topmark,
+    external pins width=0,
+    num pins=14,
+  }]
+  \ctikzset{multipoles/dipchip/width=1.6}
+
+  % Arduino MKR1000
+  \node [chip] (MKR1000) {};
+  % align=center enables line breaks in node text
+  \node [align=center, rotate=90] at (MKR1000.center){Arduino\\MKR1000};
+
+  \draw (MKR1000.n) -- ++(0,1) node[vcc]{};
+  \draw (MKR1000.s) -- ++(0,-1) node[ground] {};
+
+  \node [right, font=\tiny] at (MKR1000.bpin 4) {0};
+
+  \node [left, font=\tiny] at (MKR1000.bpin 12) {VIN};
+  \node [left, font=\tiny] at (MKR1000.bpin 11) {A3};
+  \node [left, font=\tiny] at (MKR1000.bpin 10) {A4};
+
+  % Arduino MKR RGB Shield
+  \node[chip, right=of MKR1000] (RGB) {};
+  % align=center enables line breaks in node text
+  \node [align=center, rotate=90] at (RGB.center){Arduino\\MKR RGB Shield};
+
+  \draw (RGB.s) -- ++(0, -1) node[ground]{};
+
+  \node [right, font=\tiny] at (RGB.bpin 3) {VIN};
+  \node [right, font=\tiny] at (RGB.bpin 4) {A3};
+  \node [right, font=\tiny] at (RGB.bpin 5) {A4};
+
+  \draw (MKR1000.bpin 12) -- (RGB.bpin 3);
+  \draw (MKR1000.bpin 11) -- (RGB.bpin 4);
+  \draw (MKR1000.bpin 10) -- (RGB.bpin 5);
+
+  % Reed switch
+  \draw (MKR1000.bpin 4) -- ++(-1, 0) to [normal open switch, name=R] ++(0, -2.96) node[ground]{};
+
+  \node [rotate=90, above] at (R) {Reed Switch};
+\end{circuitikz}
+
+
+\end{document}