\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{sean}
\pdfinfo{
  /Title (pcb-layout-notes.pdf)
  /Creator (Cheatography)
  /Author (sean)
  /Subject (PCB Layout Notes Cheat Sheet)
}

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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
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% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{PCB Layout Notes Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{sean} via \textcolor{DarkBackground}{\uline{cheatography.com/22969/cs/6138/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}sean \\
  \uline{cheatography.com/sean} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 12th May, 2016.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Grids}}  \tn
% Row 0
\SetRowColor{LightBackground}
Visible Grid & 100 thou \{\{nl\}\}{\emph{typical for through-hole work}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Snap Grid & 50/25/10 thou\{\{nl\}\}{\emph{typically used for track layout}} \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.76 cm} x{6.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Tracks}}  \tn
% Row 0
\SetRowColor{LightBackground}
Signal & 25 thou \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Ground & 50 thou \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
"neck down" & 10-15 thou \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
 & {\emph{\{\{fa-angle-right\}\}neck down to pass between component pads}}\{\{nl\}\}{\emph{\{\{fa-angle-right\}\}keep track widths as large as possible to\{\{nl\}\}~~~minimize resistance, inductance, etc.}} \tn 
% Row Count 11 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\emph{See track width chart to the right for track width recommendations based on current flow, for a 10 deg C temperature rise within the track.}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.52 cm} x{6.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Spacing}}  \tn
% Row 0
\SetRowColor{LightBackground}
10 thou & typical amount \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
8 thou & achievable with homemade PCBs \tn 
% Row Count 2 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\emph{See minimum spacing chart to right for track spacing based on voltages.}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Pads}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Through~hole,~leaded~components}}\{\{nl\}\}{\emph{(resistors, capacitors, etc.)}} & Round\{\{nl\}\}70 thou \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
{\bf{Dual In-Line}}\{\{nl\}\}{\emph{(eg. IC's)}} & Oval\{\{nl\}\}60 thou \{\{fa-arrows-v\}\}, 90-100 thou \{\{fa-arrows-h\}\} \tn 
% Row Count 9 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\bf{SMT packages}} & Rectangular {\emph{for most}}\{\{nl\}\}Oval {\emph{for SO packages}} \tn 
% Row Count 12 (+ 3)
% Row 3
\SetRowColor{white}
 & \{\{fa-angle-right\}\}{\emph{pin 1 is in a rectangular shape}}\{\{nl\}\}\{\{fa-angle-right\}\}{\emph{keep track widths as large as possible to minimize resistance, inductance, etc.}} \tn 
% Row Count 20 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{2.48 cm} x{5.52 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Vias}}  \tn
% Row 0
\SetRowColor{LightBackground}
Round & 0.5mm-0.7mm \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{2.24 cm} x{5.76 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Holes (eg. through-hole components)}}  \tn
% Row 0
\SetRowColor{LightBackground}
Round & 1mm (39 thou) \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{NOTES}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Board Dimensions}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Measured in mm} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Copper Weight/Thickness Guildelines}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}General Purpose: 1oz copper\{\{nl\}\}High Current: 2oz - 4oz copper} \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Design and Layout (eg. grids, pads, tracks, spacing)}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}use thou} \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Mechanical and Manufacturing (eg. hole sizes, board dimensions)}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}use mm} \tn 
% Row Count 11 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.584 cm} x{1.8 cm} x{1.8 cm} x{2.016 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{8.4cm}}{\bf\textcolor{white}{Minimum Track Width for 10 deg C rise}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Current}}\{\{nl\}\}{\emph{Amps}} & {\bf{Width}} {\emph{1oz}}\{\{nl\}\}{\emph{thou}} & {\bf{Width}} {\emph{2oz}}\{\{nl\}\}{\emph{thou}} & {\bf{milliOhms}}\{\{nl\}\}{\emph{per inch}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
1 & 10 & 5 & 52 \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
2 & 30 & 15 & 17.2 \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
3 & 50 & 25 & 10.3 \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
4 & 80 & 40 & 6.4 \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
5 & 110 & 55 & 4.7 \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
6 & 150 & 75 & 3.4 \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
7 & 180 & 90 & 2.9 \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
8 & 220 & 110 & 2.3 \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
9 & 260 & 130 & 2.0 \tn 
% Row Count 12 (+ 1)
% Row 10
\SetRowColor{LightBackground}
10 & 300 & 150 & 1.7 \tn 
% Row Count 13 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.584 cm} x{2.508 cm} x{2.508 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{8.4cm}}{\bf\textcolor{white}{Minimum Spacing {\emph{(based on voltage)}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Voltage}}\{\{nl\}\}{\emph{(DC/Peak AC)}} & {\bf{Internal}}\{\{nl\}\}{\emph{mm / thou}} & {\bf{External}}\{\{nl\}\}{\emph{mm / thou}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
0-15V & 0.05mm/2 thou & 0.1mm/4 thou \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
16-30V & 0.05mm/2 thou & 0.1mm/4 thou \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
31-50V & 0.1mm/4 thou & 0.6mm/23.6 thou \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
51-100V & 0.1mm/4 thou & 0.6mm/23.6 thou \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
101-150V & 0.2mm/8 thou & 0.6mm/23.6 thou \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
151-170V & 0.2mm/8 thou & 1.25mm/49 thou \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
171-250V & 0.2mm/8 thou & 1.25mm/49 thou \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
251-300V & 0.2mm/8 thou & 1.25mm/49 thou \tn 
% Row Count 17 (+ 2)
% Row 9
\SetRowColor{white}
301-500V & 0.25mm/98.5 thou & 2.5mm/98.5 thou \tn 
% Row Count 19 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Best Practices}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Best Practices}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}\{\{fa-angle-right\}\} {\bf{Track Size:}}  Keep track size as large as you can get away with, necking down as needed when things get crowded.} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}\{\{fa-angle-right\}\} {\bf{Track Size:}}  Design track size for a 10deg C temp rise within the tracks (see table, pg.7, in \{\{link="http://alternatezone.com/electronics/files/PCBDesignTutorialRevA.pdf"\}\}PCB design tutorial article by Dave Jones\{\{/link\}\})} \tn 
% Row Count 10 (+ 6)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}\{\{fa-angle-right\}\} {\bf{Professional Manufacture:}}  When having your board professionally manufactured, consult their design guides to see what their minimum track size/spacing is.} \tn 
% Row Count 14 (+ 4)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}\{\{fa-angle-right\}\} {\bf{Pad/hole ratio:}}  the ratio of pad size to hole diameter.  Rule of thumb is to aim for the pad to be 1.8 times larger than the diameter of the hole (allows for alignment tolerances between drill and artwork).} \tn 
% Row Count 19 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{PCB design tutorial article by Dave Jones\{\{nl\}\}http://alternatezone.com/electronics/files/PCBDesignTutorialRevA.pdf}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}