From af6496dd42747ee91c8a954683350cb80b04fef5 Mon Sep 17 00:00:00 2001
From: Selene Corbineau <selene.corbineau@ens.fr>
Date: Fri, 6 Feb 2026 17:32:00 +0100
Subject: [PATCH] Setting things up

---
 .gitignore   |   6 +++
 handbook.tex | 132 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 138 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 handbook.tex

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+*.pdf
+*.log
+*.aux
+*.toc
+*.fls
+*.fdb_latexmk
diff --git a/handbook.tex b/handbook.tex
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+\documentclass[a6paper, fontsize=6pt, twosided]{scrreport}
+
+\usepackage[T1]{fontenc}
+\usepackage{booktabs}
+\usepackage[svgnames]{xcolor}
+\usepackage{siunitx}
+\usepackage[french]{babel}
+
+\newenvironment{fulltab}[1]{\begin{center}\begin{tabular*}{\linewidth}{@{\extracolsep{\fill}} #1}}
+{\end{tabular*}\end{center}}
+
+\def\Vt{V_{\mathrm T}}
+\def\kbT{k_BT}
+\setlength\tabcolsep{0pt}
+\setlength\parindent{0pt}
+
+\title{Incomplete handbook of all things useful}
+\author{Sélène Corbineau}
+\begin{document}
+\maketitle
+\tableofcontents
+\pagebreak
+
+\chapter{Mechanics}
+\section{Metric machine bolts}
+
+\paragraph{Threads}
+\begin{fulltab}{lccccc}
+\toprule
+Thread & Pitch & Tapping dia. & \multicolumn{3}{c}{Clearance dia.}\\
+\cmidrule{4-6}
+ & & & Close & Medium & Loose\\
+\midrule
+M1.6 & 0.35 & 1.25 & 1.7 & 1.8 & 2.0\\
+M2 & 0.4 & 1.6 & 2.2 & 2.4 & 2.6\\
+M2.5 & 0.45 & 2.05 & 2.7 & 2.9 & 3.1\\
+M3 & 0.5 & 2.5 & 3.2 & 3.4 & 3.6\\
+M4 & 0.7 & 3.3 & 4.3 & 4.5 & 4.8\\
+M5 & 0.8 & 4.2 & 5.3 & 5.5 & 5.8\\
+M6 & 1 & 5 & 6.4 & 6.6 & 7.0\\
+M8 & 1.25 & 6.8 & 8.4 & 9.0 & 10.0\\
+M10 & 1.5 & 8.5 & 10.5 & 11.0 & 12.0\\
+\bottomrule
+\end{fulltab}
+
+\paragraph{Hex heads, nuts}
+\begin{fulltab}{lccccc}
+\toprule
+	Thread & s   & e (min.)   & k (nom.) & m (max.) & m'\\
+\midrule
+M1.6   & 3.2 & 3.28       & 1.1 & 1.3\\
+M2     & 4.0 & 4.18       & 1.4 & 1.6 & 0.95\\
+M2.5   & 5.0 & 5.31       & 1.7 & 2 & 1.35\\
+M3     & 5.5 & 5.88       & 2 & 2.4 & 1.55\\
+M4     & 7   & 7.50       & 2.8 & 3.2 & 1.95\\
+M5     & 8   & 8.63       & 3.5 & 4 & 2.45\\
+M6     & 10  & 10.89      & 4 & 5 & 2.90\\
+M8     & 13  & 14.20      & 5.3 & 6.5 & 3.70\\
+M10    & 16  & 17.59      & 6.4 & 8 & 4.70\\
+\bottomrule
+\end{fulltab}
+
+\chapter{Electronics}
+\section{Labelling}
+\paragraph{Color code}
+
+\newcommand{\cbox}[1]{\colorbox{#1}{\phantom{Cor}}}
+
+\begin{fulltab}{lcccccccccccc}
+\toprule
+& \cbox{black} & \cbox{brown} & \cbox{red} & \cbox{orange} & \cbox{yellow} & \cbox{green} & \cbox{blue}
+	& \cbox{violet} & \cbox{gray} & \cbox{white} & \cbox{Gold} & \cbox{Silver}\\
+\midrule
+Digit& 0 & 1   & 2   & 3 & 4 & 5     & 6      & 7     & 8 & 9 & -1  & -2\\
+Tol. &   & 1\% & 2\% &   &   & 0.5\% & 0.25\% & 0.1\% &   &   & 5\% & 10\%\\
+\bottomrule
+\end{fulltab}
+\og Ne Mangez Rien Ou Je Vous Battrai Violemment, Grand Boa. \fg{} Gold and Silver cannot occur in the mantissa.
+
+\paragraph{Marking schemes}
+With color rings, read with outermost ring to the right
+\begin{itemize}
+\item 2 digits + exponent + tolerance
+\item 3 digits + exponent + tolerance
+\end{itemize}
+With digits: 2 digits + exponent. The base units are \unit{\ohm}, \unit{\micro\henry} and \unit{\pico\farad}.
+
+\paragraph{Preferred numbers}
+% Recall E6/E12/E24
+
+\section{Common components}
+\paragraph{Complementary BJT pairs}
+\begin{fulltab}{lccccc}
+\toprule
+	Part n°  & $V_{\textrm{CEO}}$ (V) & $I_{C,\textrm{max}}$ (mA) & $\beta$@$I_C$  & $f_T$ (MHz) \\
+\midrule
+BC547C,'557 & 45 & 100 & 420..800 @ 10 & 300\\
+2N3904,'06 & 40 & 200 & 100..300 @ 10 & 300\\
+BC327,'337 & 45 & 500 & 100..600 @ 100 & 100\\
+\bottomrule
+\end{fulltab}
+
+\paragraph{Power BJTs}
+\begin{fulltab}{lccccc}
+\toprule
+	Part n° & $V_{\textrm{CEO}}$ (V) & $I_{C,\textrm{max}}$ (A) & $\beta$@$I_C$  & $f_T$ (MHz)\\
+\midrule
+D44H11,'45  & 80 & 10  & 60 @ 1 & 50\\
+TIP41,'42 & 80 & 6  & 15..75 @ 3 & 3\\
+\bottomrule
+\end{fulltab}
+
+\section{Topologies}
+
+\paragraph{Differential gain of diff-pair} $U_d$ is the \emph{one-legged} bias drop.
+\[H_{D\rightarrow D} = \frac{U_d}{\Vt}\]
+
+\section{Noise models}
+
+\paragraph{Johnson noise} Typical power density is $4\kbT$, therefore \(e_n = \sqrt{4\kbT R}\) and
+\(i_n = \sqrt{\kbT / R}\).
+
+\chapter{Telecommunications}
+\section{Amateur radio}
+\paragraph{HF frequency allocations (region I)}
+\paragraph{Q-code}
+\paragraph{Purity limits}
+
+\section{Character encodings}
+\paragraph{7-bit ASCII}
+\paragraph{HD4480}
+\end{document}