Index: firmware/ShutterController/docs/FactShutter.tex
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--- firmware/ShutterController/docs/FactShutter.tex	(revision 14270)
+++ firmware/ShutterController/docs/FactShutter.tex	(revision 14270)
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+\documentclass[12pt,a4,twoside]{article}
+
+\usepackage[english]{babel}
+\usepackage{graphicx}
+\usepackage{color}
+\usepackage{cite}
+\usepackage[mathcal]{eucal}
+\usepackage{amsmath}
+\usepackage{footnote}
+\usepackage{multirow}
+\usepackage{eurosym}
+% Normal DIN A4 page format
+%
+\setlength{\marginparwidth}{0cm}
+%%\setlength{\evensidemargin}{0cm}
+%\setlength{\textheight}{23cm}
+%\setlength{\textwidth}{17.5cm}
+%%\setlength{\marginparwidth}{-2cm}
+\setlength{\evensidemargin}{0cm}
+\setlength{\oddsidemargin}{0cm}
+%\setlength{\voffset}{-2cm}
+\setlength{\hoffset}{-0.5cm}
+\textheight 20.5cm
+\textwidth 17.0cm
+\oddsidemargin 10pt
+\evensidemargin 10pt
+\setlength{\topmargin}{0.0cm}
+\addtolength{\topmargin}{-30pt}
+\addtolength{\textheight}{60pt}
+%distance between paragraphs
+\setlength{\parindent}{0.0em}
+\setlength{\parskip}{5pt plus 2pt minus 1pt}
+%%%%%%%%%%%%%% To give more room to figures %%%%%%%%%%%%%%%%%%%%%%%
+\setcounter{topnumber}{9}
+\setcounter{bottomnumber}{9}
+\setcounter{totalnumber}{9}
+\renewcommand{\textfraction}{0.0}
+\renewcommand{\topfraction}{1.0}
+\renewcommand{\bottomfraction}{1.0}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\frenchspacing
+\sloppy
+%%%%%%%%%%%%%%%%%%%%%%%% Page Headings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\usepackage{fancyhdr}
+\pagestyle{fancy}
+%\rhead{Dr. V. Boccone}
+%\lfoot{\thepage}
+%\rfoot{\thepage}
+\usepackage{lastpage}
+\cfoot{\thepage\ of \pageref{LastPage}}
+
+\makeatletter
+\renewcommand{\@maketitle}{
+\newpage
+ \null
+ \vskip 2em%
+  {\LARGE \bf \@title \par}%
+  {\@author \par}
+ \par} \makeatother
+
+ 
+ 
+
+\def\mul{\multicolumn}
+\def\dyfr{\D\frac}
+\def\mysection#1{\section{#1}\label{sec: #1}}
+\def\mysubsection#1{\subsection{#1}\label{subsec: #1}}
+\def\mysubsubsection#1{\subsubsection{#1}\label{subsubsec: #1}}
+\def\mysubsubsubsection#1{\paragraph{#1}\label{subsubsubsec: #1}{~}}
+\setcounter{secnumdepth}{5}
+
+
+\begin{document} 
+\title{FACT Shutter User Guide}
+\author{V.~Boccone} % Dr.
+\maketitle 
+%\vspace*{0 mm}
+%\address{D\'epartement de physique nucl\'eaire et corpusculaire (DPNC),
+% 24, Quai Ernest-Ansermet \\
+%1211 Gen\'eve \\
+%{\rm E-mail: boccone@cern.ch}}
+\vspace*{-54mm}
+\begin{figure}[h]
+\includegraphics[width=40mm]{unigeLogo.jpg}
+\end{figure}
+\vspace*{-28mm}
+{\flushright 
+\hfill{\bf FACT Shutter (ab)User Guide}\\
+\hfill{\today}\\
+\hfill{boccone@cern.ch}}
+\vspace*{40 mm}
+
+\section{\label{sec:1} Introduction}
+The new remote controllable shutter system for the FACT telescope is built around two low voltage 24~V linear actuatorrs from Linak\footnote{Linak AG}
+
+The two motors are connected to a dual VHN-5019 motor driver Arduino shield which is able to control simultaneously 2 mid-high power motors using Pulse Width Modulation (PWM). The VHN-5019 also grant the possibility of performing current sensing on the A0/A1 pins of the Arduino board. The current sensing coefficient is 0.14 V/A and for this reason, in view of low current measurement, two 10x amplifiers followed by each followed by a low pass 2$^{nd}$ \mbox{($\nu_{cut}=1~$ kHz)} Butterworth filter were included on a custom circuit mounted as an Arduino shield.
+
+%In view of an - almost - completely remote operability of the FACT telescope the shutter
+
+%The new system was adapted as much as possible on the old mechanics.... 
+
+%Each lid can move independently by a 55 mm stroke actuator which grant the necessary excursion to reach the $110^{\circ}$ which is required in order no to shadow the camera.
+
+
+
+\begin{figure}[b!]
+\centering
+\includegraphics[width=1\textwidth]{shutter_sketch.pdf}
+\caption{\label{fig1} {Sketch of the shutter system}}
+\end{figure}
+\end{document}
+