%! TEX root = ../thesis.tex
\chapter{Experiments}
<contains the experimental observations defined in th theory>

\section{Characterization}

\subsection{sampling time}
The first experiment needed to run was selecting an optimal number of cycles for which the adc will probe the to it at that moment connected pin. 

The ADC Sampling works by connecting one of the internal 12bit ADCs to a given Pin and then taking a sample value and disconnecting from the Pin, this proceure repeats fo all given pins and is bound to a Timer, whose Interrupts define the number of Ticks an ADC has to process the connected Voltage on a Pin.

In this case the uncalibrated measurement of our input voltage was taken as example, and repeated with each of the possible 8 settings of the in Firmware used value.

The resulting errors can be seen in figures \ref{sampleticks1} and \ref{sampleticks2}

\begin{figure}[H]
    \centering
    \hspace*{-.16\columnwidth}
    \includegraphics[width=1.3\columnwidth]{./data/m04_cycledepends/cycledepends_20180529.pdf}
    \caption{plotted difference from set input voltage, and fitted linearly, May 29th 2018, $\approx$32\si\degree C}
    \label{sampleticks1}
\end{figure}

Both figures \ref{sampleticks1} and \ref{sampleticks2} contain the relative error of the measured voltage compared to the theoretical , set input voltages. therefore the reference measurements (yellow), taken with an external multimeter, are not at 0.
Also shown are the calculated gain erors which would need to be corrected for in case of all 8 settings.
Important in figure \ref{sampleticks1} is the relative error in only the 0th case, here the cycleTime-Setting was set to 0 and therefore the smallest available sampletime. All other measurements are within errormargin of each other. 
The secondary plots confirm the 
\begin{figure}[H]
    \centering
    \hspace*{-.16\columnwidth}
    \includegraphics[width=1.3\columnwidth]{./data/m04_cycledepends/cycledepends_20180530.pdf}
    \caption{plotted difference from set input voltage, and fitted linearly, May 30th 2018, $\approx$25\si\degree C}
    \label{sampleticks2}
\end{figure}

\subsection{Voltages}

    \subsubsection{48V Input}

    \subsubsection{9.6V Output}
    \begin{figure}[H]
        \centering
        \hspace*{-.16\columnwidth}
        \includegraphics[width=1.3\columnwidth]{../pitstop/20180706/v10_0_nocalib.pdf}
        \caption{TODOF}
        \label{v10_precalib}
    \end{figure}

    \subsubsection{1.8V Output}

        \begin{figure}[H]
            \centering
            \hspace*{-.16\columnwidth}
            \includegraphics[width=1.3\columnwidth]{./data/m02_adccalib_48/adccalib_v18ana.pdf}
            \caption{}
            \label{1v8anabefore}
        \end{figure}
        \begin{figure}[h]
            \centering
            \hspace*{-.16\columnwidth}
            \includegraphics[width=1.3\columnwidth]{./data/m02_adccalib_48/adccalib_v18digi.pdf}
            \caption{}
            \label{1v8digibefore}
        \end{figure}


\subsection{Currents}

    \subsubsection{48V Input}

        %TODO: 19.6 and 20.6 unusable
        % \begin{figure}[h]
        %     \centering
        %     \includegraphics[width=\textwidth]{../pitstop/20180619/i48.pdf}
        %     \caption{Calibration of input current adcs 19.06.2018}
        %     \label{}
        % \end{figure}
        % \begin{figure}[h]
        %     \centering
        %     \hspace*{-.16\columnwidth}
        %     \includegraphics[width=1.3\columnwidth]{../pitstop/20180620/i48.pdf}
        %     \caption{Calibration of input current adcs 20.06.2018}
        %     \label{}
        % \end{figure}
        \begin{figure}[H]
            \centering
            \hspace*{-.16\columnwidth}
            \includegraphics[width=1.3\columnwidth]{pitstop/20180621/i48.pdf}
            \caption{Calibration of input current adcs 21.06.2018}
            \label{}
        \end{figure}

    \subsubsection{9.6V Output}

    \subsubsection{1.8V Output}
        \begin{figure}[H]
            \centering
            \hspace*{-.16\columnwidth}
            \includegraphics[width=1.3\columnwidth]{pitstop/20180702/i18ana_nocalib.pdf}
            \caption{Pre Calibration Measurement of Output Current at the 1.8V Analog Terminal (2.7.2018)}
            \label{precalib18iana}
        \end{figure}


\section{after Calibration}

\minty[minted options={lastline=8}]{yaml}{./pitstop/pitdb.yaml}

\subsection{Voltages}

    \subsubsection{48V Input}

    \subsubsection{9.6V Output}

    \subsubsection{1.8V Output}

\subsection{Currents}

    \subsubsection{48V Input}

    \subsubsection{9.6V Output}

    \subsubsection{1.8V Output}
        \begin{figure}[H]
            \centering
            \hspace*{-.16\columnwidth}
            \includegraphics[width=1.3\columnwidth]{pitstop/20180629/i18ana_postcalib.pdf}
            \caption{Post Calibration Measurement of Output Current at the 1.8V Analog Terminal (29.06.2018}
            \label{postcalib18iana}
        \end{figure}

\section{1.8V Regulation}

\subsection{Characterization of Dropoff}

\subsection{after <METHOD>-Correction}

\section{Pitfalls}

