\section{実験手順・条件}

\subsection{実験器具}

\begin{itemize}
    \item {ブレッドボード}
    \item {緑色LED OSG8HA3Z74A}
    \item {抵抗器 $470 \ \Omega \pm 5 \ \%$ 1/4 W}
    \item {Analog Devices, ADALM2000}
\end{itemize}

\subsection{実験回路}

\begin{figure}[tbh]
    \centering
    \begin{circuitikz}
        \ctikzset{multipoles/dipchip/width=2.5}
        \draw (0,0) node[dipchip, num pins=12, hide numbers, no topmark, external pins width=0](AD){ADALM2000};
        \node [left, font=\small, align=right] at (AD.bpin 12) {V+};
        \node [left, font=\small, align=right] at (AD.bpin 11) {V-};
        \node [left, font=\small, align=right] at (AD.bpin 10) {1+};
        \node [left, font=\small, align=right] at (AD.bpin 9) {1-};
        \node [left, font=\small, align=right] at (AD.bpin 8) {2+};
        \node [left, font=\small, align=right] at (AD.bpin 7) {2-};

        \draw (AD.bpin 12) -- ++(1,0) to [full led] ++(2,0) to [R={$470 \ \Omega$}] ++(2,0) -- ++($(AD.bpin 11) - (AD.bpin 12)$) -- (AD.bpin 11);
        \draw (AD.bpin 10) -- ++(0.5,0) to [short, -*] ++($(AD.bpin 12) - (AD.bpin 10)$);
        \draw (AD.bpin 9) -- ++(0.75,0) to [short, -*] ++($(AD.bpin 11) - (AD.bpin 9)$);
        \draw (AD.bpin 8) -- ++(3,0) to [short, -*] ++($(AD.bpin 12) - (AD.bpin 8)$);
        \draw (AD.bpin 7) -- ++(1,0) to [short, -*] ++($(AD.bpin 11) - (AD.bpin 7)$);
    \end{circuitikz}
    \caption{Circuit Diagram for Experiments}
    \label{fig:cd-exps}
\end{figure}

\subsection{実験1}

\begin{enumerate}
    \item {ADALM2000を用いて1 Vから7 Vまでの電圧を回路に印加する}
    \item {抵抗の電圧降下と回路の電圧を記録する}
\end{enumerate}

\subsection{実験2}

\begin{enumerate}
    \item {ADALM2000を用いて1 Vから3 Vまでの逆電圧を回路に印加する}
    \item {抵抗の電圧降下と回路の電圧を記録する}
\end{enumerate}