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\title{\textbf{Door Alarm}}
\author{Steak Electronics}
\date{}
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  \section{Log Viewer}}


\subsection{LM317}
As the viewfinder needs its own power supply, I need 7V from 12V. Parts box has LM317.

\begin{verbatim}
Formula for LM317:
     Vout = 1.25 * (1+ R1/R2)
\end{verbatim}

Standard R1 is 240ohm, so let's keep to the standard.\footnote{Check when looking through devices that use LM317, which adhere to that standard. They should, when possible. Standards should always be followed.}





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