diff --git a/Vorträge/arduino/arduino.tex b/Vorträge/arduino/arduino.tex
index 2c51bea..3c81b48 100644
--- a/Vorträge/arduino/arduino.tex
+++ b/Vorträge/arduino/arduino.tex
@@ -10,6 +10,7 @@
 \usepackage{amsmath,amsfonts,graphicx}
 \usepackage{multicol}
 \usepackage{hyperref}
+\usepackage{colortbl}
 \usepackage{listings}
 \lstset{language=C}
 
@@ -33,6 +34,8 @@
 
 \newcommand{\weblink}[1]{\textcolor{blue}{\href{#1}{#1}}}
 \definecolor{darkblue}{rgb}{0,0,.45}
+\definecolor{gold}{rgb}{.854,.674,.125}
+\definecolor{silver}{rgb}{.752,.752,.752}
 \newcommand{\cfunc}[1]{\texttt{\textcolor{darkblue}{#1}}}
 
 \author{Fisch, Stefan, Tunix}
diff --git a/Vorträge/arduino/bilder/resistor_220.pdf b/Vorträge/arduino/bilder/resistor_220.pdf
new file mode 100644
index 0000000..1c580b9
Binary files /dev/null and b/Vorträge/arduino/bilder/resistor_220.pdf differ
diff --git a/Vorträge/arduino/kapitel/led_auf_shield.tex b/Vorträge/arduino/kapitel/led_auf_shield.tex
index 7913887..46e2da0 100644
--- a/Vorträge/arduino/kapitel/led_auf_shield.tex
+++ b/Vorträge/arduino/kapitel/led_auf_shield.tex
@@ -168,9 +168,31 @@
 
 
 \begin{frame}
-    \frametitle{Grundlagen -- Widerstand}
-    %TODO: Widerstandsringe erklären
-    
+    \frametitle[fragile]{Grundlagen -- Widerstand Farbcode}
+    \begin{columns}[T]
+    \column{.90\textwidth}
+    \scriptsize{\begin{tabular}{|l|c|c|c|c|c|r|}
+    \hline \textbf{Farbe} & & \textbf{1. Ring} & \textbf{2. Ring} & \textbf{3. Ring} & \textbf{Muliplizierer} & \textbf {Toleranz} \\ 
+    \hline scharz  & \cellcolor{black}   & 0 & 0 & 0 &    1$\Omega$ &              \\ 
+    \hline braun   & \cellcolor{brown}   & 1 & 1 & 1 &   10$\Omega$ &     $\pm$1\% \\ 
+    \hline rot     & \cellcolor{red}     & 2 & 2 & 2 &  100$\Omega$ &     $\pm$2\% \\ 
+    \hline orange  & \cellcolor{orange}  & 3 & 3 & 3 &   1K$\Omega$ &              \\ 
+    \hline gelb    & \cellcolor{yellow}  & 4 & 4 & 4 &  10K$\Omega$ &              \\ 
+    \hline grün    & \cellcolor{green}   & 5 & 5 & 5 & 100K$\Omega$ &   $\pm$0,5\% \\ 
+    \hline blau    & \cellcolor{blue}    & 6 & 6 & 6 &   1M$\Omega$ &  $\pm$0,25\% \\ 
+    \hline violett & \cellcolor{violet}  & 7 & 7 & 7 &  10M$\Omega$ &  $\pm$0,10\% \\ 
+    \hline grau    & \cellcolor{gray}    & 8 & 8 & 8 &              &  $\pm$0,05\% \\ 
+    \hline weiß    & \cellcolor{white}   & 9 & 9 & 9 &              &              \\ 
+    \hline gold    & \cellcolor{gold}    &   &   &   &  0,1$\Omega$ &     $\pm$5\% \\ 
+    \hline silver  & \cellcolor{silver}  &   &   &   & 0,01$\Omega$ &    $\pm$10\% \\ 
+    \hline 
+    \end{tabular}}
+    \column{.10\textwidth}
+    \begin{center}
+    \includegraphics{bilder/resistor_220.pdf} \\
+    220$\Omega$
+    \end{center}
+    \end{columns}
 \end{frame}
 
 \begin{frame}