added first circuit example

circuits/simple-example/Makefile

@@ -0,0 +1,31 @@
+SOURCE = simple-example
+DELAY = 80
+DENSITY = 300
+WIDTH = 500
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg

circuits/simple-example/simple-example.tex

@@ -0,0 +1,18 @@
+\documentclass{article}
+\usepackage[pdftex,active,tightpage]{preview}
+\setlength\PreviewBorder{0mm}
+
+\usepackage{circuitikz}
+
+\begin{document}
+\begin{preview}
+  \begin{circuitikz}
+    \draw (0,0) node[european and port] (myand){}
+      (myand.in 1) node[anchor=east]{P} 
+      (myand.in 2) node[anchor=east]{Q} 
+      (1.8,0) node[european not port] (mynot){}
+      (mynot.out) node[anchor=west]{S}
+      (myand.out) -- (mynot.in);
+  \end{circuitikz}
+\end{preview}
+\end{document}