Images folder (pictures)

This folder is for images, this can be pictures,created graphs, sketches or circuit diagramms. It is recommended to work with .png and .pdf filetypes for inclusion in the main document, but files needed by the respective editors may also be stored here.

Image creation with Inkscape

Inkscape is a amazing vectorgraphics tool with an export to LaTex feature. I highly recommend it for creating complex images like sketches of experimental setup.
Check oute their website: Inkscape.org