Prusa i3 Auto Bed Leveling
I made a nice upgrade for my good old Prusa i3.
Auto bed leveling with an inductive sensor (NPN).
http://www.ebay.de/itm/271696655289?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
The sensor works fine with 5V, so I could join him directly at the Zmin connection.
I use a e3d v6 lite Hotend.
I made the following changes in my config.h file.
http://www.thingiverse.com/download:2479376