OPTO mini optical probe

You only need
------optical endstop from old ink printer or optical endstop for 3d printer but with modified ...grinded plastics (not all reprap works without modification),make sure it have around 4mm space for steel rood to pass
-----3mm steel rod ,
-----pencil spring
------and 5x6x2mm neodymium magnet (or smaller)

both steel rod and neodymium magnet u can find in any PC cd-dvd driver and most of the time in any other cd dvd driver like in old radio etc



-----Steel rod lenght