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 depend where you mount the probe and can be adjusted

-----remember to add some wire etc working as latch around 3mm from top of the rod or it will fall down (like on photo)

----steel rod need to be cut untill it hide when the nozzle is 1-2mm from the bed (depend of rod lenght and magnet strenght if it can pull it up eaarlier etc

----Print it using only black plastic and remember to use endstop cover

----- any light change = around 0.2mm error in measures.

---- paint the rod end