Universal NPN-PNP INDUCTIVE SENSOR Auto bed level opto isolator interface board
thingiverse
** UPDATE 29/10/2016 Now available pcb boards .. When adding an auto bed level inductive sensor.. you will face the problem how to interface it with your controller such as ramps or other .. Thanks for Dennis Brown for the idea of using the opto coupler circuit, l i designed this board to connect the inductive sensor to 12 volt rail and extract the 5 volt signal when active ! i modified the controller end to include a resistor which is used to pull up the opto.. Fully configurable to NPN and PNP inductive sensors circuit diagram updated ! Available as a kit on my tindie page ..
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