Diagram for capacitive sensor with optocoupler module

thingiverse

Diagram of connection of the capacitive sensor, for the autolevel function, with an optocoupler module. Sometimes, i was asked for the best auto level system, for a Anet A8, or P3Steel printer. No doubts, for me a capacitive sensor with a optocoupler module. The LJC18A3-H-Z/BX, capacitive sensor, because, is adjustable from 1 to 10mm, no matter the material to detect. With Aluminium or glass, is good. The optocoupler module, is easy, i'm not trust with a simple circuit with a diode, or a tension divider, with a couple of resistors. I need to protect my mainboard, and this way is cheap and easy. I have, also a design , a little box, to encapsulate the optocoupler module. Still working in this. This items, can be found at: [LJC18A3-H-Z/BX 1-10mm Capacitance Proximity Sensor Switch NPN](https://es.aliexpress.com/item/High-Quality-LJC18A3-H-Z-BX-1-10mm-Capacitance-Proximity-Sensor-Switch-NPN-NO-DC-6/32735795048.html) [12V 1 Channel Optocoupler.](https://es.aliexpress.com/item/1-Channel-Optocoupler-Isolation-Module-Input-12V-No-Din-Rail-Holder-PLC-Processors-80KHz-PC817-EL817/32719957788.html) I am not affiliated or do I get any commission from aliexpress. <b>UPDATE 02/04/2019:</b> Included electronic scheme of the optocoupler module <b>UPDATE 01/10/2019:</b> Although it was never the purpose of this "thing", attached detailed photos of the circuit for those who want to do it themselves. <b>UPDATE 05/16/2018:</b> Case for optocoupler module is avalaible: https://www.thingiverse.com/thing:2914665 <b>UPDATE 06/01/2018:</b> Check the pins on your motherboard, it may not correspond to the one shown in the diagram.