Hello - I am planning on using a capacitive sensor to check when a part is present before an activity happens. I am looking at an NPN version (LJC18A3-H-Z/BX) to sense the part. The part is a plastic bottle. I see information on hooking the sensor directly to an Arduino and I also see a lot of people that have added auto leveling to 3d printers and they have put in an opto-coupler to protect their board. Does anyone have an thoughts either way?
Thank you,
Anthony
Sure, if You provide links to the datasheets of Your stuff.
IMO, when distances are large, suggest you use an opto-isolator.
If distances are short a simple Schottky diode is sufficient, a common silicon diode should work also.
This is on of the sensors I am looking to use. [LJC18A3-B-Z/BX M18 8mm sensing DC 6-36V NPN NO capacitive proximity sensor]
The distances will be pretty short. The bottle is fixtured and will rotate in place and the sensor can be a few mm away.
As stated, if the controller is close by, use a Schottky diode.
Will do - thank you
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