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Topic: Does input via optocoupler need a pullup resistor ? (Read 2 times) previous topic - next topic


the cables from my central board to the sensors can be up to 40 meters ( 120 ft ) and I was concerned about anything that could happen over that distance, and what quality of signal could be returned to the Arduino. <snip> I have already seen monkeys chewing wiring in the area, so must plan for that possibility.
Raising the voltage might be beneficial for both of these situations.  ]:D

Sorry, couldn't help myself.... :smiley-red:


I did see a few move a bit faster when they discovered the new electric fence a few months back, so that definitely gets their attention.

Do you think that 8000V to the Arduino would be a problem  :) ?


Not if you use the opto coupler correctly.  :D

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