I'am want to connect long-distance sensors with the Arduino, about 50 meters.
I have two options (sceneries): "A" and "B" to choose, especially the "B"
-> Scenario "A":
Arduino Uno connected to an on-off switch via digital port, diagram below:
The blue wire in the figure extends for about 50m.
- Would a 2.5mm2 electrical conductor work well? Would it have to be a Cat5 cable?
- In the Schematic I use PullDown, a 10K resistor would be suitable?
- Would switching to PullUp make any difference?
-> Scenario "B":
Arduino Uno connected to an Ultrasonic sensor (SR04 or similar) via digital port, diagram below:
In this case, would a Cat5 cable work?