Will a 1S LiPo battery work okay with the Arduino Uno, or do I need to use a 2S and a 5 volt VR?
The Arduino Uno runs at 16Mhz, which requires about 5V. There are 3.3V Arduinos that run at 8Mhz, which would work great on a single lipo cell.
Okay, thanks. Do you think the 0-3.3volts from a 10k potentiometer wiper in the topside control box will work through 200 feet of 24AWG for a readAnalog() input to the Arduino?
Sure it will as long as you don’t have much current going through it. It will also be susceptible to noise if there is something noisy going on in a nearby wire.
If you use a 1K resistor to limit the current output from the potentiometer, then worst case you’d have 3.3V / 1000 ohm = 0.0033 A of current. According to this voltage drop calculator, that would result in a voltage drop at the end of 0.034 volts, which would barely affect your analog reading on the Arduino.