I have a fairly simple circuit. I am using an anemometer that sends a voltage based on the wind speed. Voltage - 10 volts = wind 0 to 30 mps. I created a simple voltage divider to get the read voltage under the 4.8V that I am running the Arduino. Question is, will a long 18 gauge wire have a voltage drop that may effect the read voltage? Using an MCP3208.
I figure that I can easily set up a calibration routine that I put 10 volts (or any verified voltage) on the far end of the wire. Then using the measured voltage and the expected voltage, I can calculate the ratio of the voltage divider and use this value for converting the MCP2308 read voltage. This way if I move the anemometer (shorten or lengthen the wire) I can run the calibration and get my new ration.
Is this thinking sound? I can do all the programing, just want to make sure my logic is right.