After you determine that your voltage will be below 5V, or can be divided down to remain under 5v, than you can connect it to one of the analog inputs,
value = analogRead (A0);
for example, and then send it via serial/usb connection to the PC and see it on the serial monitor in the IDE:
Serial.print("motor value ");
Serial.print (value, DEC); // result will be a number from 0 to 1023 with 1 = ~4.89mV (or, 5V/1023).
If you want it as a voltage, multiply it out, see FLOAT type variables in the reference section
float voltage = ((value/1023)*5); // does the math with decimal places
Serial.print (voltage, 2); // prints a number with 2 decimal places, ex 4.35
This presumes you have the basics of your sketch setup also, which I didn't go into.
man thanks alot for this! Well I've got the gist of making a voltage divider but so far for the basic sketch setup I don't have a clue. I mean I know how to make an LED blink and set it up to do it without any help but how can I setup the sketch for this project?
BTW thanks TONS for this your really putting some effort into helping me and I appreciate it.