 # 12V pot into motor shield?

I've got an linear actuator (12V, 2A) that i'm trying to control with a monster moto shield.

The potentiometer from the actuator gives back the position of the actuator by supplying a voltage. How can I get the arduino to read this? Since the arduino only handles 5V input? Voltage divider? Or does the monster moto shield have something built in?

https://www.sparkfun.com/products/10182

http://www.transmotec.se/download/Linear-Actuators/DLA-Series/Complete-DLA-Series-Actuator-Catalogue.pdf

Yes you'll need a voltage divider, no the shield doesn't have a voltage divider (how could it, it cannot guess the voltage you will be using!)

For 12V down to 5V (and assuming the supply is a lead acid battery which goes up to 14V), use a 18k, 10k divider which divides 12V down to 4.29V. You may need two dividers, one for the supply voltage and one for the pot output, in order to be accurate in the face of supply voltage changes (if its a battery).

MarkT: Yes you'll need a voltage divider, no the shield doesn't have a voltage divider (how could it, it cannot guess the voltage you will be using!)

For 12V down to 5V (and assuming the supply is a lead acid battery which goes up to 14V), use a 18k, 10k divider which divides 12V down to 4.29V. You may need two dividers, one for the supply voltage and one for the pot output, in order to be accurate in the face of supply voltage changes (if its a battery).

Alright cool, thanks! So say I hooked everything up and want to read the value of the potentiometer. Is AnalogReadSerial a possible way to go? http://arduino.cc/en/Tutorial/AnalogReadSerial

Would the code work out of the box? Simply put the pots output to the A0 pin on the arduino and then print a value to the serial monitor?

The "knob" servo code example in the arduino IDE shows basic pot input to the arduino. Instead of using resistors for a voltage divider, could just use another pot, which is actually an adjustable voltage divider.