This is my first post here and a newbie at the arduino. I bought to read my air pressures on my air bags on my 1950 cadillac. I have a moderndevice 20x4 LCD with the serial backpack on it. But my question is how do i wire up the senders? I bought Dakota Digital Sen-03-1. They have 2 pins on the back. One is for ground and one is for their gauges (which I don't have, making my own lcd). How do i go about making these sensors send information to my arduino on the analog pins?
Thank you again for your help. Great site and product.
You may need to ask Dakota Digital: they don't have detailed specs for the sender on their website.
An alternative, if you have access to an air compressor (and are feeling lucky :)), is to hook up the sensor and see what it puts out at different pressures. It seems likely that it's a variable resistance to ground, but that's mostly a guess.
Put a voltmeter across the terminals and pump it up. If you don't see a voltage, switch to Ohms, and see whether the resistance varies with pressure. The odds are just about zero that the tiny amount of current out of an ohmmeter will cause any damage, regardless of what's inside the sensor.