they are just digital (0,1). you need a A/D converter if you want to read analog signals. Here's a tutorial on hooking the raspberry pi with one of those chip

they are just digital (0,1). you need a A/D converter if you want to read analog signals. Here's a tutorial on hooking the raspberry pi with one of those chips to give you analog input: http://learn.adafruit.com/reading-a-analog-in-and-controlling-audio-volume-with-the-raspberry-pi/overview http://learn.adafruit.com/reading-a-analog-in-and-controllin...