Encoder 4109 or 3531 with Arduino

[jingleby]

Any suggestions on how to use one of the encoders mentioned above within an arduino world (even with a dedicated arduino for it)?

Would the 4109/3531 also require additional phidgets hardware? I'm hoping to get by with only the sensor and as I have 2 on hand. If this is an incredibly difficult task, what is the lowest cost components that would be needed?

thanks

[mparadis]

Quadrature encoders like these are simply 2 digital signals that need to be interpreted in a certain way. A cursory google search yields this page which lists a number of libraries that will do it:
https://playground.arduino.cc/Main/RotaryEncoders

[jingleby]

Thank you for clarifying this. I suspected as much but wasn't sure and was surprised I didn't find tutorials with phidgets about it.