The Analog Output Ribbon Controller is a resistive ribbon controller with a Nano-based interface. It outputs the position of the contact on the ribbon controller as a voltage between 0 and 5 V (two copies of this voltage are output), and a gate which is on or off depending on whether there is contact or not with the ribbon.
The controller itself was built along the lines of the one here:
http://synthhacker.blogspot.com/2016/04/diy-ribbon-controller-cv.html
Other resistive ribbons should also be usable.
The interface is based on my dac/ino lite circuit board. Power is provided by a 9 V battery; there is a toggle switch to turn power off and on.