The KATARA Microfluidics controller consists of a shield for Arduino Mega for driving 70 solenoid valves, a python package and GUI for controlling the arduino, and an arduino programs that recieves signals from the python package.
The printed circuit board designs are posted on EASYEDA: https://easyeda.com/jwhite2/Driver_Shield_for_Arduino_Mega-479918a931264dbdaa817511dac3210f
A preprint in BioRxiv describes the project in detail: http://www.biorxiv.org/content/early/2017/09/14/188615