Resistance Measurement

ProbleM Measure four resistance values for each straw in a pallet Inside-Inside Outside-Outside Inside-Outside Outside-Inside How can this process be automated? Measuring by hand takes ~45 minutes per pallet Plan to design PCB (printed circuit board) to use with an Arduino unit for logic I O

Straw Contacts I O I O I O I O Copper Tape

Circuit Design Demultiplexer  Inverter  Quad Bilateral Switch (Input from straws, outputs tied together to DMM Currently testing design to implement on a few straws before designing PCB