32:2 diagnostic mux for Fastino

[gkasprow]

Initial spec:

• 32:2 mux that allows continous impedance/continuity/crosstalk measurements of the entire chain from Fastino down to ion trap using VNA/Impedance meter without disconnecting from Fastino.
• relay control: SPI over EEM/DIOT or USB via Arduino nano/RPI
• DIOT form factor with EEM assembly option
• stand-alone operation (USB+12V supply)

[gkasprow]

Partially assembled and working board

[gkasprow]

All relays assembled