Zynaptik-1 Expander Kit
This kit include the parts needed for adding all the extra features to your legacy zynaptik-1 module:
-MCP23017: 16 digital I/O pins, usable for Gate in/out
-ADS1115: 4 analog input pins, usable for CV-in -MCP4728: 4 analog output pins, usable for CV-out