Let's start by putting together our CLUE Milk Freshness Checker. The CLUE and SGP-30 are the key parts. For the other items, we used some things that can hopefully be found laying around the house. If not, feel free to substitute for whatever is available to achieve the same general arrangement.
Put a piece of double sided tape about the same size as the SGP-30 at one end of the popsicle stick.
Use the rubber band to secure the CLUE and battery to the other end of the popsicle stick.
Plug in the Stemma QT cable and battery.
Now move on to setting up the CLUE for CircuitPython usage and loading the code. It comes with some preset values we determined in our testing. We'll cover how you can alter these later.