This is a schematic diagram to clearly show the connections between components with minimal wire crossings — it does not represent the actual placement around the collar.

One of the sequins is always on, sliced from the battery pack. The other is connected to an analog out on the Bluefruit Micro, so we can trigger it to light up when the sound is triggered to create a "talking" light.

We strongly recommend prototyping this project on a solderless breadboard first, if you can spare the second set of parts (the collar is assembled without header pins). When assembling things into the collar, things can get a bit confusing, so it's always nice to have a working version of the circuit to reference!