You can use the case lid as a jig for wiring up the components.

Solder a wire from the amp's Vin to the Feather's 3.3V (red wire).

Solder a wire from the mic's 3V to the Feather's 3.3V (red wire)

Wire the mic data lines to the Feather:

• Mic BCLK to Feather D5 (blue wire)
• Mic DOUT to Feather D9 (yellow wire)
• Mic LRCL to Feather D6 (green wire)

Wire the amp data lines to the Feather:

• Amp LRC to Feather D11 (blue wire)
• Amp BCLK to Feather D10 (yellow wire)
• Amp DIN to Feather D12 (green wire)

Connect the button LED GND to the button GND. The LED GND is marked with a raised minus (-) symbol.

Mount the toggle switch and the push button into the case.

Solder a wire to the Feather GND pin. Insert the other end of the wire into the GND pin on the amp, but don't solder it yet.

Take a second wire and solder it into the GND pin on the amp. This solders both GND wires in place. The wire should be long enough to reach the toggle switch.

Solder the other end of the GND wire to the center pin on the toggle switch.

Wire the toggle switch GND pin to the push button GND pin. Run the wire behind the Feather stand-offs. This will help with wire management when closing up the case.

Solder a second wire to the LED GND on the push button.

Solder the other end of the wire to GND on the microphone.

Solder a wire to the push button output pin (blue wire).

Solder the other end of the wire to Feather D13.

Solder a wire to the LED positive pin (+) on the push button (yellow wire).

Solder the other end of the wire to Feather pin A0.

Solder a wire from the third pin on the toggle switch to EN pin on the Feather (green wire).