Connect Amp to Feather
Solder the following wires to connect the I2S amplifier to the Feather ESP32 V2.
- LRC pin to RX pin on Feather ESP32
- BCLK pin to TX pin on Feather ESP32
- DIN pin to 14 pin on Feather ESP32
- GND pin to GND pin on Feather ESP32
- VIN pin to USB pin on Feather ESP32
- GAIN pin to GND pin on MAX98357A
Connect Speaker to Amp
Insert the red wire from the speaker to the positive + terminal on the amplifier screw block. Insert the black wire from the speaker to the negative - terminal on the amplifier screw block.
Tighten the screws to secure the wires. A gentle tug on a wire helps to ensure the wire is held by the terminal block.
Secure Feather
Use two M2.5 x 6mm long machine screws to secure the Feather to the 3D printed PCB mount.
Orient the Feather with the PCB mount and place it over the mounting holes.
Fasten the two machine screws to secure the Feather to the PCB mount.
Secure Amplifier
Use two M2.5 x 6mm long machine screws to secure the amplifier to the PCB mount.
Orient the amplifier with the PCB mount and place it over the mounting holes.
Fasten the screws to secure the amplifier to the PCB mount.
Secure Speaker
Use two M3 x 10mm machine screws and hex nuts to secure the speaker to the PCB mount.
Place the PCB mount over the mounting tabs of the speaker with the mounting holes lined up.
Insert and fasten the M3 screws to secure the speaker to the PCB mount.
Assembled PCB Mount
Take a moment to ensure all of the components have been tightly secured to the PCB mount.
Install PCB mount
Use four M3 x 6mm long machine screws to secure the PCB mount assembly to the speaker enclosure.
Place the PCB mount into the speaker enclosure and line up with standoffs with the mounting holes.
Secure PCB Mount
Hold the PCB mount while fastening the four M3 screws through the bottom of the speaker enclosure.
Installed Components
Take a moment to ensure the PCB mount has been correctly installed into the speaker enclosure.
The USB-C port from the Feather should be accessible on the back side of the speaker enclosure.
Speaker Grill Fabric (Optional)
A piece of black felt can be used to cover the back side of the speaker grill. The fabric can be attached to the speaker grill using fabric tape strips.
Cut Fabric
The felt can be cut using a crafting hobby knife. The speaker grill cover can be used as a template.
Place the speaker grill over the sheet of felt. Carefully cut the piece of felt using the grill as a guide.
Cut Tape Strips
Use scissors to cut thin strips of fabric tape. Six cut pieces of tape is applied to the edges of the speaker grill cover.
Adhere Felt
Carefully peel away the backing from the strips of tape. Place the cut piece of felt over the speaker grill and press down on the edges to adhere the fabric to the speaker grill.
Install Speaker Grill
Orient the speaker grill with the speaker enclosure. The back side of the grill features nubs that will snap into matching notches on the speaker enclosure.
Press the speaker grill into the speaker enclosure.
Page last edited March 24, 2025
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