Hardware for PDM Mic

Use the following hardware to secure the PDM mic to the 3d printed strip cover.

  • 2x M2.5 x 6mm screws
  • 2x M2.5 hex nuts

Secure PDM mic

Insert the M2.5  screws through the two holes on the strip cover. Place the PDM mic over so the screws fit through the two mounting holes. Insert and fasten the two hex nuts to secure the PDM mic to the strip cover.

Connect PDM Mic Cable

Ensure the 4-pin cable is connected to the PDM microphone.

Installing QT Py

Get the QT Py ready to install onto the strip cover. Orient the strip cover so the built-in holder is lined up with the USB port on the QT Py.

Install QT Py

Insert the QT Py into the built-in holder at an angle with the corners of the PCB fitting under the clips.

Double check the USB-C port is facing the correct orientation.

Slightly flex the strip cover to allow the QT Py PCB to fit into the corners of the built-in holder.

Install LED Acrylic to Case

The black LED acrylic is press fitted into the case with the shinny side facing up and the matte side facing down.

Press the acrylic so it's flush with the bottom surface of the case.

Install Grid into Case

Place the grid into the case with the closed bottom frame going in first and the recesses facing up. 

Firmly press the grid into the case so it sits flush with the LED acrylic.


Prep NeoPixel Strip

Place the NeoPixel strip over the back of the strip cover.

The cable should be tucked under the PDM mic for a nice installation.


Install NeoPixel Strip

Begin to lay the NeoPixel strip over the recesses on the grid.

The NeoPixel strip should be placed with the LEDs fitting into the slots.

The strip cover will be placed over the NeoPixel strip and press fits into the case.

Install Strip Cover to Case

Double check the USB C port from the QT Py is orientated correctly with the case.

Firmly press the strip cover into the case with the QT Py and PDM mic facing up.

Install Back Cover

Get the back cover ready to install over the case.

Orient the back cover so the notch end is lined up with the USB C port on the QT Py.

Firmly press fit the back cover over the case and snap fit to close it shut.

USB C Port

Double check the USB C Port from the QT Py is accessible.

Final Build

Congratulations on your build! It's ready for some audio input.

Use a USB cable and a 5V power source to power the VU meter.

This guide was first published on Feb 01, 2022. It was last updated on 2022-02-01 12:22:02 -0500.

This page (Assembly) was last updated on May 15, 2022.

Text editor powered by tinymce.