4-pin Cable

Use the 4-pin cable to connect the PDM mic to the QT Py. This cable features header pins that are not needed.

Wire Mic Cable to QT Py

Cut the header pins from the wires so the cable has a length of about 114mm (4.5in).

Using wire stripper, remove a bit of insulation from the tips of each wire. Tin the tips of the wires by adding a bit of solder. This helps prevent the strands of wire from fraying.

Connect Mic Wires to QT Py

Solder the four wires from the cable to the pins on the QT Py. Follow the list to reference which wires go where.

  • Red Wire – 3V pin on QT Py
  • Black Wire – GND pin on QT Py
  • Yellow Wire – TX pin on QT Py
  • Blue Wire – A1 pin on QT Py

Connect & Check Wiring

Plug in the JST connector from the cable to the JST port on the PDM mic. Double check the wires are properly soldered to the pins on the QT Py. 

Cut NeoPixel Strip

Locate the end of the strip with the Data In arrow marking.

Count 16 LEDs from the Mini Skinny NeoPixel strip and cut in between the marked pads.

Double check the strip has the correct number of NeoPixels.

Wire for NeoPixel Strip

Use the 10-wire ribbon cable to create a 3-wire cable for connecting the NeoPixel strip to the QT Py.

Measure and cut a piece of ribbon cable so it's about the length of the strip of NeoPixels.

Using wire stripper, remove a bit of insulation from the tips of each wire. Tin the tips of the wires by adding a bit of solder.

Solder Cable to NeoPixel Strip

Locate the end of the NeoPixel strip with the DATA IN pad.

Solder the wires from the cable to the three pads on the back of the NeoPixel flexible PCB.

Reference the labels for soldering the wires to the correct pads.

Wired NeoPixel Strip

Double check the cable has been properly soldered to the pads on the NeoPixel strip.

Get the QT PY ready to solder the NeoPixel three wired connections.

Connect NeoPixel to QT Py

Solder the three wires from the NeoPixel strip to the pins on the QT Py.

  • 5V from NeoPixel – 5V on QT Py
  • GND from NeoPixel – GND on QT Py
  • DIN from NeoPixel – A0 on QT Py

Final Wire Check

Double check the wires from the NeoPixel strip has been properly soldered to the QT Py.

Test the circuit by plugging a USB cable to a 5V power source.

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

This page (Wiring) was last updated on May 24, 2022.

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