I wanted to know whether this microphone is compatible with the Sparkfun’s Audio Codec. The microphone features a 3.5mm jack. Can it be used with Sparkfun’s TRRS Jack breakout and if so what connections should I be making.
Link for the IEPE Microphone ( Integrated Electronics Piezo-Electric )
https://roga-instruments.com/downloads/ … -PC-EN.pdf
Link for the Sparkfun’s WM8960 Breakout board
https://www.sparkfun.com/products/21250
Link for the TRRS Breakout board
Yes, you can use this microphone with Sparkfun’s Audio Codec and connect it to the WM8960 Breakout board as follows:
Connect the ground wire of the IEPE Microphone to any ground pin (GND) on the TRRS jack breakout board.
Connect the signal wire of the IEPE Microphone to the IN2 pin on the TRRS jack breakout board.
Connect the microphone’s 3.5mm jack to one end of a 1/4" audio cable, and connect the other end to the TRRS jack breakout board’s AUX_L/R input (or IN1/IN2) pins.
Connect the 3.5mm jack’s sleeve wire to any ground pin on the TRRS jack breakout board.
Remember to connect the correct signal wire depending on the orientation of your microphone. If you have a metal casing, you can use IN2, as it has the highest impedance and can handle the signal without causing interference with other devices connected to the WM8960. Alternatively, if you have a plastic casing, you may want to use IN1 for better noise reduction.
For the TRRS breakout board, it is recommended that you connect the audio source directly to the AUX_L/R input (or IN1/IN2) pins instead of using the 3.5mm jack. The TRRS breakout board can be used as a standalone adapter or for further signal processing and mixing.
Make sure to check the WM8960 datasheet for more information on the microphone connections.
@TS-RUSSELL Just to make sure, I wanted to let you know that the microphone is a two wire microphone where the microphone is powered and signal is taken from same positive wire and then the other wire is ground.
so do i need to connect to some biasing voltage or something?
Also the Microphone mentioned works on 5 volts, do I need to use SparkFun Bi-Directional Logic Level Converter to covert it into 3.3 volts making it compatible with WM8960. How do I make the connections here.
Please note that I am not using TRRS connector for now and will be directly connecting…
That mic is an electret. It needs a bias voltage. You would connect the shield to ground, and the center conductor to 5v thru a current limiting resistor (try 2.2k or so). You would also connect the center conductor to the WM8960 through a DC blocking capacitor. You would not need the logic level converter (it won’t help since you are not dealing with digital logic level signals)