Located in the center of the board is the 1 watt 8 ohm speaker connected to the board via a Molex PicoBlade connector.

The easiest way to connect the STEMMA speaker to your project is the 3-pin JST connector at the base of the board. There are 3-pin JST to various connectors available, including to alligator clip and breadboard pin options, to make it super easy to connect it to any kind of project.

• White Signal (SIG) This is 0-3V signal input, we decouple this signal so it can be AC or DC coupled.
• Red Power (+) This is 3-5V DC power
• Black Ground (-) Signal/power ground

The STEMMA speaker comes with three alligator clips pads to use with alligator clips. In the image to the left, they are top to bottom:

• Signal (SIG) This is 0-3V signal input, we decouple this signal so it can be AC or DC coupled.
• Power (+) This is 3-5V DC power
  
• Ground (-) Signal/power ground

You can change the volume using a small screwdriver to rotate the volume trim pot.

The board includes a class D amplifier located above the JST connector.