The audio source connects to the IN+ and IN- pins of the PAM8403 board to receive the input signal.

The OUT+ and OUT- pins on the PAM8403 board are used to connect the speakers or headphones, where the amplified signal is output.

You can adjust the volume using the onboard volume knob.

Supplies

Components needed for using the PAM8403 amplifier board include:

PAM8403 amplifier board
Power source (e.g., battery or AC adapter)
Audio source (e.g., phone or computer)
Speakers or headphones
Wires for connecting components

Step 1: Connect Power Source

Connect the power source to the PAM8403 amplifier board. Ensure that the voltage supplied falls within the board's accepted range of 2.5V to 5V. You have the option to use either a battery or an AC adapter as the power source.

Step 2: Connect Audio Source

Connect the audio source to the PAM8403 amplifier board using a 3.5mm audio cable. To establish this connection, link your phone or computer to the board, ensuring that the audio input is correctly attached to the IN+ and IN- pins on the board.

Step 3: Connect Speakers or Headphones

Connect your speakers or headphones to the PAM8403 amplifier board using wires. To establish this connection, link the positive and negative leads of your speakers to the corresponding OUT+ and OUT- pins on the board. Ensure the polarity is correct for proper audio output.

Step 4: Power on the Board

Power on the board by activating the connected power source. Observe the LED indicator on the board; it should illuminate, signaling that the board is successfully receiving power.

Step 5: Adjust Volume

To adjust the volume, utilize the volume knob located on the board. Begin with the volume set to a lower level and then incrementally increase it until you attain your preferred audio volume.

Step 6: Enjoy Your Audio

Once all components are properly connected and the power is activated, you should be able to enjoy your audio through either your speakers or headphones. If you encounter any sound-related issues, take a moment to recheck your connections and ensure that everything is securely plugged in.

The PAM8403 amplifier board is a fantastic tool for improving audio quality in various setups. However, before integrating it into your devices, take the time to conduct compatibility checks. Verify that your power source, audio input, speakers, and audio source are all in harmony with the PAM8403 datasheet. By doing so, you'll ensure that your audio project not only sounds great but also operates safely and efficiently.