Circuit Documentation

Summary of the Circuit

This circuit is designed to interface a speaker with an audio source through a PAM8403 amplifier module. The PAM8403 is a stereo audio amplifier capable of driving a pair of speakers with up to 3W of power each. The audio source is connected via a 3.5mm audio jack, which provides left and right audio signals to the amplifier. The amplifier then drives a single speaker with one of its stereo outputs. The ground connections are shared among the components to complete the circuit.

Component List

Speaker

• Description: A transducer that converts electrical signals into audible sound.
• Pins: + (Positive), - (Negative)

PAM8403

• Description: A stereo Class-D audio amplifier module.
• Pins: 5vIN+ (5V Power Input Positive), GND/IN- (Ground/Power Input Negative), R-INPUT (Right Channel Input), GND (Ground), L-INPUT (Left Channel Input), L- (Left Channel Output Negative), L+ (Left Channel Output Positive), R+ (Right Channel Output Positive), R- (Right Channel Output Negative)

3.5mm Audio Jack 3 Pin

• Description: An audio jack for stereo audio input using a 3.5mm plug.
• Pins: L (Left Channel), R (Right Channel), GND (Ground)

Wiring Details

Speaker

• Positive (+): Connected to the L+ pin of the PAM8403.
• Negative (-): Connected to the L- pin of the PAM8403.

PAM8403

• 5vIN+: Not connected in the provided net list.
• GND/IN-: Not connected in the provided net list.
• R-INPUT: Connected to the R (Right Channel) pin of the 3.5mm Audio Jack.
• GND: Connected to the GND (Ground) pin of the 3.5mm Audio Jack.
• L-INPUT: Connected to the L (Left Channel) pin of the 3.5mm Audio Jack.
• L-: Connected to the - (Negative) pin of the Speaker.
• L+: Connected to the + (Positive) pin of the Speaker.
• R+: Not connected in the provided net list.
• R-: Not connected in the provided net list.

3.5mm Audio Jack 3 Pin

• L (Left Channel): Connected to the L-INPUT pin of the PAM8403.
• R (Right Channel): Connected to the R-INPUT pin of the PAM8403.
• GND (Ground): Connected to the GND pin of the PAM8403.

Documented Code

No microcontroller code was provided in the input. Therefore, this section is not applicable to the current circuit documentation. If in the future the circuit is updated to include a microcontroller, the code will be documented in this section.