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Audio Amplifier

Overview

The component AUDIO AMPLIFIER of the ESP board includes the MAX98357A, a digital 3W Class D Audio Amplifier. This amplifier provides an digital pulse-code modulation (PCM) input supporting I2S data and delivers a 3.2W output power into 4Ω (4 Ohms) at 5V. It accepts specified sample rates between 8kHz and 96kHz for all supported data formats.

Example

An example project for the Arduino IDE can be found in the chapter for the microphone.

ESP Board Audio Amplifier
SW306

Activating the component

The component has the dip switch SW306 for activating the component.

Function SWITCH IO port Conflicts with Remarks
SD_MODE SW306-1 16 mikroBus, SW404-3, RX; Camera, SW403-2, WRST; Unit-Bus, SW201-1, CN212 - PIN 3; Grove UART, SW202-2, UART TX
BCKL SW306-2 26 MENU, SW401-3, LEFT; Camera, SW402-6, D4
LRCLK SW306-3 25 MENU, SW401-2, DOWN; Camera, SW400-1, D5
DIN SW306-4 22 mikroBus, SW404-5, SCL; Camera, SW400-6, SIOC/SCL

Using the component

Connect your 4Ω speaker at connector J300 at P and N.

Sample project

An example project for the Arduino IDE can be found in the chapter for the microphone.