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.