HS-F33-L Audio Amplifier Module

1. Introduction

An audio amplifier module is an electronic module used to enhance the power of audio signals, which can amplify weak audio electrical signals (such as signals output from microphones, players), and boost the voltage and current strength of the signal, making the sound louder and clearer.The amplified audio signal is output from the module, connected to speaker and other load devices, driving the load to emit sound.Note: The UNO development board does not have enough performance to drive this module.

2. Schematic

MAX98357 audio amplifier module - HS-F33-L schematicClick to view

Module Parameters

• Power supply voltage: 3.3-5V

• Connection method: PH2.0 4P terminal wire

• Installation method: Modular fixed

4, Circuit Board Size

5 of Arduino IDE example program

Attention: If prompted with an error message about the library file during program upload, please import the library file first!
Arduino IDE Library Download and Import Tutorial:Click to view

Example Program (ESP32 Development Board):

#define SAMPLE_RATE (44100)
#define I2S_MIC_WS (12)
#define I2S_MIC_SD (14)
#define I2S_MIC_BCK (13)
#define I2S_PORT_0 (I2S_NUM_0)
#define bufferLen (1024)
#define SAMPLE_RATE (44100)
#define bufferLen (1024)
#define I2S_SPK_DIN (25)
#define I2S_SPK_BCLK (27)
#define I2S_SPK_LRCLK (26)
#define I2S_PORT_1 (I2S_NUM_1)
#include "Arduino.h"
#include "driver/i2s.h"
#include "Arduino.h"
#include "driver/i2s.h"

int16_t sBuffer_RX[bufferLen];
size_t bytesIn = 0;
int16_t sBuffer_TX[bufferLen*2];
size_t bytesOut = 0;

void I2s_Mic_Init()
 {
   i2s_config_t i2s_config_RX{};
   i2s_config_RX.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX);
   i2s_config_RX.sample_rate = SAMPLE_RATE;
   i2s_config_RX.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT;
   i2s_config_RX.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT;
   i2s_config_RX.communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB);
   i2s_config_RX.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1;
   i2s_config_RX.dma_buf_count = 8;
   i2s_config_RX.dma_buf_len = bufferLen;
   i2s_config_RX.use_apll = false;
   i2s_driver_install(I2S_PORT_0, &i2s_config_RX, 0, NULL);
   i2s_pin_config_t pin_config_RX{};
   pin_config_RX.mck_io_num = I2S_PIN_NO_CHANGE;
   pin_config_RX.bck_io_num = I2S_MIC_BCK;
   pin_config_RX.ws_io_num = I2S_MIC_WS;
   pin_config_RX.data_out_num = I2S_PIN_NO_CHANGE;
   pin_config_RX.data_in_num = I2S_MIC_SD;
   i2s_set_pin(I2S_PORT_0, &pin_config_RX);
   i2s_start(I2S_PORT_0);
 }
int16_t* Mic_Value()
 {
   i2s_read(I2S_PORT_0, sBuffer_RX, sizeof(sBuffer_RX), &bytesIn, portMAX_DELAY);
   for (int i = 0; i < bufferLen; i++)
   {
     sBuffer_RX[i] = sBuffer_RX[i]*2;
     if (sBuffer_RX[i] > (32767))
       sBuffer_RX[i] = (32767);
     else if (sBuffer_RX[i] < (-32768))
       sBuffer_RX[i] = (-32768);
   }
   return sBuffer_RX;
 }
void I2s_Spk_Init()
 {
   i2s_config_t i2s_config_TX{};
   i2s_config_TX.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX);
   i2s_config_TX.sample_rate = SAMPLE_RATE;
   i2s_config_TX.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT;
   i2s_config_TX.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT;
   i2s_config_TX.communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB);
   i2s_config_TX.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1;
   i2s_config_TX.dma_buf_count = 8;
   i2s_config_TX.dma_buf_len = bufferLen;
   i2s_config_TX.use_apll = false;
   i2s_driver_install(I2S_PORT_1, &i2s_config_TX, 0, NULL);
   i2s_pin_config_t pin_config_TX{};
   pin_config_TX.mck_io_num = I2S_PIN_NO_CHANGE;
   pin_config_TX.bck_io_num = I2S_SPK_BCLK;
   pin_config_TX.ws_io_num = I2S_SPK_LRCLK;
   pin_config_TX.data_out_num = I2S_SPK_DIN;
   pin_config_TX.data_in_num = I2S_PIN_NO_CHANGE;
   i2s_set_pin(I2S_PORT_1, &pin_config_TX);
   i2s_start(I2S_PORT_1);
 }
void Spk_Value(int16_t* sBuffer_RX)
 {
   for (int i = 0; i < bufferLen; i++)
   {
     sBuffer_TX[i*2] = sBuffer_RX[i];
     sBuffer_TX[i*2+1] = sBuffer_RX[i];
   }
   i2s_write(I2S_PORT_1, sBuffer_TX, sizeof(sBuffer_TX), &bytesOut, portMAX_DELAY);
 }

void setup(){
  I2s_Mic_Init();
  I2s_Spk_Init();
}

void loop(){
  Spk_Value(Mic_Value());
}

6, Miciqi Mixly Example Program (Graphical Language)

MiXdk library file (ESP32 development board-C language version):Click to download

Sample Program (ESP32 Development Board - C Language Version):Click to download

7, Test Environment Setup

Arduino ESP32 Test Environment Setup

Prepare Components:

• ESP32 Development Board *1

• ESP32 EXP1 Expansion Board *1

• USB TYPE-C DATA CABLE *1

• HS-S05C-L Omnidirectional Microphone Module*1

• HS-F33-L Audio Amplifier Module*1

• PH2.0 5P PH2.0 terminal to Dupont wire *2

Circuit wiring diagram:

8. Video tutorial

Arduino UNO video tutorial:Pending update...

ESP32 Python Video Tutorial:Pending update...

9, test result

ESP32 Test Results:

Discover the all-directional microphone module that can realize the complete audio path of 'sound collection - audio amplification - sound playback'