How to DIY 32 band LED Audio Music Spectrum Analyzer | Arduino based DIY project 2022

[@binhphuoc2971]

I'm not sure how it called "32-Band Spectrum Analyzer"? The most is 8. Am I missing something?

[@sc_hdz]

same thing here, did you find a way to do so?

[@ahsanraza3019]

Amazing video good informated

[@sc_hdz]

Hey! nice work, I was wondering how can I do the same thing but 8x32 ? no clue

[@ngonidzashemwanjira208]

I have connected everything appropriately but my 8x8 matrix seems to be stagnant. Please what have I done wrong?

[@SC.243k]

Very professional work, Thanks my friend, Big liked+sub 👍💙💙

[@electrodoctorofficial]

Thanks bro

[@taiyabbutt1395]

Good work bro

[@malikshahzad5617]

Nice brother

[@abidraza3909]

Nice bro

[@harveyismael8088]

Can you please create a code without 8x8 matrix driver

[@hsu6864]

hi why my project show
''compilation terminated.
exit status 1
LedControl.h: No such file or directory
''
what that mean? and how can i fix it?

[@electrodoctorofficial]

ledcontrol.h library download

[@rishijain2228]

Bro, I am not able to open the file so would you mind copy pasting the code? Thanks.

[@electrodoctorofficial]

Brother, tell me what I can do for you

[@rishijain2228]

@@electrodoctorofficial I am not able to open the google drive for the code so can you copy paste it here?

[@electrodoctorofficial]

@@rishijain2228
#include "LedControl.h"
/* Led matrix - Max7219 Declared */
LedControl lc = LedControl(12, 10, 11, 1);
const int maxScale = 11;
/* Sensor - Max9812 Declared */
const int sensorPin = A4;
const int sampleWindow = 50; // 50ms = 20Hz
unsigned int sample;
unsigned long startMillis;
unsigned long timeCycle;
unsigned int signalMax = 0;
unsigned int signalMin = 1024;
unsigned char index = 0;
unsigned int peakToPeak[8];
unsigned int displayPeak[8];
unsigned int temp[8]={0,0,0,0,0,0,0,0};
unsigned int signalMaxBuff[8];
unsigned int signalMinBuff[8];
void setup() {
// Led matrix
lc.shutdown(0, false); // bật hiện thị
lc.setIntensity(0, 1); // chỉnh độ sáng
lc.clearDisplay(0); // tắt tất cả led
Serial.begin(9600);
}
void loop() {
startMillis = millis();
//peakToPeak = 0;
signalMax = 0;
signalMin = 1024;

// Get data in 50ms
while (millis() - startMillis < sampleWindow) {
sample = analogRead(sensorPin);

if (sample < 1024) {
if (sample > signalMax) {
signalMax = sample;
}
if (sample < signalMin) {
signalMin = sample;
}
}
// 20Hz - 64Hz - 125Hz - 250Hz - 500Hz - 1kHz (timeCycle = 1/F)(ms)
timeCycle = millis() - startMillis;
if (timeCycle == 1 || timeCycle == 2 || timeCycle == 4 || timeCycle == 8
|| timeCycle == 16 || timeCycle == 32 || timeCycle == 40 || timeCycle == 50) {
signalMaxBuff[index] = signalMax;
signalMinBuff[index] = signalMin;
index = (index + 1) % 8;
delay(1);
//Serial.println(timeCycle);
}
}
// Delete pointer to array
index = 0;
// Calculation after get samples
for (int i = 0; i < 8; i++) { // i = row (led matrix)
// sound level
peakToPeak[i] = signalMaxBuff[i] - signalMinBuff[i];

// Map 1v p-p level to the max scale of the display
displayPeak[i] = map(peakToPeak[i], 0, 1023, 0, maxScale);
// Show to led matrix
displayLed(displayPeak[i], i);

// Led drop down
if (displayPeak[i] >= temp[i]) {
temp[i] = displayPeak[i];
}
else {
temp[i]--;
}

lc.setLed(0, i, temp[i], true);
delayMicroseconds(250);
}

}
void displayLed(int displayPeak, int row) {
switch (displayPeak) {
case 0 : lc.setRow(0, row, 0x80); break;
case 1 : lc.setRow(0, row, 0xC0); break;
case 2 : lc.setRow(0, row, 0xE0); break;
case 3 : lc.setRow(0, row, 0xF0); break;
case 4 : lc.setRow(0, row, 0xF8); break;
case 5 : lc.setRow(0, row, 0xFC); break;
case 6 : lc.setRow(0, row, 0xFE); break;
case 7 : lc.setRow(0, row, 0xFF); break;
}
}