VU meter based on TLC5940 led dimmer

vu-meter.ino

#include "Tlc5940.h"

void setup() {
  Tlc.init();
}

uint32_t level = 0;

void loop() {
  int vol;
  
  int maxVol = 0;
  int minVol = 1024;
  for(int i = 0; i < 50; i++) {
    vol = analogRead(A0);
    if(vol > maxVol) {
      maxVol = vol;
    }
    if(vol < minVol) {
      minVol = vol;
    }
  }
  int vpp = maxVol - minVol;

  Tlc.clear();
  uint32_t newLevel= map(vpp, 0, 400, 0, 4095 * 8);

  if(newLevel > level) {
    level = newLevel;
  } else {
    if(level > 1000)
      level-=400;
  }

  for(int i = 0; i < int(level / 4095); i++) {
    Tlc.set(i, 4095);
  }
  
  Tlc.set(int(level/4095), level % 4095);
  Tlc.update();  
}