IoT 아두이노 0616 - V/R + LED8

#include <LiquidCrystal.h>
int pin_LED[8] = {22,24,26,28,30,32,34,36};
int pin_VR = A1;
int pin_LCD_DATA[8] = {A8,A9,A10,A11,A12,A13,A14,A15};
int pin_LCD_CTRL[3] = {A5,A6,A7};
LiquidCrystal lcd(A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15);


void setup() {
  pinMode(pin_VR, INPUT);
  lcd.begin(16,2);
  lcd.print("ADC Data :");
  lcd.setCursor(0, 1);
  lcd.print("Volt :      [V]");
  for(int i=0; i<8; i++)
  {
    pinMode(pin_LED[i],OUTPUT);
    digitalWrite(pin_LED[i], LOW);
  }
}

void loop() {
  uint16_t da = analogRead(pin_VR);
  float voltage = (float)da * 5 /1023;
  int led_mv = (da+110)/80;
  int mv_num = 1;
  lcd.setCursor(11, 0);
  if(da<1000){lcd.print(" ");}
  if(da<100){lcd.print(" ");}
  if(da<10){lcd.print(" ");}
  lcd.print(da);
  lcd.setCursor(8, 1);
  lcd.print(voltage);
  for(int i=0; i<led_mv; i++){
    mv_num = mv_num*2;
    int temp = mv_num - 1;
    LED_control(temp);
  }
  delay(500);
}
void LED_control(uint8_t da)
{
  for(int i=0; i<8; i++)
  {
    digitalWrite(pin_LED[i], (da >> i) & 0x1);
  }
}