Speed up frequency changing

Projects Programming
1

Hi
How to make changing frequency 10 times faster?
(10 * Sum++); is not working.

//https://create.arduino.cc/projecthub/abdullahaliali/the-eeprom-keeps-the-last-number-of-the-counter-7e6912
#include <EEPROM.h> //Call the instructions of the EEPROM library ,if I need them in this code.
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int buzzer = A5;
unsigned long AddressRom = 100; //The address of a location on the rom memory. I choose the(100).
unsigned long Sum = 0;//The variable of a sum.

void setup()//to run once.
{
  lcd.begin(16, 2);
  pinMode(buzzer, OUTPUT);
  pinMode(A3, INPUT_PULLUP);
  pinMode(A4, INPUT_PULLUP);
  EEPROM.get(AddressRom, Sum);
}

void loop()//to run repeatedly.
{
  if (digitalRead(A3) == 0) {
    (10*Sum++);
    EEPROM.put(AddressRom, Sum);
  }
  if (digitalRead(A4) == 0) {
    Sum--;
    EEPROM.put(AddressRom, Sum);
  }
  tone(buzzer, Sum);

  lcd.setCursor(0, 0);
  lcd.print("Hz ");
  lcd.setCursor(3, 0);
  lcd.print(Sum);
  lcd.print(' ');
  delay(20);
}
2

What is your understanding of that expression?

Please be aware that EEPROM has limited erase/write cycles

3

Fixed that for ya.

a7

4

is the same as

Sum = Sum + 1;

and it sounds like you want your offset to be 10, not 1 so change that part

Sum = Sum + 10;