Arduino Theramin

/**************************************************************************
 *            Arduino Theramin                                            *
 *            learnelectronics                                            *
 *            10 JAN 2023                                                 *
 *            https://www.youtube.com/learnelectronics                    *
 *            Adapted and modified from an original                       *
 *            sketch by Øyvind Nydal Dahl                                 *
 *            see original sketch here:                                   *
 *            https://www.build-electronic-circuits.com/arduino-theremin/ *
 **************************************************************************/








int analogPin = A0; // Input from photoresistor connected to A0
int buzzerPin = 4; // Positive buzzer pin connected to pin 4

long max_frequency = 2000; // Max frequency for the buzzer

long frequency; // The frequency to buzz the buzzer
int readVal; // The input voltage read from photoresistor


void setup() {
    pinMode(buzzerPin, OUTPUT); // set a pin for buzzer output

}

void loop() {
    readVal = analogRead(analogPin); // Reads 0-1023
    frequency = (readVal * max_frequency) / 1023;
    tone(buzzerPin, frequency);

}