Straight Key Morse Code Oscillator

1/*
2 This circuit is for a Straight Key Code Practice Oscillator. 
3   
4  Straight Key (using pushbutton in place of a straight key in this Sketch)
5
6   Sends tone to speaker connected to digital pin 8,
7  when pressing the Straight   Key (pushbutton) attached to pin 2.
8
9  The circuit:
10  - Speaker - from   pin 8 through potentiometer to speaker to ground 
11  - Straight Key (pushbutton)   attached to pin 2 from +5V
12  - 10K resistor attached to pin 2 from ground
13
14   created 2018
15  by Jon Garber AC8XU
16
17  This example code is in the public   domain.
18
19 */
20
21// constants won't change. They're used here to set pin   numbers:
22const int buttonPin = 2;     // the number of the pushbutton pin
23int   audio8 = 8;      // output audio on pin 8
24int note = 800;      // music note/pitch
25
26//   variables will change:
27int buttonState = 0;         // variable for reading the   pushbutton status
28
29void setup() {
30  // initialize the pushbutton pin as   an input:
31  pinMode(buttonPin, INPUT);
32
33}
34
35void loop() {
36  //   read the state of the pushbutton value:
37  buttonState = digitalRead(buttonPin);
38
39   // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
40   if (buttonState == HIGH) {
41    // turn Speaker on:
42    tone(audio8, note);
43   } else {
44    // turn Speaker off:
45    noTone(audio8);
46  }
47}
48

1/*
2 This circuit is for a Straight Key Code Practice Oscillator. 
3  
4  Straight Key (using pushbutton in place of a straight key in this Sketch)
5
6  Sends tone to speaker connected to digital pin 8,
7  when pressing the Straight  Key (pushbutton) attached to pin 2.
8
9  The circuit:
10  - Speaker - from  pin 8 through potentiometer to speaker to ground 
11  - Straight Key (pushbutton)  attached to pin 2 from +5V
12  - 10K resistor attached to pin 2 from ground
13
14  created 2018
15  by Jon Garber AC8XU
16
17  This example code is in the public  domain.
18
19 */
20
21// constants won't change. They're used here to set pin  numbers:
22const int buttonPin = 2;     // the number of the pushbutton pin
23int  audio8 = 8;      // output audio on pin 8
24int note = 800;      // music note/pitch
25
26//  variables will change:
27int buttonState = 0;         // variable for reading the  pushbutton status
28
29void setup() {
30  // initialize the pushbutton pin as  an input:
31  pinMode(buttonPin, INPUT);
32
33}
34
35void loop() {
36  //  read the state of the pushbutton value:
37  buttonState = digitalRead(buttonPin);
38
39  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
40  if (buttonState == HIGH) {
41    // turn Speaker on:
42    tone(audio8, note);
43  } else {
44    // turn Speaker off:
45    noTone(audio8);
46  }
47}
48