Im attempting to control the pitch of a pulse that i generated using a pot. How do i do that

Using Arduino Programming Questions
1

Here is my code.

#define sig_output 3 // Signal Output Pin D3
int pulse_width = 0;
int pulse_width_step = 2;
int sensorValue = 0;
int sensorPin = A4;

void setup() {
  pinMode(sig_output, OUTPUT);
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}
void loop() {
  sensorValue = analogRead(sensorPin);
  analogWrite(sig_output, pulse_width);
  pulse_width = pulse_width + pulse_width_step;
  if (pulse_width == 256) {
    pulse_width = 0;
  }
  delay(4);
  Serial.println(sensorValue);
}
2

What do you by the "pitch"?

Please, post code, not pictures of code. So lazy.

3

Hello I fixed it. i apologise. First time posting here. by pitch I mean changing to different notes on a scale for example.

4

A pulse doesn't have a tone, just a duration.

Have you tried the tone () function?

Please remember to use code tags when posting code.

5

Which Arduino are you using where Pin D5 has the numerical value of 3?

D5Pin3

6

Sorry ya my bad i was trying out something its pin 3

7

So, correct the comment of the codes of post #1 and repost it using code tag (</>).

8

analogWrite produces a single frequency (pitch), but with varying duty-cycle
(ratio of on to off)

9

Facing difficulties to align the above definition of duty cycle with what I know:
duty cycle = ratio of ON to period.

Quote from net:
A compressor, for example, that operates for 1 minute and then shuts off for 99 minutes, is said to have a duty cycle of 1 / 100 , or 1 percent .

10

hi so i took your advice to use the tone function as it allows me to now control the pitch/notes of the tone. I also added another variable that is controlled by a pot to control the delay of that tone as seen below. Now im wondering if i can set certain parameters from 0 to 65000 using a loop that only allows the user to pick a specific note in a scale for example a pentatonic scale.

int outputPin = 3;
int PitchPin = A4;
int DelayPin = A3;
int Pitch = 0;
int Delay = 0;
void setup() {
  // put your setup code here, to run once:
  pinMode(outputPin, OUTPUT);
  pinMode(PitchPin, INPUT);
  pinMode(DelayPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  Pitch = analogRead(PitchPin);
  Delay = analogRead(DelayPin);
  tone(outputPin,Pitch, Delay);
  delay(Delay);

}
11

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