Editorial Solution

Let’s do the hardware connection. We need a potentiometer to vary input-signal voltage. We can use any potentiometer with value from 1K to 10K ohms.

Connection

Firmware

Arduino IDE has a serial plotter tool, we can open it by clicking below

To plot data on the serial plotter, we need to simply send data to the Serial monitor with a new line (Serial.println()), where the new line separates the values.

Let’s code.

Code

void setup() {
  Serial.begin(9600);
}

void loop() {
  // Read the analog values from A0
  int analogValueA0 = analogRead(A0);

  // For the Serial Plotter, just print the values without any text
  Serial.println(analogValueA0);
  delay(100);  // Add a short delay to control the update rate
}

Code explanation

analogRead(analogPin): reads ADC value.
Serial.println: print ADC_value on Serial monitor.

Output

The circuit is easy. Shown below

The output of increasing value is as above

Output video

As we can see in the video, the Serialplotter plots values w.r.t. a change in the potentiometer.

The serial plotter is one of the very useful features provided by Arduino IDE. It is very easy to understand any data visually, rather than a list of numbers.

The multiple values can also be plotted simultaneously, using the “\t” tab. If we send 2 values with a tab separating them, both values will be plotted on the Serial plotter simultaneously.

Limitations

There is no option for vertical and horizontal scrolling so it limits viewing waveform over time range.

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