Reading 4 Analog Voltages + Displaying Them in 4 Columns in Serial Monitor

Other Hardware Sensors
1

Hi all,

I am trying to read voltages from 4 analog sensors and display them on the serial monitor in 4 columns. I would ideally like to be able to then import this data in Excel so I can compare data.

I am using the Sparkfun Arduino Pro Mini 528 in the 5V configuration.

My understanding is that I will have to use delays, since the Arduino only has one ADC onboard. Have to timeshare it, essentially. Is this correct? I found this old thread: reading multiple analog inputs - Sensors - Arduino Forum

I tried writing my own code for a 2 sensor readout, but the serial monitor displays it all in one column I think. Can someone advise on how to handle the code to get the data in this format?

Code and screenshot below

// SETUP:

void setup() {
Serial.begin(9600);                                     // initialize serial communication at 9600 bits per second:
}



// LOOP:
void loop() {

int ledPin = 3;                                         // LED connected to digital pin 3
digitalWrite(ledPin, HIGH);                             // sets the LED on


int sensorValue3 = analogRead(A3);                       // read the input on analog pin 3:
delay(10);              
float voltage3 = sensorValue3 * (5.0 / 1023.0);          // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
delay(10);              
Serial.println(voltage3);                               // print out the value you read:
delay(10);              

int sensorValue2 = analogRead(A2);                       // read the input on analog pin 3:
delay(10);              
float voltage2 = sensorValue2 * (5.0 / 1023.0);          // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
delay(10);              
Serial.println(voltage2);                               // print out the value you read:
delay(10);           

}

<img = src= "Workbench">

Note: The ultimate application goal is to determine how much noise a sampling of 4 identical commercial sensors have.

See my other thread here for more on the sensors: Can I Power 4x LEDs and 4x Phototransitors off Sparkfun's Arduino Pro Mini 528? - Project Guidance - Arduino Forum

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2

You could change

Serial.println(voltage3);

to

Serial.print(voltage3);

Then that Serial.print isn't followed by a new line.
The next print will be on the same line.

No need to use delays.
You could read the input twice, so only the second reading is used.
e.g.
int sensorValue3 = analogRead(A3);
int sensorValue3 = analogRead(A3);
float voltage3 = sensorValue3 * (5.0 / 1023.0);
Serial.print(voltage3);
Leo..