20180123 arduino condensatore breadboard01

I propose a new measurement experiment using Arduino, working as DAQ (data acquisition instrument). I proceed as described in the articles Arduino and Excel with PLX-DAQ and Voltage divider measurements with PLX-DAQ: I mount my circuit on breadboard powered by the Arduino board at 5V. I propose to analyze the charge and discharge of a capacitor and collect data in a Excel spreadsheet.
In this lab test, I use the following devices: 1 capacitor 3300µF (electrolytic), 1 resistor 1kΩ,1 switch, 5V Arduino supply.

I write the Arduino sketch reported below.

#define sensorPin A0 // select the input pin for the potentiometer
int sensorValue = 0; // variable to store the value coming from the sensor 0-1023
float sensorVoltage = 0; // variable to store the voltage coming from the sensor 0-5V
int cont = 0;

void setup() {
  Serial.begin(9600);
  Serial.println("CLEARDATA");
  Serial.println("LABEL,t,COUNTER,V-CONDENSATORE");
}

void loop() {
  // read the value from the sensor
  sensorValue = analogRead(sensorPin);
  // calculate voltage
  sensorVoltage = sensorValue*5.0/1023.0;
  // send value to USB
  Serial.print("DATA,TIME,");
  Serial.print(cont++);
  Serial.print(",");
  Serial.println(sensorVoltage);
  // delay 100ms
  delay(100);
}

The figure below shows a measurement test with data collection in Excel and a 2-Dline type graph to represent voltage measured on capacitor.

20180123 arduino condensatore breadboard02

 


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