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edited Oct 10, 2016 at 14:31

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i need to read a voltage with an arduino pro mini using the analog pins.

I created this simple test code:

int sensorValue;
float voltage;
void setup() {
  Serial.begin(9600);

}

void loop() {
  sensorValue = analogRead(A0);
  voltage= sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);

}

int sensorValue;
float voltage;

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

void loop() {
  sensorValue = analogRead(A0);
  voltage= sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);
}

my setup looks like this: hardware setup

everything works so far. I get about 4,5v as a result. Now i want to port everything to an arduino pro mini. After i did that i only got 2,5v as a result. I also tried it with different pins and with an other arduino pro mini.

So what did i do wrong? Do i need an other pull-up resistor?

i need to read a voltage with an arduino pro mini using the analog pins.

I created this simple test code:

int sensorValue;
float voltage;
void setup() {
  Serial.begin(9600);

}

void loop() {
  sensorValue = analogRead(A0);
  voltage= sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);

}

my setup looks like this:

So what did i do wrong? Do i need an other pull-up resistor?

i need to read a voltage with an arduino pro mini using the analog pins.

I created this simple test code:

int sensorValue;
float voltage;

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

void loop() {
  sensorValue = analogRead(A0);
  voltage= sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);
}

my setup looks like this: hardware setup

So what did i do wrong? Do i need an other pull-up resistor?

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asked Oct 10, 2016 at 14:21

betion

arduino pro mini analog pins read different values

i need to read a voltage with an arduino pro mini using the analog pins.

I created this simple test code:

int sensorValue;
float voltage;
void setup() {
  Serial.begin(9600);

}

void loop() {
  sensorValue = analogRead(A0);
  voltage= sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);

}

my setup looks like this:

So what did i do wrong? Do i need an other pull-up resistor?

voltage-level analogread