kstopa / arduino-battery-checker

A simple Arduino project to check voltage status of a battery

Simple Arduino battery voltage checker

A simple Arduino project to check voltage status of a battery between 0 and 10V including standard AA,AAA types and LiPo.

Sketch

The connection is pretty simple, check it out on the sketch bellow. To check your battery you just need to connect your own where the AAA is setup.

Code

int analogPin = A0; // potentiometer wiper (middle terminal) connected 
                    // to analog pin 3 outside leads to ground and +5V
int val = 0;        // variable to store the value read
float vbat = 0.0;

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

void loop() {
  val = analogRead(analogPin);  // Read analog value from input pin (0 to 1023)
  vbat = float(val);
  vbat = 10.0*vbat/1024.0;      // Convert to voltage note that vcc (5V) is divided by 2
  Serial.println(vbat);
  delay(1000);
}

More information

For more information you can check the projects listed bellow:

• A simple project and nice description about measuring voltage with Arduino.
• A more complex project that includes a LCD viewer.