AJ-Explains-It-All
Published © GPL3+

Arduino as a Voltmeter

Measure the juice left in your AA or AAA batteries anytime using an Arduino Uno and a couple of jumpers.

BeginnerFull instructions provided1 hour6,348
Arduino as a Voltmeter

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Code

CODE

Arduino
const float referenceVolts = 5.0; 
const int batteryPin = 0;

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

void loop()
{
int val = analogRead(batteryPin);
float volts = (val/1023) * referenceVolts;
Serial.println(volts);
}

Credits

AJ-Explains-It-All

AJ-Explains-It-All

12 projects • 10 followers
Experienced embedded firmware and software developer. I have a great affinity towards ARM cortex based MCU's.

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