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This project was simple in essence. Use the Arduino development platform to test the capacity of a 1.5 V battery. Use the analog input to gauge the voltage by converting it to information the digital output of the arduino can use.

Step 1: Code

int ledpin12 = 12;

int ledpin11 = 11; int ledpin10 = 10; void setup() { Serial.begin(9600); analogRead(A0); pinMode (ledpin12, OUTPUT); pinMode (ledpin11, OUTPUT); pinMode (ledpin10, OUTPUT);

}

void loop() { float sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); if(voltage==0){ digitalWrite (ledpin12, LOW); digitalWrite (ledpin11, LOW); digitalWrite (ledpin10, LOW); } if (voltage>0){ digitalWrite (ledpin12, HIGH); } if (voltage>=.5){ digitalWrite (ledpin11, HIGH); } if ((voltage>=1)){ digitalWrite (ledpin10, HIGH); } }

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