Skeleton Prototype V 2.0

Daniel Ward

Skeleton Night Light

This project is an ambient light that reacts to the light in the room.  When the room has light in it the skeleton is off.  As night falls, the skeleton will light up according to how dark it gets.  It is at its brightest when it is pitch dark.

 

Code:

const int sensorPin = 0;    // the pin that the sensor is attached to

const int ledPin = 9;        //the  pin that the LED is attached to

// variables:

int sensorValue = 0;         // the sensor value

int sensorMin = 0;        // the minimum sensor value

int sensorMax = 1023;           // the maximum sensor value

void setup() {

  // turn on LED to signal the start of the calibration period:

  pinMode(13, OUTPUT);

  digitalWrite(13, HIGH);

  // calibrate during the first five seconds 

  while (millis() < 5000) {

    sensorValue = analogRead(sensorPin);

    // record the maximum sensor value. 

    if (sensorValue < sensorMax) {

      sensorMax = sensorValue;

    }

    // record the minimum sensor value

    if (sensorValue > sensorMin) {

      sensorMin = sensorValue;

    }

  }

  // signal the end of the calibration period

  digitalWrite(13, LOW);

}

void loop() {

  // read the sensor:

  sensorValue = analogRead(sensorPin);

  // apply the calibration to the sensor reading

  sensorValue = map(sensorValue, sensorMin, sensorMax, 0, 255);

  // in case the sensor value is outside the range seen during calibration

  sensorValue = constrain(sensorValue, 0, 255);

  // fade the LED using the calibrated value:

  analogWrite(ledPin, sensorValue);

}