Stupid AF Pet Trick: The Portrait Has Your Attention

 Hi!

for this project, in my imaginations I thought of a museum with a "mellow" light going on, where by approaching the work, one would activate some sort of spotlight and would light up the works being displayed. 

I chose to work with this color changing lamp because of 1.the  "hue" gives attention to the work. 2.It already switches colors by turning on (so it just looks pretty while I don't need to do complicating stuff).

I used a guinea pig art work as an example below to display how this gallery would operate. By approaching the art, the lamp that is controlled by an ultrasonic motion sensor will light up!

Code: 

const int TRIG_PIN = 7; // Arduino pin connected to Ultrasonic Sensor's TRIG pin

const int ECHO_PIN = 8; // Arduino pin connected to Ultrasonic Sensor's ECHO pin

const int LED_PIN  = 13; // Arduino pin connected to LED's pin

const int DISTANCE_THRESHOLD = 70; // centimeters

// variables will change:

float duration_us, distance_cm;

void setup() {

  Serial.begin (9600);       // initialize serial port

  pinMode(TRIG_PIN, OUTPUT); // set arduino pin to output mode

  pinMode(ECHO_PIN, INPUT);  // set arduino pin to input mode

  pinMode(LED_PIN, OUTPUT);  // set arduino pin to output mode

}

void loop() {

  // generate 10-microsecond pulse to TRIG pin

  digitalWrite(TRIG_PIN, HIGH);

  delayMicroseconds(10);

  digitalWrite(TRIG_PIN, LOW);

  // measure duration of pulse from ECHO pin

  duration_us = pulseIn(ECHO_PIN, HIGH);

  // calculate the distance

  distance_cm = 0.017 * duration_us;

  if(distance_cm < DISTANCE_THRESHOLD)

    digitalWrite(LED_PIN, HIGH); // turn on device

  else

    digitalWrite(LED_PIN, LOW);  // turn off device

  // print the value to Serial Monitor

  Serial.print("distance: ");

  Serial.print(distance_cm);

  Serial.println(" cm");

  delay(500);

}