Published January 18, 2018 © GPL3+

blink an eye

the darker it gets, the faster this robot blinks with his eyes, until he freaks and doesn't blink at all anymore, until you hold his hand.

BeginnerProtip2,969

Things used in this project

Hardware components

pressure sensor

light sensor (LDR)

Resistor 10k ohm

Resistor 221 ohm

LED (generic)

Software apps and online services

Arduino IDE

Story

If it gets darker, the lights are blinking faster and faster. When it's completely dark, the lights stop blinking and stay on. If you gently press the pressure sensor, the lights will go off again.

I made this for my robot Jerry. Jerry is afraid in the dark. The lights will become his eyes and will make it look like he's blinking. The pressure sensor will end up in his hand, so if you hold his hand, he'll calm down and close his eyes.

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Robot Jerry

Code

code blinking an eye

// Pins

//int ledPin = 9;
//int brightness = A5;
//int pressure = A0;

// Variables 
int valBrightness = 0;
int valPressure = 0;
int valLed = 0;

void setup() {      
  Serial.begin(9600);
  pinMode(9, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(A0, INPUT);
  pinMode(A5, INPUT);
}

void loop() {
  
  valBrightness = analogRead(A5);       
  valPressure = analogRead(A0); 
  
    if (valBrightness > 850) { 
      (valLed = 25);          
    if ((valBrightness < 850) and (valBrightness > 750)) {
      (valLed = 60);
    }
    if ((valBrightness < 750) and (valBrightness > 450)) {
      (valLed = 90);
    }
    if ((valBrightness < 450) and (valBrightness > 420)) {
      (valLed = 125);
    }
    if (valBrightness < 420){
      (valLed = 0);
      if (valPressure > 100){
      (valLed = 200);
      }
    }
    if (valLed == 25) {
     digitalWrite (9, HIGH);
     digitalWrite (6, HIGH);
     delay (1000);
     digitalWrite (9, LOW);
     digitalWrite (6, LOW);
     delay (1000);
    }
    if (valLed == 60) {
     digitalWrite (9, HIGH);
     digitalWrite (6, HIGH);
     delay (600);
     digitalWrite (9, LOW);
     digitalWrite (6, LOW);
     delay (600);
    }
    if (valLed == 90) {
     digitalWrite (9, HIGH);
     digitalWrite (6, HIGH);
     delay (300);
     digitalWrite (9, LOW);
     digitalWrite (6, LOW);
     delay (300);
    }
    if (valLed == 125) {
     digitalWrite (9, HIGH);
     digitalWrite (6, HIGH);
     delay (200);
     digitalWrite (9, LOW);
     digitalWrite (6, LOW);
     delay (200);
    }
    if (valLed == 0) {
      digitalWrite (9, HIGH);
      digitalWrite (6, HIGH);
    }
    if (valLed == 200) {
      digitalWrite (9, LOW);
      digitalWrite (6, LOW);
    }
    
  Serial.println(valBrightness);
  Serial.print (valPressure);
  Serial.print (valLed);
  
}