Lâmpada do Humor

Iremos construir um projeto divertido que indica o humor das pessoas através da cor da luz.

Material

• 1 Arduino Uno;
• 1 Cabo USB;
• 1 RGB LED;
• 1 Sensor de Luminosodade LDR;
• 1 Protoboard;
• Jumpers;
• 1 Papel Sulfite.

Esquema de Montagem

Montagem na Prática

Programação

//Lâmpada do Humor //www.professorakeila.com.br float RGB[3]; int ldrPin = 0; // LDR in Analog Input 0 to read the ambient light int ambientLight; // variable to store the value of the ambient light int redLed = 11; // red LED in Digital Pin 11 (PWM) int greenLed = 10; // green LED in Digital Pin 10 (PWM) int blueLed = 9; // blue LED in Digital Pin 9 (PWM) void setup(){ pinMode(redLed,OUTPUT); // tell arduino it's an output pinMode(greenLed,OUTPUT);// tell arduino it's an output pinMode(blueLed,OUTPUT); // tell arduino it's an output // set all the outputs to low digitalWrite(redLed,LOW); digitalWrite(greenLed,LOW); digitalWrite(blueLed,LOW); } void loop(){ for (float x=0;x<PI;x=x+0.00001){ RGB[0]=255*abs(sin(x*(180/PI))); // calculate the brightness for the red led RGB[1]=255*abs(sin((x+PI/3)*(180/PI))); // calculate the brightness for the green led RGB[2]=255*abs(sin((x+(2*PI)/3)*(180/PI)));// calculate the brightness for the blue led ambientLight=analogRead(ldrPin); // read an store the ambient light if(ambientLight>600){ // start only if the ambient light is very low // write the brightness on the leds analogWrite(redLed,RGB[0]); analogWrite(greenLed,RGB[1]); analogWrite(blueLed,RGB[2]); } else{ digitalWrite(redLed,LOW); digitalWrite(greenLed,LOW); digitalWrite(blueLed,LOW); } for(int i=0;i<3;i++){ if(RGB[i]<1){ delay(100); } if(RGB[i]<5){ delay(50); } if(RGB[i]<10){ delay(10); } if(RGB[i]<100){ delay(5); } } delay(1); } }