9. LDR-sensor

LDR sensor connection diagram

Esquema de cableado del sensor LDR

Exercises

  1. Compile and upload the following program to the Arduino. Observe how the measured values ​​change as the LDR sensor is more or less illuminated.

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    //
// Sensor LDR
//
#include <Picuino.h>

// Inicia Arduino
void setup() {
   pio.begin();
   Serial.begin(19200);  // Inicializa el puerto serie
}

// Bucle principal
void loop() {
   // Lee la señal producida por el sensor LDR
   int ldr = analogRead(A1);

   // Muestra la señal por pantalla
   pio.dispWrite(ldr);
   Serial.print("LDR = ");
   Serial.println(ldr);

   // Espera medio segundo
   delay(500);
}

  2. Make a program that emits different notes depending on the light received by the LDR sensor. Replace the wait time in the previous program with the following lines of code.

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    // Theremin con sensor LDR
pio.buzzTone(500 + ldr*2);
delay(64);
pio.buzzTone(0);
delay(128);