// Prova dimmer 2 dissolvenze incrociate
// www.presepevirtuale.it    2013

int lampada_1 = 9; // Lampada 1 to digital pin 9
int lampada_2 = 10; // Lampada 2 to digital pin 10

void setup() { 

} 
void loop() { 
// fade in from min to max in increments of 1 points:
for(int fadeValue = 0 ; fadeValue <= 255; fadeValue +=1) { 
analogWrite(lampada_1, fadeValue); 
analogWrite(lampada_2, 255-fadeValue); 
delay(500); 
} 
// fade out from max to min in increments of 1 points:
for(int fadeValue = 255 ; fadeValue >= 0; fadeValue -=1) { 
analogWrite(lampada_1, fadeValue); 
analogWrite(lampada_2, 255-fadeValue); 
delay(500); 
} 
}