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void setup() {
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
}
int i = 127;
int j = 127;
int globalLimit = 255;
int ldr = 0;
int itercnt = 0;
boolean powerDown = false;
boolean powerUp = false;
void loop() {
itercnt++;
ldr = analogRead(A0);
if (ldr >= 1000 && globalLimit == 255) {
powerDown = true;
powerUp = false;
} else if (ldr < 1000 && globalLimit == 0) {
powerDown = false;
powerUp = true;
}
if (powerDown && globalLimit > 0) {
// slow shutdown
itercnt % 8 == 0 && globalLimit--;
} else if( powerUp && globalLimit < 255 ) {
// fast start
globalLimit++;
}
delay(50);
i = limit(i + (random(2) == 0 ? 8 : -8), 16);
j = limit(j + (random(2) == 0 ? 2 : -2), 2);
if (ldr > 600) {
analogWrite(3, j);
analogWrite(5, i);
} else { // Simply go dark
analogWrite(3, 0);
analogWrite(5, 0);
}
}
int limit(int i, int within) {
if (globalLimit < within)
return 0;
if (i > (globalLimit - within))
return globalLimit - within;
if (i < within)
return within;
return i;
}
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