LEDで蛍光灯を作る 3

Arduinoのスケッチはこちら。
(Gistを使って表示しています。Bloggerを動的ビューにして見ている方には見えないかも。)

	/*
	LED fluorescent-light simulation.
	Low speed PWM(50Hz and 50-90 percent duration) flickers each light.
	Each switch-on time delays randomly.
	Sometime it turns off and on like an error.
	output:d0-d3
	random seed:a2
	also detects mains off.
	Wire mains to a0 input through an resistor and a0 to ground through another resistor
	in order to fit the input voltage within 0-5v.
	(for example,I use dc12v as mains,so I choose 15k and 4.7k resistor to get almost 3v.)
	*/
	int outPins[4] = {0,1,2,3};
	byte lightState[4] = {0,0,0,0};
	const unsigned long OFFSET[4] ={0,5,10,15};
	const unsigned long PERIOD = 20; // T[ms}=1000[ms]/50[Hz]
	const unsigned long DUR = 80;
	const unsigned long DELAY_MAX = 1000;
	const long BAD_DENOM_BOOT = 4; // denominator of failure probability on booting
	const long BAD_DENOM_RUN = 40000; // denominator of failure probability on running
	const byte anaPin = 2;
	long mainsTh;
	void setup() {
	randomSeed(analogRead(anaPin));
	mainsTh = analogRead(anaPin) * 9 / 10;
	for(int i=0; i<4; i++){
	pinMode(outPins[i],OUTPUT);
	}
	startSeq(outPins,lightState,OFFSET,PERIOD,DUR,DELAY_MAX,mainsTh,anaPin);
	}
	void loop() {
	isMainsOff(mainsTh,anaPin,outPins,OFFSET,PERIOD,DUR);
	for(int i = 0; i < 4; i++){
	pwmWrite(outPins[i],lightState[i],OFFSET[i],PERIOD,DUR);
	}
	if(random(BAD_DENOM_RUN) == 0){
	turnIt(2,0,outPins,lightState,OFFSET,PERIOD,DUR,DUR/4,DELAY_MAX*4,mainsTh,anaPin);
	turnIt(2,1,outPins,lightState,OFFSET,PERIOD,DUR,DUR,DELAY_MAX/2,mainsTh,anaPin);
	}
	if(random(BAD_DENOM_RUN/2) == 0){
	turnIt(3,0,outPins,lightState,OFFSET,PERIOD,DUR,DUR/4,DELAY_MAX*5,mainsTh,anaPin);
	turnIt(3,1,outPins,lightState,OFFSET,PERIOD,DUR,DUR,DELAY_MAX/2,mainsTh,anaPin);
	}
	delay(1);
	}
	void startSeq(int outPins[],byte lightState[],const unsigned long offSet[],unsigned long period,unsigned long dur,unsigned long delayMax,long mainsTh,byte anaPin){
	shuffle(outPins,4);
	turnIt(0,1,outPins,lightState,offSet,period,dur,dur,delayMax/2,mainsTh,anaPin);
	for(int i=1;i < 4; i++){
	turnIt(i,1,outPins,lightState,offSet,period,dur,dur,delayMax/(4-i),mainsTh,anaPin);
	}
	if(random(BAD_DENOM_BOOT) == 0){
	turnIt(2,0,outPins,lightState,offSet,period,dur,dur/4,delayMax*2,mainsTh,anaPin);
	turnIt(2,1,outPins,lightState,offSet,period,DUR,dur,delayMax/2,mainsTh,anaPin);
	}
	if(random(BAD_DENOM_BOOT/2) == 0){
	turnIt(3,0,outPins,lightState,offSet,period,dur,dur/4,delayMax*3,mainsTh,anaPin);
	turnIt(3,1,outPins,lightState,offSet,period,dur,dur,delayMax,mainsTh,anaPin);
	}
	}
	void turnIt(int i,byte flag,int outPins[],byte lightState[],const unsigned long offSet[],unsigned long period,unsigned long dur,unsigned long durIt,unsigned long delayMax,long mainsTh,byte anaPin){
	unsigned long delayTime = (unsigned long) random(delayMax);
	unsigned long startTime = millis();
	while(lightState[i] != flag){
	if(millis() - startTime > delayTime){
	lightState[i] = flag;
	}
	isMainsOff(mainsTh,anaPin,outPins,offSet,period,dur);
	for(int j = 0; j < 4; j++){
	if(i == j){
	pwmWrite(outPins[j],lightState[j],offSet[j],period,durIt);
	}else{
	pwmWrite(outPins[j],lightState[j],offSet[j],period,dur);
	}
	}
	delay(1);
	}
	}
	byte isMainsOff(long mainsTh,byte anaPin,int outPins[],const unsigned long offSet[],unsigned long period,unsigned long dur){
	if(mainsTh <= analogRead(anaPin)){
	return 0;
	}
	while(mainsTh > analogRead(anaPin)){
	for(int j=0;j<4;j++){
	pwmWrite(outPins[j],0,offSet[j],period,dur);
	}
	delay(1);
	}
	return 1;
	}
	void shuffle(int ary[],int arySize){
	for(int i=0;i< arySize-1; i++) {
	int j = random(i,arySize);
	int t = ary[i];
	ary[i] = ary[j];
	ary[j] = t;
	}
	}
	void pwmWrite(int pin,byte state,unsigned long offSet,unsigned long period,unsigned long dur){
	if(state == 0){
	digitalWrite(pin,LOW);
	return;
	}
	if ((((millis() + offSet) % period) * 100) < (period * dur)){
	digitalWrite(pin,HIGH);
	return;
	}else{
	digitalWrite(pin,LOW);
	return;
	}
	}

view raw LED_fluoro_sim_tiny85.ino hosted with ❤ by GitHub