I need to implement a lunar cycle to my led Light for my tank.
Hi have four bank of led, 2 blues and 2 whites, and some led Smd 5050 to simulate moon phase.
The cat 4101 are driving the 2 blues and whites, and a tip 120 is driving the 5050's.
I am working with Arduino uno REV 3.
in the future i want to add a wheter sketch aswell, but i am newbie, and for now moon phase is enough.
I have this symple sketch taht i like, cause is very simple, and update leds by seconds.
#define DS1307_ADDRESS 0x68 // This is the address
const int Blue1Pin = 10;
const int Blue2Pin = 5;
const int White3Pin = 3;
const int White4Pin = 11;
const unsigned long HOUR = 60 * 60;
const unsigned long MINUTE = 60;
const int TARGET_BRIGHTNESS = (255 * 4 / 5); // Target brightness is 3/4 of full
LiquidCrystal lcd(12, 13, 4, 6, 7, 8);
/***** RTC Functions *******/
// Convert normal decimal numbers to binary coded decimal
byte decToBcd(byte val)
return ( (val/10*16) + (val%10) );
// 1) Sets the date and time on the ds1307
// 2) Starts the clock
// 3) Sets hour mode to 24 hour clock
// Assumes you're passing in valid numbers.
void setDateDs1307(byte second, // 0-59
byte minute, // 0-59
byte hour, // 1-23
byte dayOfWeek, // 1-7
byte dayOfMonth, // 1-28/29/30/31
byte month, // 1-12
byte year) // 0-99
// Gets the date and time from the ds1307
void getDateDs1307(byte *second,
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
// Change these values to what you want to set your clock to.
// You probably only want to set your clock once and then remove
// the setDateDs1307 call.
second = 55;
minute = 03;
hour = 14;
dayOfWeek = 4; // Sunday is 0
dayOfMonth = 4;
month = 8;
year = 11;
setDateDs1307(second, minute, hour, dayOfWeek, dayOfMonth, month, year);
// Convert binary coded decimal to normal decimal numbers
byte bcdToDec(byte val)
return ( (val/16*10) + (val%16) );
///// Get time from RTC into RTCHour, RTCMinute, RTCSecond
// Gets the date and time from the ds1307
// Set the register pointer to 0 (Second)
// Read Second, Minute, and Hour
int RTCSecond = bcdToDec(Wire.read());
int RTCMinute = bcdToDec(Wire.read());
int RTCHour = bcdToDec(Wire.read() & 0b111111); //24 hour time
unsigned long time = RTCHour * HOUR + RTCMinute * MINUTE + RTCSecond; // Time in seconds
analogWrite(Blue1Pin, brightness(time, 14*HOUR, 14*HOUR+7*MINUTE));
analogWrite(Blue2Pin, brightness(time, 14*HOUR+1*MINUTE, 14*HOUR+6*MINUTE));
analogWrite(White3Pin, brightness(time, 14*HOUR+2*MINUTE, 14*HOUR+4*MINUTE));
analogWrite(White4Pin, brightness(time, 14*HOUR+3*MINUTE, 14*HOUR+5*MINUTE));
byte brightness(unsigned long time, unsigned long fadeUpStart, unsigned long fadeDownStart)
// Mid day, light is at maximum brightness
if (time >= fadeUpStart + 1*MINUTE && time <= fadeDownStart)
// Dawn: fade up the light
if (time >= fadeUpStart && time <= fadeUpStart + 1*MINUTE) //FADE UP
unsigned long seconds = time - fadeUpStart; // Number of seconds into the fade time
return TARGET_BRIGHTNESS * seconds / (MINUTE*1); // Fade up based on portion of interval completed.
// Evening: Fade down the light
if (time >= fadeDownStart && time <= <= fadeDownStart + 1*MINUTE) // Fading down
unsigned long seconds = (fadeDownStart + (MINUTE*1)) - time; // Number of seconds remaining in the fade time
return TARGET_BRIGHTNESS * seconds / (MINUTE*1); // Fade down based on portion of interval left.
// The remaining times are night and the lights is off
return 0; // Shouldn't get here
of course the period part it's just for test for now...
Now i would like to get Moon Phase Like:
int moon = 5;
int iBlueIntensity; //declare the integer of blue intensity
float fBlueIntensity; //declare the floating point version of blue intensity
// RTC variables
byte second, rtcMins, oldMins, rtcHrs, oldHrs, dayOfWeek, dayOfMonth, month, year, psecond;
float fSecond, fHour, fMinute; //turn the times read from the RTC into float for math ops
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year; //declare variables to hold the times
getDateDs1307(&second, &rtcMins, &rtcHrs, &dayOfWeek, &dayOfMonth, &month, &year);
fSecond = (float) second; //sets fSecond as the float version of the integer second from the RTC
fMinute = (float) minute; //same as above, but for the minute
fHour = (float) hour; //ditto, but for the hour
int lunarCycle = moonPhase(year, month, dayOfMonth); //get a value for the lunar cycle
if ( ((hour == 14) && (minute < 7)) || (hour < 14))//Off at 730am.
fBlueIntensity = 0; //...then we want the blue LED at the max brightness (255)
else if (hour > 14) //&& (hour < 19)) // On at 5pm
fBlueIntensity = 255 * (((fHour - 17) + (fMinute / 59)) / 7); //...set intensity out of 255 based on time since 17:00
fBlueIntensity = 0;
//---------account for the moon cycle with the blue LEDs---------//
if (lunarCycle == 0) //new moon
fBlueIntensity /= 2;
if ((lunarCycle == 1) || (lunarCycle == 7)) //cresent
fBlueIntensity /= 1.75 ;
if ((lunarCycle == 2) || (lunarCycle == 6)) //half moon
fBlueIntensity /= 1.5;
if ((lunarCycle == 3) || (lunarCycle == 5)) //gibbous
fBlueIntensity /= 1.25;
//full moon is full intensity
//----------FLOAT TO INT-------------//
iBlueIntensity = (int) fBlueIntensity;
//---prepare the intensities to be written to pin----//
if (iBlueIntensity < 0) //if the blue intensity is less then 0, set it to 0
iBlueIntensity = 0;
The answer is how can I tie together the two pieces of code?
thanks to all those who can help me