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[Reply #90 on:]

but the use milis, why did i get a RTC then?

"millis" tells you the time that has elapsed since the last reset.
An RTC should retain the time even if the processor is reset or powered-off.
"millis" and "micros" also give you the time in smaller increments than most RTCs.

[Reply #91 on:]

I Know HazardsMind it was aimed at AWOL
You been helping a lot thank you

[Reply #92 on:]

it was aimed at AWOL

OK, bye.

[Reply #93 on:]

AWOL i am a pc Tech and the obvious things for me is not so obvious for the public i work with, sometimes i cant understand why they don't understand things that is second nature to me. So i know why you getting fed up with me asking so much, i don't understand the obvious to you, hence the questions.
I felt today like the ppl that come to me for advice, there is no excuse for my behavior.
I am sorry for shouting at you

[Reply #94 on:]

For ppl that is interested in te code to control a pin with a RTC here is the code. The pin(in this case will be high for the ten secs the if statement is true. After ten secs the pin will go low

Code:

#include <Wire.h>
#include "RTClib.h"

RTC_DS1307 RTC;
int ledPin = 8;

void setup()   
{
  Serial.begin(9600); 
  Wire.begin();       
  RTC.begin();       

 
  RTC.adjust(DateTime(__DATE__, __TIME__));
  pinMode (ledPin, OUTPUT);
}

void loop()   
{
  DateTime now = RTC.now(); 
  Serial.print(" Time = ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();
  delay(3000);
  if (now.hour() == 20 && now.minute() == 56 && now.second() < 10)
      digitalWrite(ledPin, HIGH);   
  else {
    digitalWrite(ledPin, LOW);
 }
}

[Reply #95 on:]

You still need to take out "delay(3000);" , its not needed. Also now.second() < 10, is not for ANY 10 seconds, but for when the clock changes from say (example) 5 minutes to 6 minutes. The LED is only ON for the first 10 seconds, of the NEW minute. Actually it would be 7 seconds, since you have that 3 second delay still in there.

Just pointing that out.

[Reply #96 on:]

Tx HazardsMind
My objective with this was so that when i get my motor shield i will adapt the code to activate a dc motor at say 8am in and run it for ten seconds, then it will stop. Thant will be the time it takes from a closed blind to open them.

[Reply #97 on:]

Ok, if it works,it works.