Binary Clock

Forum 2005-2010 (read only) General Exhibition
12

The code I posted above uses a 24 hour clock. To convert that to a 12 hour clock you can use the following function:

byte hours24To12(byte hours){
  if( hours == 0 )
    return 12; // 12 midnight
  else if( hours  > 12)
    return hours - 12 ;
  else
    return hours ;
}

Determining AM/PM is easier, if the 24 hour value is < 12 its AM , otherwise its PM