Real Time Clock

For the LCC project I had to add a real time clock (RTC) so that it could manage the light schedule independently of a PC. I added a fairly generic RTC shield. I could have used this one or this one. They both use the I2C bus and the DS1307 RTC chip.

The example from LadyAda didn’t allow me to manipulate the date/time components well enough so I went with a library that pulls the date/time in BCD format.  The issue was that I needed those preceding zeros on numbers less than 10. 8:8:8 is not as easy to read as 08:08:08 to me. The library I used allowed me to prepend the zero when necessary.

The library is from the Arduino Playground and also has lots of time related functions that work with any DS1307 chip.

 

 

Leave a Reply

Your email address will not be published. Required fields are marked *