Teensy 3.0 has a built-in RTC, so the DS1337 offers little benefit. However, the DS3231 includes a temperature compensated crystal, so it is recommended for applications requiring high accuracy. The ChronoDot board provides the DS3231 chip in an easy-to-use package. For use with Teensy 3.0, you must add pullup resistors for the SDA and SCL signals. Basic Usage RTC.get(); Reads the current date & t
![DS1307RTC Library, For Accessing Real Time Clock (RTC) Chips](https://cdn-ak-scissors.b.st-hatena.com/image/square/e68b1c441a18bc53a7e9e8dd94fe220bfa31672e/height=288;version=1;width=512/https%3A%2F%2Fwww.pjrc.com%2Fteensy%2Ftd_libs_DS1307RTC_2.jpg)