Real Time Blue Clock module DS3231SN ChronoDot V2.0 I2C Diameter
3CM
THIS IS THE LATEST VERSION 2.1
The ChronoDot RTC is an extremely accurate real time clock module,
based on the DS3231 temperature compensated RTC (TCXO). It includes
a CR1632 battery, which should last at least 8 years if the I2C
interface is only used while the device has 5V power available. No
external crystal or tuning capacitors are required.
The top side of the Chronodot now features a battery holder for
16mm 3V lithium coin cells. It pairs particularly well with CR1632
batteries.
The DS3231 has an internal crystal and a switched bank of tuning
capacitors. The temperature of the crystal is continously
monitored, and the capacitors are adjusted to maintain a stable
frequency. Other RTC solutions may drift minutes per month,
especially in extreme temperature ranges...the ChronoDot will drift
less than a minute per year. This makes the ChronoDot very well
suited for time critical applications that cannot be regularly
synchronized to an external clock.
The ChronoDot will plug into a standard solderless breadboard and
also has mounting holes for chassis installation.
The I2C interface is very straightforward and virtually identical
to the register addresses of the popular DS1337 and DS1307 RTCs,
which means that existing code for the Ard, Basic Stamp, Cubloc,
and other controllers should work with no modification. This new
version has a battery holder, no soldering required!
Photos
