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ChronoDot - Ultra-precise Real Time Clock - v2.1

by Adafruit
An image of ChronoDot - Ultra-precise Real Time Clock - v2.1 An image of ChronoDot - Ultra-precise Real Time Clock - v2.1 An image of ChronoDot - Ultra-precise Real Time Clock - v2.1 An image of ChronoDot - Ultra-precise Real Time Clock - v2.1

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.

Click here for documentation and example code.

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 Arduino, Basic Stamp, Cubloc, and other controllers should work with no modification. This new version has a battery holder, no soldering required!

TECHNICAL DETAILS

Dimensions (without battery):

  • Length: 30.4mm/1.2in diameter
  • Height: 14.1mm/0.55in
  • Weight: 4 g
  • This board/chip uses I2C 7-bit address 0x68

netduino driver, netduino sample and Documentation! This sample exercises all the functions of the clock (same as the DS1307 driver and samples)

Also recommended is Paul Stoffergen's RTC example code (for all Arduino's and compatibles): https://github.com/PaulStoffregen/Time and http://www.pjrc.com/teensy/td_libs_DS1307RTC.html

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The ChronoDot RTC is an extremely accurate real time clock module, based on the DS3231 temperature compensated RTC (TCXO).

ADA255

This product is no longer available

It's sad to say goodbye but sometimes we have to retire products to make way for new things.

SKU
ADA255
EAN
0606034881303
Brand
Adafruit
Stock available
0 units
Backorder not allowed on this product
Weight
8g

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