Adafruit DS3231 Precision RTC - STEMMA QT

SKU: ADA5188 Brand: Adafruit

The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, hey, it does exactly what it says on the tin! This Real Time Clock (RTC) is the most precise you can get in a small, low-power package.

$29.60 AUD, inc GST

$26.91 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Fastest delivery: Tomorrow* Disclaimer:
For next-day delivery, the shipping address must be in the AusPost next-day network, eParcel Express must be selected, and the order must be placed before 2PM AEST Mon-Thurs excluding NSW Public Holidays. Orders may be delayed due to AusPost pickup timings and order verifications. eParcel Express is typically a 1-day service within the AusPost next-day network, though it is sometimes 2+ days.

Quantity Discounts:

10+ $25.84 (exc GST)
25+ $25.03 (exc GST)

Restrictions apply to this equipment as it uses button/coin cell batteries:

The equipment is intended to be used in trades, professions or industries
The equipment is not intended for sale to the general public
The equipment is not intended to be used where children are present
You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
You are aware that these restrictions are due to a change in A ustralian legislation in 2022 for button/coin cell batteries

Button Battery Warning

A declaration of use will need to be submitted during checkout.

Adafruit have had a breakout board version of this RTC for a while, but Adafruit want to make it even easier for folks to use, so now it comes with STEMMA QT connectors for plug-

Most RTCs use an external 32kHz timing crystal that is used to keep time with low current draw. And that's all well and good, but those crystals have slight drift, particularly when the temperature changes (the temperature changes the oscillation frequency very very very slightly but it does add up!) This RTC is in a beefy package because the crystal is inside the chip! And right next to the integrated crystal is a temperature sensor. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule.

This is the finest RTC you can get, and now Adafruit have it in a compact, breadboard-friendly breakout. With a coin cell plugged into the back, you can get years of precision timekeeping, even when main power is lost. Great for data-logging and clocks, or anything where you need to really know the time. A coin cell is required to use the battery-backup capabilities! Adafruit don't include one by default, to make shipping easier for those abroad, but we do stock them so pick one up or use any CR1220 you have handy.

To make life easier so you can focus on your important work, Adafruit have taken the sensor and put it onto a breakout PCB along with support circuitry to let you use it with 3.3V (Feather/Raspberry Pi) or 5V (Arduino/ Metro328) logic levels. Additionally, since it speaks I2C you can easily connect it up with two wires (plus power and ground!). Adafruit have even included SparkFun qwiic compatible STEMMA QT connectors for the I2C bus so you don't even need to solder! QT Cable is not included, but Adafruit have a variety in the shop. Just wire up to your favorite micro and you can use Adafruit's CircuitPython/Python or Arduino drivers to easily interface with the DS3231.

Comes as a fully assembled and tested breakout plus a small piece of header. You can solder header in to plug it into a breadboard, or solder wires directly.

Check out Adafruit's detailed tutorial for pinouts, assembly, wiring & code for both Arduino and CircuitPython, and more!

Specifications

Product Dimensions: 25.4mm x 17.8mm x 7.8mm / 1.0" x 0.7" x 0.3"
Product Weight: 2.5g / 0.1oz
Datasheet, schematics, EagleCAD PCB files, and Fritzing available in the product tutorial

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Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

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