DESCRIPTON
Get with the times, already! This SparkFun Real Time Clock (RTC) Module is a Qwiic-enabled breakout board for the RV-1805 chipset. The RTC is ultra-low power (running at only about 22nA in its lowest power setting) so it can use a supercapacitor for backup power instead of a normal battery. This means you get plenty of charge and discharge cycles without any degradation to the battery. To make it even easier to get your readings, all communication is enacted exclusively via I2C, utilising the handy Qwiic system so no soldering is required to connect it to the rest of your system. However, there are still broken out 0.1′-spaced pins in case you prefer to use a breadboard.
This RTC module’s built in RV-1805 has not one, but two internal oscillators: a 32.768kHz tuning fork crystal and a low power RC based oscillator and can automatically switch between the two using the more precise crystal to correct the RC oscillator every few minutes. This feature allows the module to maintain a very accurate date and time with the worst case being +/- about three minutes over a year. The RV-1805 also has a built in trickle charger so as soon as the RTC is connected to power it will be fully charged in under 10 minutes and has the ability to switch power to other systems allowing it to directly turn on or off a power hungry device such as a microcontroller or RF engine.
There is also the option to add a battery to the board if the supercapacitor just isn’t going to keep your project powered long enough (keep in mind, the supercap can hypothetically make the board keep time for around 35 days), you can solder on an external battery. That means you can let the board sit with no power or connection to the outside world and the current hour/minute/second/date will be maintained.
FEATURES
- Operating Voltage (Startup): 1.6V – 3.6V
- Operating Voltage (Timekeeping): 1.5V – 3.6V
- Operating Temperature: -40C – 85C
- Time Accuracy: ±2.0 ppm
- Current Consumption: 22nA (Typ.)
- I2C Address: 0xD2
- Supercapacitor for Backup Power
- 2x Internal Oscillators
- 2x Qwiic Connectors
RESOURCES
- Schematic
- Eagle Files
- Hookup Guide
- Datasheet(RV-1805)
- Datasheet(DSK-414)
- Application Manual(RV-1805)
- Qwiic Page
- Arduino Library
- GitHub
Fast Shipping and professional packaging
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Note: Orders that contain more than one item are assigned a specific processing period depending on the specific item.
Before shipping the items, our staff will carry out an extensive inspection of the products you ordered. Today, most orders will be delivered within 48 hours. The time to deliver varies from 3-7 days.
Returns
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Our policy lasts for thirty days. If you haven't received the product within 30 days, we are unable to offer a refund or an exchange.
You can only return a product if it is unused and still in the same state as when you first received it. It should also be returned in the original packaging.
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