This is a great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for data-logging, clock-building, time stamping, timers, and alarms, etc. Equipped with PCF8523 RTC – it can run from 3.3V or 5V power & logic!
We’ve had a breakout board version of this RTC for a while, but we want to make it even easier for folks to use, so now it comes with STEMMA QT connectors for plug-and-play simplicity.
Works great with an Arduino using our RTC library, with CircuitPython, or with a Raspberry Pi (or similar single board linux computer)
- PCB & header are included
- Plugs into any breadboard, or you can use wires
- Two mounting holes
- Will keep time for 5 years or more
Note: This product does not come with a CR1220 coin cell battery. We recommend you purchase a coin cell battery to use with this product.
The PCF8523 is simple and inexpensive but not a high-precision device. It may lose or gain up to 2 seconds a day. For a high-precision, temperature compensated alternative, please check out the DS3231 precision RTC. If you need a DS1307 for compatibility reasons, check out our DS1307 RTC QT breakout
To make life easier so you can focus on your important work, we’ve 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!). We’ve 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 we have a variety in the shop. Just wire up to your favorite micro and you can use our CircuitPython/Python or Arduino drivers to easily interface with the PCF8523.
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 our detailed tutorial for pinouts, assembly, wiring & code for both Arduino and CircuitPython, and more!
Professional packing and fast shipping
Our long-standing partnership with UPS FedEx DHL and other global carriers gives us the ability to provide a range of shipping services. Our warehouse staff is highly educated and will package the items according to the exact and precise specifications. Before shipment, all items are thoroughly inspected and secured. We ship to thousands clients every day from all over the world. The fact that we are dedicated to becoming the largest online retailer in the world is clear. We have distribution centers as well as warehouses located in Europe and the USA.
Note: Orders that contain multiple items will have a different processing time for each item.
Prior to shipment, we inspect the ordered items thoroughly. The majority of orders are shipped within 48 hrs. The delivery time should be between 3-7 working days.
Returns
The stock is dynamic and we do not completely manage it because many stakeholders are involved, including our warehouse and factory. Stocks are subject to change at any time. Be aware that it is possible that your order will be out of stock after you have placed the order.
Our policy is valid for a period of 30 days. We are unable to exchange or refund your order when it's been 30 days since you purchased it.
You can only return a product in the event that it is not used and still in the same condition when you first received it. You must have the item in the original packaging.
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