{"product_id":"adafruit-pcf8523-real-time-clock-breakout-board-stemma-qt-qwiic","title":"Adafruit PCF8523 Real Time Clock (RTC) Breakout Board","description":"\u003cp\u003eThis 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 \u0026amp; logic!\u003c\/p\u003e\n\u003cp\u003eAdafruit have had a breakout board version of this RTC for a while, but they want to make it even easier for folks to use, so now it comes with STEMMA QT connectors for plug-and-play simplicity.\u003c\/p\u003e\n\u003cp\u003eWorks great with an \u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-pcf8523-real-time-clock\/rtc-with-arduino\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino using the RTC library\u003c\/a\u003e, with \u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-pcf8523-real-time-clock\/rtc-with-circuitpython\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCircuitPython\u003c\/a\u003e, or with a \u003ca href=\"https:\/\/learn.adafruit.com\/adding-a-real-time-clock-to-raspberry-pi\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRaspberry Pi (or similar single board linux computer)\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePCB \u0026amp; header are included\u003c\/li\u003e\n\u003cli\u003ePlugs into any breadboard, or you can use wires\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes\u003c\/li\u003e\n\u003cli\u003eWill keep time for 5 years or more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote: This product does not come with a CR1220 coin cell battery.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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, \u003ca href=\"\/en-eu\/products\/adafruit-ds3231-precision-rtc-breakout\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eplease check out the DS3231 precision RTC\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eTo 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!). They've even included \u003ca href=\"\/en-eu\/collections\/qwiic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSparkFun qwiic\u003c\/a\u003e compatible \u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT\u003c\/a\u003e connectors for the I2C bus so \u003cstrong\u003eyou don't even need to solder!\u003c\/strong\u003e QT Cable is not included, \u003ca href=\"\/en-eu\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ebut we have a variety in the shop\u003c\/a\u003e. Just wire up to your favorite micro and you can use the CircuitPython\/Python or \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_DPS310\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino drivers\u003c\/a\u003e to easily interface with the PCF8523.\u003c\/p\u003e\n\u003cp\u003eComes 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.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-ds3231-precision-rtc-breakout\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCheck out this detailed tutorial for pinouts, assembly, wiring \u0026amp; code for both Arduino and CircuitPython, and more!\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL DETAILS\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-pcf8523-real-time-clock\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCheck out this detailed guide for code, libraries, schematics, Fritzing object and more!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThis board\/chip uses I2C 7-bit address 0x68\u003c\/p\u003e\n\u003cp\u003eProduct Dimensions: 25.4mm x 17.8mm x 7.8mm \/ 1.0\" x 0.7\" x 0.3\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.5g \/ 0.1oz\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":39421340680275,"sku":"ADA5189","price":5.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5189-00.jpg?v=1628502182","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-pcf8523-real-time-clock-breakout-board-stemma-qt-qwiic","provider":"Pimoroni Ltd","version":"1.0","type":"link"}