{"product_id":"adafruit-pcf8523-real-time-clock-assembled-breakout-board","title":"Adafruit PCF8523 Real Time Clock (RTC) Assembled 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.\u003c\/p\u003e\n\u003cp\u003ePerfect for datalogging, 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\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 this 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. We recommend you purchase a coin cell battery to use with this product.\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, please check out the \u003ca href=\"\/en-eu\/products\/adafruit-ds3231-precision-rtc-breakout\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDS3231 precision RTC\u003c\/a\u003e.\u003c\/p\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\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\u003e\u003cstrong\u003eRevision History:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of March 25, 2022\u003c\/strong\u003e, this board now may come with a PCB version that has HVSON or SOIC-8 chip package depending on what chip is available in the market. Both are identical functionality!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of Aug 30, 2017\u003c\/strong\u003e we have updated the design to have an RC filter on the power supply to reduce accidental resetting if power drops too fast!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eMounting holes are 2.2mm (0.086in) diameter, 25mm (0.98in) apart\u003c\/li\u003e\n\u003cli\u003eThis board\/chip uses I2C 7-bit address 0x68\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.5mm x 21.7mm x 4.8mm \/ 1.0\" x 0.9\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.2g \/ 0.0oz\u003c\/p\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adding-a-real-time-clock-to-raspberry-pi\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eAdding a Real Time Clock to Raspberry Pi\u003c\/a\u003e - Keep time at all times with a real time clock\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/i2c-addresses\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eI2C addresses!\u003c\/a\u003e - I2C addresses from 0x00 to 0x7F (inclusive)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-pcf8523-real-time-clock\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eAdafruit PCF8523 Real Time Clock\u003c\/a\u003e - Tick tock, got a clock?\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/macropad-2fa-totp-authentication-friend\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMacroPad 2FA TOTP Authentication Friend\u003c\/a\u003e - Easy keeb access to your TOTP keys.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":39850360242259,"sku":"ADA3295","price":6.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/3295-03.jpg?v=1649415050","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-pcf8523-real-time-clock-assembled-breakout-board","provider":"Pimoroni Ltd","version":"1.0","type":"link"}