{"product_id":"adafruit-ds3231-precision-rtc-breakout","title":"Adafruit DS3231 Precision RTC Breakout","description":"\u003cp\u003e\u003cstrong\u003eThe DS3231 Precision RTC Breakout delivers highly accurate timekeeping with built-in temperature compensation and battery backup—perfect for clocks, data logging, and projects that need reliable time even without power.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThe datasheet for the Adafruit 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 \u003cstrong\u003eReal Time Clock\u003c\/strong\u003e (RTC) is the most precise you can get in a small, low power package.\u003c\/p\u003e\n\u003cp\u003eMost RTCs use an external \u003cstrong\u003e32kHz timing crystal \u003c\/strong\u003ethat 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 \u003cstrong\u003ecrystal is inside the chip\u003c\/strong\u003e! And right next to the integrated crystal is a \u003cstrong\u003etemperature sensor\u003c\/strong\u003e. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule.\u003c\/p\u003e\n\u003cp\u003eThis is the finest RTC you can get, and now we 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 datalogging and clocks, or anything where you need to really know the time.\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\u003cstrong\u003eA coin cell is required to use the battery-backup capabilities!\u003c\/strong\u003e We 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: Coin cell  battery is not included. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/9d7kSD90Nyw?si=_fkmqifyPIqKGWgH\u0026amp;start=751\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eExtremely accurate I²C-integrated Real Time Clock (RTC)\u003c\/li\u003e\n\u003cli\u003eIntegrated crystal oscillator eliminates need for external 32kHz crystal\u003c\/li\u003e\n\u003cli\u003eBuilt-in temperature sensor compensates for frequency drift\u003c\/li\u003e\n\u003cli\u003eTemperature-compensated crystal oscillator (TCXO) technology\u003c\/li\u003e\n\u003cli\u003eLow power consumption\u003c\/li\u003e\n\u003cli\u003eCoin cell battery backup for years of operation without main power\u003c\/li\u003e\n\u003cli\u003eFully assembled and tested breakout board\u003c\/li\u003e\n\u003cli\u003eBreadboard-friendly design\u003c\/li\u003e\n\u003cli\u003eHeader pins included for breadboard use or direct wire soldering\u003c\/li\u003e\n\u003cli\u003eCompact package\u003c\/li\u003e\n\u003cli\u003eRequires CR1220 coin cell battery (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eProduct Dimensions: 23mm x 17.6mm x 7.2mm\u003c\/li\u003e\n\u003cli\u003eWeight: 2.1g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRevision History\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of January 19, 2023\u003c\/strong\u003e – we've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen - you may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDatasheets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Adafruit DS3231 Precision RTC Breakout\u003c\/li\u003e\n\u003cli\u003e1x Header Strip\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":53697504051476,"sku":"wes1787257419549","price":10.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/9486\/7220\/files\/adafruit-ds3231-precision-rtc-breakout_1.jpg?v=1787257424","url":"https:\/\/regalwearstore.shop\/products\/adafruit-ds3231-precision-rtc-breakout","provider":"My Store","version":"1.0","type":"link"}