{"product_id":"ds3231-precision-rtc-featherwing-rtc-add-on-for-feather-boards","title":"DS3231 Precision RTC FeatherWing - RTC Add-on For Feather Boards","description":"\u003cp\u003eThis is the\u003cb\u003eDS3231 Precision RTC FeatherWing\u003c\/b\u003e: it adds an extremely accurate I2C-integrated Real Time Clock (RTC) with a Temperature Compensated Crystal Oscillator (TCXO)  to any Feather main board.\u003c\/p\u003e\n\u003cp\u003eThis RTC\u003cstrong\u003e \u003c\/strong\u003eis the most precise you can get in a small, low power package. Using our \u003ca href=\"https:\/\/shop.pimoroni.com\/products\/feather-stacking-headers-12-pin-and-16-pin-female-headers\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eFeather Stacking Headers\u003c\/a\u003e or \u003ca href=\"https:\/\/shop.pimoroni.com\/products\/feather-header-kit-12-pin-and-16-pin-female-header-set\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eFeather Female Headers\u003c\/a\u003e you can connect a FeatherWing on top of your Feather board and let the board take flight!\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/shop.pimoroni.com\/search?type=product\u0026amp;q=feather\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCheck out our range of Feather boards here.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMost RTCs use an external 32kHz timing crystal that 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 crystal is inside the chip! And right next to the integrated crystal is a temperature sensor. 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\u003eWith a CR1220 12mm coin cell plugged into the top of the FeatherWing, 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\u003e\u003cstrong\u003eA CR1220 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 you can use any CR1220 you have handy.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-ds3231-precision-rtc-breakout\/\"\u003eAdafruits tutorial for the DS3231 breakout has all the library and example code you need to get started, works with any and all of our Feathers via the Arduino IDE\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.adafruit.com\/feather\"\u003eCheck out our range of Feather boards here.\u003c\/a\u003e\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":16853881735,"sku":"ADA3028","price":13.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/3028.jpg?v=1456852885","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/ds3231-precision-rtc-featherwing-rtc-add-on-for-feather-boards","provider":"Pimoroni Ltd","version":"1.0","type":"link"}