{"product_id":"rv3028-real-time-clock-rtc-breakout","title":"RV3028 Real-Time Clock (RTC) Breakout","description":"\u003cp\u003eAn ultra-low-power ( ~100 nA), highly accurate real-time clock breakout. The RV3028 RTC breakout is perfect for adding timekeeping to your project and, thanks to the tiny on-board battery, it'll keep time when your device is powered off. Like all the best timepieces, it's Swiss-made!\u003c\/p\u003e\n\u003cp\u003eThe RV3028 RTC is factory-calibrated, and is quoted to drift by just ±1 second per million seconds at 25 degrees. This will vary slightly depending on a number of factors. In our testing, we've seen performance better than ±2 seconds per million seconds. For comparison, that's up to five times more accurate than your average digital watch.\u003c\/p\u003e\n\u003cp\u003eThe tiny silver oxide battery (8mAh, included) keeps the RTC running when your device (Raspberry Pi or Arduino) is powered off and can sync the time when powered back on. It should last for several years (up to nine in theory, although the battery shelf-life is five years)!\u003c\/p\u003e\n\u003cp\u003eThe RV3028 breakout has an I2C interface and is 3.3V or 5V compatible. Like our other \u003ca href=\"\/en-eu\/collections\/pimoroni-breakouts\" target=\"_blank\"\u003ePimoroni breakouts\u003c\/a\u003e, we've designed it so that you can solder a piece of right-angle header onto it and then pop it straight onto the bottom left 5 pins on your Raspberry Pi's GPIO header (pins 1, 3, 5, 6, 9).\u003c\/p\u003e\n\u003cp\u003eIt's also compatible with our fancy \u003ca href=\"\/en-eu\/products\/breakout-garden-hat-i2c-spi\" target=\"_blank\"\u003eBreakout Garden\u003c\/a\u003e, where using breakouts is as easy as just popping it into one of the six slots and starting to grow your project, create, and code.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRV3028 Real-Time Clock (RTC)\u003c\/li\u003e\n\u003cli\u003eUltra-low-power (~100nA typical current draw)\u003c\/li\u003e\n\u003cli\u003e±1 second drift per million seconds at 25 degrees\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSilver oxide battery included (1.55V, 8mAh, 337 type)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e3.3V or 5V compatible\u003c\/li\u003e\n\u003cli\u003eI2C interface (address 0x52)\u003c\/li\u003e\n\u003cli\u003eReverse polarity protection\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi-compatible pinout (pins 1, 3, 5, 7, 9)\u003c\/li\u003e\n\u003cli\u003eCompatible with Arduino\u003c\/li\u003e\n\u003cli\u003eCompatible with all 40-pin Raspberry Pi models (\u003ca href=\"https:\/\/github.com\/pimoroni\/rv3028-python\" target=\"_blank\"\u003ePython library\u003c\/a\u003e)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible with Raspberry Pi Pico (\u003ca href=\"https:\/\/github.com\/pimoroni\/pimoroni-pico\" target=\"_blank\"\u003eC++\/MicroPython libraries\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.microcrystal.com\/fileadmin\/Media\/Products\/RTC\/Datasheet\/RV-3028-C7.pdf\" target=\"_blank\"\u003eDatasheet\u003c\/a\u003e and \u003ca href=\"https:\/\/www.microcrystal.com\/fileadmin\/Media\/Products\/RTC\/App.Manual\/RV-3028-C7_App-Manual.pdf\" target=\"_blank\"\u003eapplications manual\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/PIM449-schematic.png?v=1738862773\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRV3028 RTC Breakout\u003c\/li\u003e\n\u003cli\u003e1x5 pin header\u003c\/li\u003e\n\u003cli\u003e1x5 right angle socket header\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSoftware\u003c\/h2\u003e\n\u003cp\u003eWe've put together a \u003ca href=\"https:\/\/github.com\/pimoroni\/rv3028-python\" target=\"_blank\"\u003ePython library\u003c\/a\u003e that you can use with your RV3028 RTC Breakout, and an easy one-line installer to install everything.\u003c\/p\u003e\n\u003cp\u003eOur \u003ca href=\"https:\/\/github.com\/pimoroni\/rv3028-python\" target=\"_blank\"\u003ePython library\u003c\/a\u003e allows you to set and get the time (year, month, day, hour, minute, second), set periodic countdown timers with interrupts, and to set one-off or recurring alarms with interrupts.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYou can also use this breakout with Raspberry Pi Pico and other RP2040 boards, using \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/pimoroni\/pimoroni-pico\/\" target=\"_blank\"\u003eC++ or Pirate brand MicroPython\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003cstrong\u003e\u003c\/strong\u003eNotes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eYou'll need to run the \u003ca href=\"https:\/\/github.com\/pimoroni\/rv3028-python\/blob\/master\/examples\/set-time.py\" target=\"_blank\"\u003eset-time.py\u003c\/a\u003e example the first time that you use your RV3028 RTC breakout to set the time correctly and to enable the clock to run on battery backup!\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eThe battery in this breakout is extremely tiny, so \u003cstrong\u003etake care not to lose it\u003c\/strong\u003e. Also \u003cstrong\u003etake care not to contact any metal objects with the breakout\u003c\/strong\u003e to avoid shorting the battery (don't toss it in a box with other breakouts or conductive materials)\u003c\/li\u003e\n\u003cli\u003eDimensions: 19x19x4mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pimoroni","offers":[{"title":"Default Title","offer_id":27926940549203,"sku":"PIM449","price":12.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/RV3028_RTC_3_of_4.JPG?v=1560180301","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/rv3028-real-time-clock-rtc-breakout","provider":"Pimoroni Ltd","version":"1.0","type":"link"}