> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Pimoroni RV3028 Real-Time Clock (RTC) Breakout **Type:** Product page · **SKU:** PIM449 · **Brand:** [Pimoroni](https://core-electronics.com.au/brands/pimoroni-australia) · **GTIN:** 606034879188 **Page:** https://core-electronics.com.au/pimoroni-rv3028-real-time-clock-rtc-breakout.html ([markdown](https://core-electronics.com.au/pimoroni-rv3028-real-time-clock-rtc-breakout.html.md)) An 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! ## Pricing - **Price:** $26.35 (inc GST) — $23.95 AUD, exc GST - **Quantity discounts:** 10+ $23.00 (exc GST) · 25+ $22.28 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 18 and Aug 24. ## Restrictions Restrictions apply to this equipment as it uses button/coin cell batteries: - The equipment is intended to be used in trades, professions or industries - The equipment is not intended for sale to the general public - The equipment is not intended to be used where children are present - You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above - You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries ![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png) A declaration of use will need to be submitted during checkout. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=PIM449:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/PIM449:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description An 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! The 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 Pimoroni's testing, they'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. The 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)! The RV3028 breakout has an I2C interface and is 3.3V or 5V compatible. Like our other [Pimoroni breakouts](https://core-electronics.com.au/f/pimoroni/pimoroni-breakouts.html), Pimoroni has 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). It's also compatible with the fancy [Breakout Garden](https://core-electronics.com.au/pimoroni-breakout-garden-hat-i2c-spi.html), 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. **Features** - RV3028 Real-Time Clock (RTC) - Ultra-low-power (~100nA typical current draw) - ±1 second drift per million seconds at 25 degrees - Silver oxide battery included (1.55V, 8mAh, 337 type) - 3.3V or 5V compatible - I2C interface (address 0x52) - Reverse polarity protection - Raspberry Pi-compatible pinout (pins 1, 3, 5, 7, 9) - Compatible with all 40-pin Raspberry Pi models - Compatible with Arduino - [Python library](https://github.com/pimoroni/rv3028-python) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/RV-3028-C7_85032835501.pdf) and [applications manual](https://core-electronics.com.au/attachments/localcontent/RV-3028-C7_App-Manual_30288585697.pdf) **Kit includes** - RV3028 RTC Breakout - 1x5 male header - 1x5 female right angle header **Software** Pimoroni has put together a [Python library](https://github.com/pimoroni/rv3028-python) that you can use with your RV3028 RTC Breakout, and an easy one-line installer to install everything. Their [Python library](https://github.com/pimoroni/rv3028-python) 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. **Notes** - You'll need to run the [set-time.py](https://github.com/pimoroni/rv3028-python/blob/master/examples/set-time.py) 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! - The battery in this breakout is extremely tiny, so take care not to lose it. Also take care not to contact any metal objects with the breakout to avoid shorting the battery (don't toss it in a box with other breakouts or conductive materials) - Dimensions: 19x19x4mm ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/r/v/rv3028_rtc_3_of_4_large.jpg)