SKU: 71761628988

SparkFun Real Time Clock Module - RV-1805 (Qwiic)

Sale price$1113.75 Regular price$1237.50
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Description

SparkFun Real Time Clock Module - RV-1805 (Qwiic)Get with the times, already! This SparkFun Real Time Clock (RTC) Module is a Qwiic enabled breakout board for the RV 1805 chipset. The RTC is ultra low power (running at only about 22nA in its lowest power setting) so it can use a supercapacitor for backup power instead of a normal battery. This means you get plenty of charge and discharge cycles without any degradation to the battery. To make it even easier to get your readings, all communication is

Get with the times, already! This SparkFun Real Time Clock (RTC) Module is a Qwiic-enabled breakout board for the RV-1805 chipset. The RTC is ultra-low power (running at only about 22nA in its lowest power setting) so it can use a supercapacitor for backup power instead of a normal battery. This means you get plenty of charge and discharge cycles without any degradation to the �battery.“ To make it even easier to get your readings, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system so no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1”-spaced pins in case you prefer to use a breadboard.

This RTC module’s built in RV-1805 has not one, but two internal oscillators: a 32.768kHz tuning fork crystal and a low power RC based oscillator and can automatically switch between the two using the more precise crystal to correct the RC oscillator every few minutes. This feature allows the module to maintain a very accurate date and time with the worst case being +/- about three minutes over a year. The RV-1805 also has a built in trickle charger so as soon as the RTC is connected to power the it will be fully charged in under 10 minutes and has the ability to switch power to other systems allowing it to directly turn on or off a power hungry device such as a microcontroller or RF engine.

There is also the option to add a battery to the board if the supercapacitor just isn�t going keep your project powered long enough (keep in mind, the supercap can hypothetically make the board keep time for around 35 days), you can solder on an external battery. That means you can let board sit with no power or connection to the outside world and the current hour/minute/second/date will be maintained.


The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can�t hook it up wrong.


Get Started with the RV-1805 Real Time Clock Module Guide

Features:

  • Operating Voltage (Startup): 1.6V - 3.6V
  • Operating Voltage (Timekeeping): 1.5V - 3.6V
  • Operating Temperature: -40°C - 85°C
  • Time Accuracy: ±2.0 ppm
  • Current Consumption: 22nA (Typ.)
  • I2C Address: 0xD2
  • Supercapacitor for Backup Power
  • 2x Internal Oscillators
  • 2x Qwiic Connectors

Documents:


All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
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Exchange/Return Notes
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SKU: 71761628988

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Isa Rincon
Waukegan, US
★★★★★ 2
Base part of it
Color: Black
Even though I kept this it’s very uncomfortable because of the way the base works . They are very long at the bottom and it’s hard to open and close
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Reviewed in the United States on March 15, 2026
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MARIAH DANN
Lowell, US
★★★★★ 5
Great room separator
Color: Black
The panels are much longer than we expected! We only needed 3 of the 4 proivided. It's slightly flimsy, but holds together nicely. The screwdriver that came with did not fit the screws, but luckily we had a Phillips head. It's very lightweight. It is definitely a good value for the money.
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Reviewed in the United States on February 10, 2026
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Tink
Draper, US
★★★★★ 1
Never got to try it because it was broken
Color: Black
Came with a broken piece and is taking forever to get a refund…there wasn’t an option for a replacement
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Reviewed in the United States on March 15, 2026
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Estefani T
Massapequa, US
★★★★★ 3
Room divider
Color: Black, Color: Black
It was much simpler than anticipated. I don't think it's very sturdy and it lacks weight, but it's attractive.
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Reviewed in the United States on March 20, 2026
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April Zheng
Whiting, US
★★★★★ 5
Great product
Color: Black
This is very sturdy and great quality. Its quite cheap for what your getting to it’s not cheap thin like plastic it feels thick and you could put a LITTLE weight on it it’s stable and protects your privacy.
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Reviewed in the United States on April 16, 2026

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