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  • 02/12/2017

    Bought to bring a RTC clock to my Raspberry PI B+. Time is synchronized by a GPS module (Neo 7N) and this RTC module can keep the time when there's no more source or when the Raspberry is rebooted. I didn't try to stop the RPI for a few days but after a 3 hours the time was still in the same second.

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  • 07/12/2017

    Tutto Ok niente da dire. Avevo già usato il DS3231 in altri progetti e si è dimostrato un RTC molto preciso e versatile. Compensazione della temperatura e memoria interna. Arriva con batteria CR2032 già installata!

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  • 24/03/2019

    Pero me inquietan dos cosas una el paquete llegó golpeado y con unas etiquetas que no se que quieren decir. Aún no tuve oportunidad de probar los productos. Adjunto fotos...

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  • 03/01/2019

    Based on the DS3231 (SN or M) chip developed by Maxim in 2004, you receive a very accurate and temperature compensated x-tal oscillator for a low price. The accuracy is 2 ppm for the (SN) x-tal based micro device and 5 ppm for the MEMS (micro electro mechanical system) based clocks. Whilst I prefer the SN version, the MEMS appliance is said to be used in the automotive industry due to its shock resistance. Which the crystal tunig forks don't "like". With the I2C interface you can chain devices in parallel and save pins compared to an SPI based solution. An EEPROM and a battery allow you to sustain time keeping over external power loss. The Adafruit library forked from Jeelab is an excellent choice for the integration in micro-controller-units (MCU) such as Atmel (defunc. now Microchip) and Espressif based ESP32 or ESP8266 working horses. Walk past any other RTC, this is the real deal. There is a reason the design of these never changed much since 15 years of its invention! For extra convenience a square wave output of 1 clock tick per second is offered (1Hz) and a 32KHz (32768Hz standard clock freq.) signal directly off the x-tal. Happy coding!

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  • 10/09/2016

    Качественная сборка. Батарейка в комплекте. На базе хорошего чипа ds3231 от"maxim". Сам чип имеет множество настроек.

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  • 09/06/2017

    The parcel arrived fairly quickly. Items were packaged carefully and arrived in excellent condition. The module itself worked well at the first try, though I haven't had it long enough to be able to say anything about how well it keeps time. But for this price, this is pretty much an unbeatable offer.

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  • 25/05/2020

    Przybyła cała, tylko pudełko, które zostało wysłane, stało się płaska podczas dostawy.

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  • 12/06/2018

    Prodotto ricevuto in tempi brevissimi con spedizione assicuarata. Il lmodulo RTC viene inviato in una busta antistatica e sigillata. è compresa anche la batteria al litio CR2032. il funzionamento e quello previsto.

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  • 15/07/2017

    Good for various projects with arduino or other applications with I2C interface. I have not tested yet. It also has the mounted battery.

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  • 12/11/2018

    Colis arrivé assez rapidement.

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