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  • 19/05/2019

    well made, fully functional and sent with a CR2032 battery, there is a problem. A CR2032 CAN'T BE charged and there is a overheating risk and explosion risk. Using a LIR2032 isn't a better way because the charging circuit is always on. So disable the charging circuit by desoldering the diode or the resistor as I did (picture 1). If you want to to test the voltage battery, add a pin to the + battery (picture 2) and don't directely connect the battery to a microcontroller !. Used with a Arduino Nano and when i had cutted the power supply to test the DS3231, I noticed that the Arduino was powered by the battery powered and discharged it. After I added a TL071, as unity gain buffer (picture 3) with offset adjustment between the battery and the the Arduino, all worked well (picture 4 and 5).

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  • 09/12/2017

    The quality of the products seem good. The modules come even with battery and that’s good.

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  • 21/04/2015

    Works good, soldering is a bit %$!"§. Comes with LIR2032. Works on Arduino with this Library: https://github.com/JChristensen/DS3232RTC

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  • 11/10/2018

    The battery is CR2032 so that it is written in "Specification". However, the charge circuit is valid without being changed. I recommend that we take an article of "arduino forum*" into account or change the battery to LIR2032. *:https://forum.arduino.cc/index.php?topic=278270.0

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  • 10/07/2017

    works as expected, tested with Arduino Nano and RtcLib: https://github.com/adafruit/RTClib.git

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  • 13/04/2019

    Warning! This module has built in charging circuit for battery LIRC2032. But this module include non rechargeable battery CR2032. It can be very dangerous to use this module at 5V VCC. It can be OK after desolderig diode or corresponding resistor 200R.

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  • 25/09/2018

    Faster delivery. good quality product. working good

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  • 08/10/2016

    Módulo de reloj con bus I2C perfecto para montajes con Arduino. Lo más complicado es ponerlo en hora, pero se puede hacer siguiendo estos pasos: • Abrir Excel y programar estas fórmulas: [B6]=AHORA() [B7]= (B6 - 25569) * 86400 • El resultado de la derecha es la hora UNIX que usa el programa “TimeRTCSet.pde” (Ejemplos de la librería Time.h) • Cargar el programa TimeRTCSet.pde y abrir el terminal serie • Compilar y lanzar el programa TimeRTCSet.pde. • El programa se para esperando la hora desde el terminal serie, escribir T • Ir a Excel y pulsar F9, copiar el contenido de la celda de la derecha y pegarlo en la línea superior del terminal de Arduino. Añadir unos cuantos segundos para compensar la diferencia de hora desde que se pulsó F9 y hasta que se cargue el programa en el Arduino. • Pulsar Enviar en terminal serie. • Comprobar que la hora mostrada por el Arduino en el terminal serie se corresponde aproximadamente con la hora actual. Además la batería que trae es recargable y se carga cuando el reloj está alimentado externamente, por lo que no hay que preocuparse de cambiarla cada año.

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  • 24/05/2016

    Fast shipping and im ready to explore...

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  • 24/07/2016

    Connected this to a PicAXE X20, Initialize: hI2Csetup I2Cmaster, %11010000, I2Cslow, I2Cbyte Set the time and date with: hI2Cout $0 , ( $00, $36, $14 ,$7, $23, $07 , $16) ' Set the clock to 14:36:00, Sat, 07/23/16 ; (secs,mins,hours,day,date,month,year) ' Enter in BCD -- hours example ( $0 to $23 ) Read the time and date: hI2Cin $0 , (secs,mins,hours,day,date,month,year) secs = bcdtobin secs mins = bcdtobin mins hours = bcdtobin hours day = bcdtobin day date = bcdtobin date month = bcdtobin month year = bcdtobin year

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