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time module Customers Reviews

  • best of arduino

    posted by HUGUENOTTE

    // This code tests the DS1307 Real Time clock on the Arduino board.// The ds1307 works in binary coded decimal or BCD. You can look up// bcd in google if you aren't familior with it. There can output// a square wave, but I don't expose that in this code. See the// ds1307 for it's full capabilities.// DS1307 I2C RTC DS1307 24C32 Real Time Clock Module for Arduino (Works with Official Arduino Boards)
    photo :http://tonyhuguenotte.free.fr/DS1307.jpghttp://www.emartee.com/product/42059/Tiny%%2020RTC%%2020DS1307%%2020Shield%%2020V2.0
    bon produit je n'ai pas encore tester le 24c32 pour bientôt
  • Time counter

    posted by kaijuu

    Nice, big and bright LED-display. Counts seconds, minutes or hours (choice is made through a jumper on the back). You can choose whether the unit zeroes itself or not with another jumper.
    The connection is as follows: short V and A; the count begins. If you don't set it to auto zero, the value will stay on display until you short D and GND or if you power it down and up again.Datasheet can be found by Googleing for um5140tu-a1
    Nice module and if you want to keep track of how long something's been up while it has power, this is a unit to go for. Does not retain its data after power down.
  • Execellent!!! DS3231 is a good alternative for DS1307

    posted by fpaletta

    -Time accurancy, high precision-Out-of-the-box compatible with DS1307 library-eprom memory (exactly like DS1307)
    DYI community is aware that the DS1307 modules are showing delays/advances in ramdom. It seems that the cristal is not calibrated after the module has been pu together. So, if you are finding accurancy problems with DS1307, this is the perfect replacement. DS3231 is excelent. It is out-of-the-box compatible with DS1307 libraries so you have just to plug-and-play. Your projects will never again delay/advance time in random. This module is very pricise. I have a testing project which checks NTP time from Internet and compares with time from this module. Over a week now less than 2ms difference has been noticed.
    DS3231 is an excelent model replacement for DS1307
  • Very good Time/Date/Data keeping IC

    posted by bfridman

    Has Back-Up battery which lets you disconnect the device from power supply without time loosing.Also it can recharge battery (By default the battery-recharging-function is neutralized and can be activated by special command).In addition DS1302 has RAM memory for any data so you do not need special Flash Memory to remember the settings in case of power loss.
    The recharging-battery-function is by default neutralized to prevent damaging non rechargeable batteries. To activate this function you must give special command, but if you want do it, you must choose right kind of rechargeable battery according to datasheet.Also provide the good contacts while connect the IC to circuit/controller to ensure the correct data reading.
    Datasheet can be downloaded from:http://datasheets.maximintegrated.com/en/ds/DS1302.pdfThe library can be downloaded from:http://www.henningkarlsen.com/electronics/library.php?id=5
  • A clock for Arduino os RaspberryPI

    posted by 0xFBi

    The board is very simple but with some good choices: the battery is not soldered but in a battery socket and the chip is on a socket too.The working chip is well documented in the productor site.The PCB is good, fiberglass based and with 4 holes to fix the board in any way.
    Arduino board without a time keeper lacks an important thing, without time you can't do domotic application or small automation project.The DS1302 is a well known chip and here http://www.henningkarlsen.com/electronics/library.php?id=5 you can find a good library to easily use with Arduino.
    Essential for every board without an internal clock.

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