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time clock

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time clock Customers Reviews

  • best real time clock board + eeprom

    posted by juanjodcv

    the pcb is very tiny, with two screw holes and two connectors. VCC GND SDA and SCL are the same in 2 conectors. you don't need to use 2 set of cables for each chip, I use one of two for chips and the other like a loop to conect an I2C lcd display.the CR2032 batt is plenty of power!
    best RTC pcb on DX!, very good quality pcb
    very good for that price
  • Good working clock with battery

    posted by josdamen

    Good quality product. Has good solid soldering. Can be used as clock and for eeprom variable storage. This all via serial interface, only 2 data wires SDA and SCL are needed.Can be directly connected to arduino uno, without extra resitors. For arduino there is special library for this clock chip ds1307. See link http://www.ladyada.net/learn/breakoutplus/ds1307rtc.html for an example.
    I'm not sure how long the battery will last. Untill now it is working fine.
    Good product. Could be cheaper if eeprom was left out. I do not need this.
  • 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
  • good for Submersible pump

    posted by DarkChewie

    Perfect for controlling irrigation system,put the device connected to a Submersible pump ...It is not necessary to improvissar switches, or putting a parallelthe device already has a button to turn off, turn on or stay on automatic.
    had no way to test whether the device actually supports devices 3000W or try to calculate its limit.when I buy a Delorean DMC 12, I can test if it can handle 1210W
    Good if you need a digital device capable of storing 10 programs on / off. this is the ideal product
  • LCD talking clock

    posted by RobbHowie

    The large characters are easy to read. Not surprisingly it keeps good time. It is reasonably easy to set the time, alarm or beeps. It is small and protable yet we leave it in the kitchen and it fits in quite nicely. It is "blind friendly" in that it can be set by a blind person.
    Worth the cost, able to be used by a person who is blind or visually impaired.

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