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display 4 digit Customers Reviews

  • 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.
  • Usefull gadget

    posted by iggie

    This digital meter is great to determine the output voltage and current that is being supplied to your device. Seems accurate and dependable.
    I am curious to know how much power it consumes but is probably minimal. Nice size to keep in with other tools or USB adapters.
    If you need or want to know the output voltage and current supplied to your USB devices get this meter.This digital meter is great to determine the output voltage and current that is being supplied to your device. Seems accurate and dependable.
  • simple USB consumption measuring

    posted by mkobylan

    looks like standard USB flash memory so you should not have problem to push it into any USB port0.1A 0.01V measurement resolution
    producer should think of next generation with different display module
    it's too long so device you are connecting is bending/pulling USB port down - I would rather buy something smaller (I don't need digits 9mm high)
  • Cool electronic clock

    posted by madmax1981

    It is a cool electronic clock, it look's very nice on the desk. It came packed in bubble foil. It has temperature sensor and it can display the temperature wich is very usefull. It has 4 display modes: only clock, only date, only temperature and alternate. The temperature is not very accurate, but if you have a accurate termometer you can correct the error because the module has that function. Also has the correction function for the clock too.
    This is a cool clock with bright led's.
  • Nice 4 digit display.

    posted by DrJFM

    Only takes 2 wires to use. Mine was a Catalex as shown. Had seen some complaints about these devices from various sources, but no problems with this one.Used: http://www.seeedstudio.com/wiki/Grove_-_4-Digit_Display for trial sketchs and nice timer routine too.
    Surprised how accurate a clock you get with just the UNO crystal and no correction. Wanted to do something each day at a time +/- a couple of min.If I have to adjust the "clock" once a week, no big deal.
    Ordered a couple more! Will try w ATTiny.

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