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digit display Customers Reviews

  • Great Voltmeter!

    posted by michalwu

    Small boardVery good solder -high quality surface mounted, I was amazed really!Useful range (4.5 - 30V is more than I will ever use)No additional power source needed.Low power consumption.There is a trimpot, and you can calibrate it when needed.PCB is very small, but you have two mounting holes on edges!
    You can use it in in many many DIY projects, will fit anywhere!I am going to fix it to home emergency power supply unit.
    I recommend buying this Voltmeter.Will work as expected.
  • display

    posted by sharut

    Very fine digital display. Suitable for many DIY projects. You can built with this digital display other clock's, thermographs, tachometers, other indicators!
    good price!
    I think get it again for my next DIY projects . All the cons are not due to this device's faults, it is just the way this sort of displays operate.
  • 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.
  • 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.
  • Very useful meter

    posted by FredComp

    An excellent meter to test voltage comes from a USB connector. Also measure the current that is extracted from the USB connector. That way is to check whether the USB connector is not overloaded. The figures are clearly legible. There is no external power required. The meter every few seconds the voltage or current. Meter can be easily switched between the USB connector and the device to control.
    As far as I can control it is an precise and stable volt / ampere meter.
    This voltmeter is recommended for anyone who wants to know what is coming out of the USB connector.

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