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led display module

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led display module Customers Reviews

  • Display and keyboard in one module.

    posted by bfridman

    Can be used as simple keyboard and 7-seg LED monitor.Theoretically it is possible to extend the module to 24-keys keyboard by soldering 16 other keys to existing 8 keys.
    The datasheet can be found at site http://www.titanmec.com/doce/default.htmlThe library for arduino can be found at sitehttp://code.google.com/p/tm1638-library/According to the datasheet, the IC "TM1638" supports 10 7-segments while practically 8 are used for digit monitoring and 2 reminded - for 8 red and green LEDs.The IC Supports 24 keys connected in 3x8 matrix while only one 8-key-row is used and connected to "K3" contact. Anyone who wants to use more than 8 keys can make another one or two 8-key-row(s) while separate electrodes must be soldered to separate electrodes of existing row and common electrode to "K1" and/or "K2" contact(s). (The contacts can be found beside the IC.) Also he must rewrite the standard Arduino librory or create it's own one to make it supported all 24 keys. The needed information can be found in the datasheet.
    Can be extended to 24 keys.
  • OK

    posted by sparkyrobot

    All the LED's work, except for one row. I think this was caused by my experimenting while trying to find the pin layout. The product was probably fine. Luckily I do not need all 8 rows for my project. I intend to use this for a 2 digit display.
    I received a 16pin version.By testing I found that it was connected in the following way:Rows (+): pins 6, 2, 7, 1, 12, 8, 14, 9Cols (-): pins 16, 15, 11, 5, 10, 4, 3, 13The bottom text says:pin--45.72--0.8NL23881A
    I would but one of these again if I needed it.
  • The 10 segment LED display

    posted by Unikson

    Very simple and beautiful, it does exactly just what i expected it to do, i love the way it functions it has so many functions, can be used as a battery level indicator, graphic spectrum analyzer indicator and a whole lot.
    At least the working voltage should be stated, so that one dos not end up burning the LEDs, this can help to protect the module.
    A very good module for the price, it couldn't have been better, i would order more if i have to in future.
  • 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.
  • Nice digital clock

    posted by tacalin

    Nice clock for the purpose I've purchase. I just replace my cable PVR and lost the clock on display and this little one do the job for me.No bulky case needed since the board is the same size as the display.
    The display it's a little bit too bright with 5V for a semi dark room. I'll try later today with 3V and see how is looking. The temperature looks to be accurate but since my unit it's stick on top of a media player I'm not using this feature because the display temp is few degrees higher than the room temp.
    Happy for now.

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