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led module red

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led module red Customers Reviews

  • Red and blue light, perfect for plants growing

    posted by mingos3

    Works great.A lot of lightLow consumptionRed and blue light wich is the best color spectrum to assimilate chlorophyllVery lightweyght
    The item has 4 screw holes and 2 holes more, I suppose that the 2 extra holes are to connect the cablesThe back side is coated with copper
    Bright light but so much concentrated at a given point. Useful color light: blue and red color (460 nm and 680 nm ) have the appropiate wave lenght to be absorbed for the plants
  • Works great and easy to use and mount into panel

    posted by KFandroid

    Easy to mount into panels. Great size. The diffuser on the screen makes the characters a bit dimmed down, and not as bright. Perfect to use in boats or other places because it does not affect your night vision. Intelligent software adjusts the decimal point like: 9.99 to 10.0 volts.
    This voltmeter works prefectly in my boats cockpit to monitor my batterys. Works to what it is ment for.
    Easy to connect to battery etc. It is not much bigger than two AA batteries. Easy to read characters.
  • Good for Arduino beginers

    posted by Nick17200

    I bought this kit for experimenting with my students.Works on SPI and is very easy to order with an Arduino Uno.The PCB Board is marked and that makes the components to be easy mounted.The device works from the first try if it's built properly.
    Perhaps it would be useful to make a PCB Led array, and the headers have the mother out of the PCB, to be able to interconnect with other PCB
    It can be used to commercials light !
  • a good product.

    posted by JakoMeister

    it is the cheapest Mini 8 x 8 Red LED Display i have found. Other products similar like this costs at least 10 dollars. It is easy to use with your DIY projects with arduino or raspberry pi (or another). It works fine. A good product with a great price.
    So you need a lot of wires to plug all the pins, i suggest you, to use a controller like the mcp23017 or something similar like this (with a only mcp23017 you can use both Mini 8 x 8 Red LED Display at the same time).
    none.
  • 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.

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