Help on transistors or MOSFET in 8x8x8 LED cube

Discussion in 'The Projects Forum' started by yash02, Apr 10, 2015.

  1. yash02

    Thread Starter New Member

    Nov 19, 2014
    12
    0
    I am on a project to build a 8x8x8 LED cube having common cathodes in each layer. I have built the cube and now I have to build the main circuit. I am using my Arduino Mega 2560 to control it.

    I have a big problem in selecting transistors for the layer of the cube. I saw in which she used two 2N2222 in parallel to get the desired output. Can anybody help me how is that done.

    How can I connect two 2N2222 in parallel to get double the current rating? Or can anybody suggest another MOSFET which can be used in my project.

    Please provide the pin diagram so that I can understand clearly because I am working for the first time with transistors and MOSFETs.

    Actually I have 64 anodes and 8 cathodes . I am driving 64 anodes using shift registers and i needed the help on 8 cathodes section.
     
  2. frpr666

    Active Member

    Feb 2, 2010
    37
    6
    would you post you schematic please? I think if the 2N2222 is able to drive Imax is 800mA then it means 800/64=12.5mA each diode. If you need more power I would recommend you irlr024n which is cheap and easy to get.
     
  3. yash02

    Thread Starter New Member

    Nov 19, 2014
    12
    0
    each layer need 20mA * 64 = 1.28A which is approximately double of 800mA that a 2N2222 can provide so I thought of connecting them in parallel
     
  4. frpr666

    Active Member

    Feb 2, 2010
    37
    6
    irlr024n and a 330R resistor connected to the gate will work.
     
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