seven segment LED

Discussion in 'The Projects Forum' started by Lin, Jul 26, 2006.

  1. Lin

    Thread Starter New Member

    Jul 26, 2006
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    Hi

    Does anyone have the schematic diagram of the connections/wiring to make a simple seven segment LED (how to connect each segment to what)

    my project requires me to make a numerical display(1-9)
    i have to input a number to the computer and the number has to appear on the numerical display

    pls help

    thanks
     
  2. Gadget

    Distinguished Member

    Jan 10, 2006
    613
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    The pinouts vary. You need the data for the type that you are using.

    The simplest way to make one work would be to latch and buffer the output from your parallel port and either drive the segments directly, or via a BCD to 7 segment display chip like the CD4511. A simple program in Qbasic or Visual basic should handle the software side.
     
  3. Lin

    Thread Starter New Member

    Jul 26, 2006
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  4. Dave

    Retired Moderator

    Nov 17, 2003
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  5. Lin

    Thread Starter New Member

    Jul 26, 2006
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  6. Gadget

    Distinguished Member

    Jan 10, 2006
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    Yup, there are MANY different types, styles and manufacturers of 7 Segment LED displays, and they dont all use the same lead connections.
    You must first identify whether your circuit will use Common Anode, or Common Cathode types, and then choose the type that best suits your needs (Red, Green, high bright, large size etc etc). The type you chose should either come with pinout data, or the data should be readily available.
     
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