Seven segment LED display unit

 1.Outline
　(1) This unit is controlled with onechip microcontorller PIC16C84.
      So, circuit is very simple but functions is very high level.
       (See the Page of Device about onechip CPU PIC16C84)
　(2) Features and functions
　　・Control dynamically 5 digits segment LED
       (internally 6 digits and output lower 5 digits)
　　・Suppress leading zero
　　・Always receive Data from serial port during display
　　　　（Speed of serial port is about 10kbps)

 2.Circuit diagram

                 ----------           --------      
     LED        |          |         |        |       
     control    | PIC16C84 | 7SEG    | LED    |    ---------------------
     unit       | LED cont |-------->| DRIVER |-->| 5 DIGIT SEGMENT LEDs|
                |          | 5digit  | (Tr)   |   |                     |
                |          |         |        |   |                     |
                 ----------           --------     ---------------------
                     |(serial interface)
                 Input data

 3.Circuit Diagram and PCB ArtWork
   The Circuit and ArtWork are edited with CAD HiWIRE II, then download
   and braws by HiWIRE II.

      Circuit (Brows by HiWIRE)
      Artwork (Brows by HiWIRE)

 4.Program Source List
   The format of this program is suited to MPASM that is standard assembler
   of PIC series one chip microcomputer.
   
     Program list(Compressed by LHA)

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