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Recent content by pcduong

  1. P

    Dot matrix led display

    Hi Techie Have a look at https://www.mblock.com.tw/pro/16-bit.html There are low cost constant current drivers IC for LED matrix display. Regards.
  2. P

    Need 68HC908GP32 programmer

    68hc908gp32 circuit Hi, You can find a simple programmer for HC908GP32 at **broken link removed** There are schematic, layout all... I hope You find it usefull. pcduong.
  3. P

    moving pannel display LED

    Hi, Please, look at **broken link removed** There is a good implementation of a moving led display using PIC uP but the principe used here may be adapted easyly to a 8051. Regards.
  4. P

    Dot matrix led display

    Hi, For matrix led display there is a excelent drivers from MAXIM : MAX7219 or MAX7221. They use a simple SPI interface to control the led matrix and may be cascaded. OR you can use the shift register 74HC595 which contains in it self a tristate latch and may be controled using SPI protocol.
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