LED Matrix digital logic using Logisim

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Project overview

Display arbitrary characters on a set of 8x8 square LED matrix.

In this case, four LED matrix to display "XCJ!"


Simulation with Logisim

The Logisim circuit design is available on github

  • Figured out 8-bit hexadecimal values for every row (using a spreadsheet)
  • Created a logic block simulating a LED matrix
  • Created necessary logic to refresh the same row of every LED matrix from the values stored in memory


  • Convert to 7400 series logic or VHDL schematics
  • Program parallel EEPROM with memory value
  • Implement in hardware and test


  • Expand the LED matrix
  • Create character lookup table in memory