In SX Microcontrollers, SX/B Compiler and SX-Key Tool, johncouture wrote:

Attached is the program.  It works ok.  Just putting it here for others to use.  
 

Basically all the program does is count up from zero to 9999 and display the number on a four inch LED panel.  

 

Each segment of the panel is 4 or five LEDs in series so you can't just drive it from an MCU, you have to use transistors or a driver chip.  In this case I used several transistors (schematic attached).

 

Pictures of Prof Dev Board and Panel

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