controling LED via parallel port

一套单片机LED汉字显示屏软硬件系统，包括单片机程序、delphi程序、原理图和线路板图。具有红外控制，可随时更新显示内容，可以实现多种显示方式。 -A single-chip LED character display hardware and software systems, including single-chip program, delphi program, schematic and circuit board diagram. With infrared control,

connetcer control for LED bye lan or com prot.