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thanks alot buddies spscially mixos
it was really useful links , but this displays use only the ROM memory to display a stored messages , i need if possible an interface with a standard keyboard or a keypad(matrix of switches)
Do yourself a favour and buy Z8 encore kit for US$49 (check www.zilog.com for details or just go to www.mouser.com and
It comes with 5 character LED matrix and enough memory.
It also includes C compiler with examples, book, power supply,