dot screen matrix

Rami00972

New Member
i found a schematic for dot screen matrix on the web. i'm going to use the same original schematic but with mux 74138 i designed the attached picture
is there any thing seems bad ..........
 

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  • Dot_Matrix-21x5.jpg
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That will work fine except that you need the resistors in the 2003 connections. Have you considered something like the MAX7219. One of these will drive an 8*8 display with multiple displays being easily implemented.

Mike.
 
hi Mike,
My datasheet shows the ULN2003A having 2K7 resistors internal, directly TTL compatable.?

Eric
 
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