thank you Bill for your answer,
bperrybap:
Not much difference between #5 and #6.
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the numbers 1, 2, 3, 4, 6 and 9 arn't the same .. a little difference .. but not the same
bperrybap:
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I kind of like the font used in hd44780 LCDs when used on lines.
They use 5x7 (the upper 7 rows/pixels) and use the bottom row for underline or a cursor.
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no much difference between 5x7 and 5x8, I think it gives more length to the numbers and it's more beautiful ... no ?
bperrybap:
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However, you haven't said how you are physically arranging the modules.
So, one thing to consider is the over all display and the spacing between the LED matrix displays.
Depending on spacing, it can create issues or benefits.
For example, when there is no space between matrix modules, the pixels of the characters can run together and make things harder to read depending on the font.However, if the 8x8 matrix modules are butted up with no spaces, you can take advantage of using fewer than 8 pixels across to get more characters across than you have 8x8 modules.
i.e. if you have six 8x8 modules that gives you 48 pixels, at 5 pixels per character plus 1 inter character gap you can get 8 characters.8x8 fonts can look ok if you get a nice cp437 font.
The cp437 font is nice because it can be used for some primitive graphics as well.I'm not sure how you are implementing the h/w but I'd start with one of the larger matrix displays available on ebay. Like a 32x8, 32x16, 24x16, 64x16, etc... display. Some are red/green which gives you three colors per pixel.
They typically interface using SPI so here is no complicated wiring and many use chipsets that have arduino libraries for controlling them.--- bill
Here is an overview of the project I plan to do :