Let me start by saying that I'm a noob to programming. I've only been tinkering with my Arduino for about a year.

I bought some display boards, battery holders, and a USBtinyISP. Paired with some attiny2313V-10PU's, I'm up and running on the breadboard! (This is probably more exciting to me than it should be).

Now I'm in the tweaking phase. Using the tech sheet, I was able to change the "A" font into a more classic, readable style. I also added the spinning clock hack (even though I don't know how he got those codes, lol).

Anyway, what I'd like to do now is add numbers to the font table so I can add dates to quotes; but I don't really understand how the the decimal values correspond to what's been typed in the string. I've already decoded what the decimal value should be for each digit. I tried tacking them to the end of the code, in the style of the spinning clock or the asterisk, but got an "out of range" error when I tried to compile it. Any ideas or suggestions? Or has someone already added digits to the code and would like to share? Thanks!

Now I'm in the tweaking phase. Using the tech sheet, I was able to change the "A" font into a more classic, readable style.

So it sounds like you have the basic idea of translating between the data tables and the display already.

I presume that you're using the "newer" version of the code from here:
http://www.evilmadscientist.com/source/LED_MRB2.1.zip

Anyway, what I'd like to do now is add numbers to the font table so I can add dates to quotes; but I don't really understand how the the decimal values correspond to what's been typed in the string.

What you'll probably want to do is add the ten characters to the font_table.

The way that the character decoding works is by using an ascii table-- the character 'A' corresponds to decimal 65, so we subtract 'A' from each character to find its position in the array called font_table. If the character that we want to display is an 'A', then we take 'A' - 'A' = 0, so the first element of font_table, font_table[0]. If our character is a 'C', then 'C' - 'A' - 2, so we take font_table[2] to find the next element. There are also special cases for the couple of symbols that are supported. If you add characters to the font table, you'll need to also add a case for decoding them in that section.

Regarding the out of range, that could be where you tried to retrieve an element beyond the limits of a matrix, or perhaps you ran out of memory on the device.

Quote by: Windell

I presume that you're using the "newer" version of the code from here: http://www.evilmadscientist.com/source/LED_MRB2.1.zip

Ooops, I was using an older version. Updated to 2.1 now.

Unfortunately, still getting an error. Here's what I did:

and also

Using the above, I get:

Any suggestions?

You may have exceeded the available flash space. Try reducing the number and/or length of text strings, to see if that fixes it.

Also, your digit cases are *way* too complicated. Maybe try something like this, to save *a lot* of flash space.

That streamlined digit case did the trick. I used that without removing any strings, and it worked. I had a feeling I was doing it wrong, because it was too easy.

Thanks for all of your help!