jeanseb:
Yes I used Eagle. It’s funny, the last time I posted Eagle file, everybody asked for Gerber files!
Depends on what you are attempting - Gerbers would be useful for PCB fab issues
(Panelizing, Routing, etc.) Schematics and Boards for electrical
design and layout issues.
I have your board and schematic open in EAGLE. No show
stoppers so far (I ran ERC and DRC to get a feel for your
design, which looks very good). I’m trying to decypher the
ground scheme, so far it looks solid.
I’m delighted to see a MAX7219 in the design (we discussed
it in several earlier threads on this forum), but your value for
Iset (R1) seems way off. I’ve been using 22 kilo ohms (10k
was too low. LEDs too bright) for a 64 LED array. How did
you arrive at “909” (Ohms, I presume)?
I’m not familiar with your choice of LDO regulators (have
to download a datasheet). There are floating pins, are all
DC voltage present and in tolerance?
Edit: My error, you have a MAX6971, not 7219…
(Another datasheet I’ll need to download soon).