hi,
Ok, now i think that I can't make logic with 74154, also i can start with 2 or 4 max7219 to create a small matrix.
Next week i will get two max7219 to test my system, also i have read about sprite and matrix library who supports multiple max7219, i suppose that can i use one or two bit to select each max7219. it's correct?
for example if i have a 16x8 matrix i will use 3 bit to mapping both max7219 rows and i'll use another bit to select the chip.
rows-out: 1001, select the first rows on the second chip, or something like this no?
can you suggest me a store to buy max7219 with good price?
what's different between max7219 and max7221?
thank for your reply
Andrea