hi Oleg,
u said, "As about practice I can suggest you: give us the name (vendor, model, etc) of LED Dot Matrixes you use there. Then we can talk about schematic."

i have been hoping to hear from u about the schematic. can we start now?

i am constructing the matrix myself using 5mm LEDs with max current of 20mA.

i am anxious for your reply.

Regards,
Ehigie