My circuitry now seems good but still can't get communication with the mcu. Either, whenever I can check the input to the transistor schematics you suggested before arrives with the correct timing, I cannot directly check the 10- 5v pulses because i don't own the equipment to do it. Just tryed 10v - 0v removing the 5v pullup and seems good. (tryed to use the 5v level as ground but the power supply became crazy because it provide both 12v and 5v.). Any other idea?
Just a question. I need an explanation about times in the following table.
For example, 78704/fx, with an fx of 5Mhz, how long it is? 15ms or i'm wrong?
Thanks