Atmega328p circuit is built and tested.. and it works fine.
BUT, i noted that all digital pins output only 3.7V instead of 5V,
while analog pins output 5V as normal !
i tried to remove extra parts to test and figure out the problem, but still the same
now i only got the Atmega, Oscillator and a pullup resistor to the reset pin, and i got no advantage ..
tried to redo the code, i even tried a very simple code: