Arduino Pro Mini Avrdude stk500_getsync() not in sync I'm new to arduino and I have a project to make a gesture sensor controller but now I'm about to test the APD9960 gesture sensor; when I program the Arduino Pro mini it keeps sending me an error  (avrdude stk500_getsync() not in sync).
This is the connection that I use. I just copied the diagram from Circuito.io:

These are my tools settings:
I just change the processor to 5V even if i have 3.3V and it works!!