Hi! i want to make a standalone setup, and since the project is not computationally intensive i want to keep the pcb small and simple.1)If i set the atmega to work with the internal clock, can i still power it with 5V? or i need to give it 3.3V? i have a pir and other stuff on the board that is 5V so if i have to use two voltages on 8mhz it no longer makes sense.
2)not directly related to my project, if run the atmega at 8mhz how are pwm/timer(s) library affected? does delay and similar functions work as advertised? someone says that the internal 8mhz clock is not stable, what kind of applications can have trouble with it?Thanks!