1. I have a arduino nano board & made a small project on it. Its running succesfully.
2. Now i want to go to program 100 more MCU and make own board which is customized and has MCU on it?
3. How can i program MCU alone on my customized board. I dont need any FTDI ic or usb port on my board.
4. Also I dont need external crystal? How I can do change in arduino programming so that Atmega uses its internal oscillator only.