Im a very beginner with electronics and started with Arduino. So I tried to make a little device which is a separate board which is being work based on digital out and few output port from Arduino. But rather than separate board system , I would like to make Arduino and my custom board together. Is that possible or from where I could get the good circuit for Arduino nano with its all mandatory components including the bootloader.
Important point is the device Im trying to build is something which is intended to run 365x24x7 (No worries about power failure, its running on perfect backup system)
Also another concern is I dont need all the IO pins I just need 3-4 pins from Arduino. So is that requires any serious changes on the Arduino circuitry. Sorry because of my poor knowledge in electronics Im sharing that stupid question.
Please share your kind thoughts.