First off I am still trying to learn all I can and know I by no means have a solid grasp on things. What I want to do with it is to be able to plug a 2s or 3s(one application takes a 2s the other a 3s) lipo battery into an arduino. With the battery powering it, I want to have it power 2 other boards that both need a 5v connection and also power one board that is 3v. That is all that the arduino has to do with those boards is send the proper voltage to them. I also want to add a buzzer that will beep when the lipo gets to its lowest safe level. I think this is all possible with the arduino though I am not sure about the supplying power part. Is there anyone would could take the time to tell me for the supplying power part what tutorials and things to read could you suggest so i can try and figure out how to achieve this. Would it be similar to supplying power to say a motor? Like you see in the motor tutorials? Also my other question is how does one decide what size resistors or diodes and things like that are needed for a project in general?
Thanks for any help with this