max246:
I should give you some information about my configuration:
- The gprs shield needs 2A only sometimes, when I connect to the network, call and something else.
- The configuration with a normal power supply I can power all other items, temperature sensor, 2 servos and a camera.
What I want to confirm is that if I am going to attach the battery directly to the Arduino, does it works? I know that Arduino can handle 12 V but I don't know about 7'000mah, I think so that I understood that doesn't care if I have 1000mah o 7000mah, Arduino will take as much as it needs, right?
Correct, an arduino board will only consume about 80ma or less, not counting anything you might have wired up to the shield pins.
What about the regulator? If I buy a 12V to 5V at 3A, does it work with the battery? Does it work as I describe the Arduino that it will take max 3A ?
No, that is not required to just run the arduino board, 12vdc directly to the arduino external power connector is fine. However if you are going to also power things wired to the arduino such as servos or motors then an external regulator is often required to met the current and voltage demands of those devices. An arduino is very good at controlling external things, but does rather poorly at attempting to power external things.
Sorry to be very stupid with all these questions but I want to make sure that I understand everything
No stupid questions around here, unless you count the ones you don't know or forget to ask about.
Lefty
