I have a quick question about current draw from the raspberry pi with input peripherals/hardware through GPIO pins;
So thumbing through the basic documentation, I found this bit of information:
The maximum permitted current draw from the 3.3 V pins is 50 mA.
Maximum permitted current draw from the 5 V pin is the USB input current (usually 1 A) minus any current draw from the rest of the board.
Model A: 1000 mA - 500 mA -> max current draw: 500 mA
Model B: 1000 mA - 700 mA -> max current draw: 300 mA
Be very careful with the 5 V pins P1-02 and P1-04, because if you short 5 V to any other P1 pin you may permanently damage your RasPi. Before probing P1, it's a good idea to strip short pieces of insulation off a wire and push them over the 5 V pins so you don't accidentally short them with a probe.
so, this leads me to my question; I have a 300mA rated fan motor through the 5v, a usb dongle rated at 100mA along with a webcam via USB thats drawing 700mA. If I use a larger power supply (current one is rated at 3.1 Amps), will this be enough current for the Pi? does the Pi only draw a max current of an Amp?