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31  Using Arduino / General Electronics / Re: Powering ATMEGA 2560 on: October 03, 2012, 02:27:47 pm

You want to know the MIN current it has to provide. It says in the link I provided: 40mA per I/O pin (max). There are 86 I/O pins (from what I understand). That is 3440mA, + 500mA that the 3.3V pin can provide, that is 3940mA -> ~4A, so your power supply must provide AT LEAST 4A. I think you should go for 5A so you are on the safe side.

Edited because I forgot the 16 analog inputs pins in my calculation, and I'm not even sure I'm right but you get the idea smiley. Please note that I'm nowhere near a specialist, I'm beginner like you!

If you would pull 4A from the AVR you would kill it. If you take a closer look at the datasheet it says:

Quote from: datasheet
ATmega640/1280/2560:
1)The sum of all IOH, for ports J0-J7, G2, A0-A7 should not exceed 200mA.
2)The sum of all IOH, for ports C0-C7, G0-G1, D0-D7, L0-L7 should not exceed 200mA.
3)The sum of all IOH, for ports G3-G4, B0-B7, H0-H7 should not exceed 200mA.
4)The sum of all IOH, for ports E0-E7, G5 should not exceed 100mA.
5)The sum of all IOH, for ports F0-F7, K0-K7 should not exceed 100mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current
greater than the listed test condition.
32  General Category / General Discussion / Re: Arduino Due (released Oct 22, 2012) Compatibility on: October 02, 2012, 01:50:21 pm
How does the due ARM processor compare to AVR32 UC3 (as seen in http://www.aery32.com/) speedwize? Is the ARM actually a lot faster?
33  Using Arduino / Audio / Re: Arduino due - 32 bits ? on: September 29, 2012, 03:22:26 am
Hmmm looks good.
I was kinda hoping to use the Due more so because it was faster.  Using the ARM processor.

Oh , so it will be using arm. Now that sounds just lovely smiley
34  Using Arduino / General Electronics / Re: Powering ATMEGA 2560 on: September 28, 2012, 06:26:31 am
LM317 is an adjustable regulator right? I'd use a 7805 for the sake of simplicity.
35  Using Arduino / Audio / Re: Arduino due - 32 bits ? on: September 28, 2012, 06:13:37 am
You should check out AERY32 http://www.aery32.com/ . It's easy to use, cheap and very very tiny. Been playing with one for a few days now and I love it smiley.
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