# Arduino max current

Hi,

I have a simple question…

How much of current i can get from arduino mega if is connected to pc?

Thank Koudy

KoudyDevCZ: Hi,

I have a simple question...

How much of current i can get from arduino mega if is connected to pc?

Thank Koudy

From what on the Arduino mega?

From the 5V connector, from one pin, or from all pins combined?

!c

KoudyDevCZ: Hi,

I have a simple question...

How much of current i can get from arduino mega if is connected to pc?

Thank Koudy

The ultimate limit is 500ma due to USB standards and the polyfuse wired used in the board. Now using all 500ma is only possible with careful understanding of pin limits, total chip limits, and proper use of external switching devices that use the arduino +5vdc voltage.

Lefty

drone:

KoudyDevCZ: Hi,

I have a simple question...

How much of current i can get from arduino mega if is connected to pc?

Thank Koudy

From what on the Arduino mega?

From the 5V connector, from one pin, or from all pins combined?

!c

From the 5V connector and from all pins combined ... ?

Koudy

from all pins combined

200mA is the maximum of all the combined pins, no one pin to exceed 40mA These are absolute maximum ratings. The data sheet says:-

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The 5v rail if driven from the USB then with a 500mA limit less that that. If driven from the on board regulator then it depends on what the input voltage is, the limit is given by the power dissipation of the regulator and is discussed here:- http://www.thebox.myzen.co.uk/Tutorial/Power_Examples.html

KoudyDevCZ: From the 5V connector and from all pins combined ... ?

In many applications, I/O pins really should not be used as power sources (or sinks). Your questions leads me to ask: What are you trying to do?