I have a project where I'm providing power via the DC jack to my Arduino then accessing the DC power via the VIN pin. According to this http://forum.arduino.cc/index.php?topic=453955.0 I am ok to draw up to 1A from the VIN pin. I have measured 400ma out of VIN, so ok on that front.
But according to this http://playground.arduino.cc/Main/ArduinoPinCurrentLimitations I can draw max 400ma, So I'm a bit confused, which is the correct amount of power VIN can supply if the Arduino is being powered via the DC jack?
If I take the first thread as correct and assume it's ok to draw up to 1A from the VIN pin (from the DC power jack), is it ok to ground that current on the Arduino GND pin ? if VIN can supply up to 1A then I assume that it's ok to ground up to 1A, is this correct?
All help appreciated