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Topic: VIN Pin on Arduino Due: Sourcing (Read 923 times) previous topic - next topic

dgelman

How much current can the VIN Pin provide?  Is it regulated?  I cant seem to find out the schematic.

Or is it a straight connection from the barrel jack?

http://arduino.cc/en/uploads/Main/arduino-Due-schematic.pdf

Thanks,
Daniel
Dialup is the future.

Graynomad

#1
Jul 10, 2013, 02:20 am Last Edit: Jul 10, 2013, 02:23 am by Graynomad Reason: 1
It's a straight connection to the barrel jack almost, it goes through an inductor but that won't affect you I think.

The jack on on the schematic between the two USB ports.

EDIT: The PCB traces may be a limitation current wise, I've not looked at them.

_____
Rob
Rob Gray aka the GRAYnomad www.robgray.com

retrolefty


It's a straight connection to the barrel jack almost, it goes through an inductor but that won't affect you I think.

The jack on on the schematic between the two USB ports.

EDIT: The PCB traces may be a limitation current wise, I've not looked at them.

_____
Rob


Actually the limit is most likely the series polarity protection diode wired between the power connector's positive contact and the input to the on-board +5vdc voltage divider. That diode has a 1 amp max continuous rated diode as I recall.

Lefty

dgelman

Lefty,

Does this mean that VIN will only source 1A of current? I am developing an Arduino shield for the Due that has 3 motor drivers as well as an xbee module.  I was planning on using the VIN pin, to power the drivers as well as the 5V pin to be regulated down for the XBEE but now I might have some issues. 

My motors are 12V 300mA free running. x3 this will draw too much current if VIN only supplies 1A. Looks like I might have to do some external power.

Daniel

Dialup is the future.

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