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Unread 15-01-2015, 22:48
nighterfighter nighterfighter is offline
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AKA: Matt B
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Re: Camera Problems

The camera runs off of 5V, off USB. (Unless you are using ethernet) I don't think that is going to be drawing lots of current. The maximum current USB 2.0 ports are rated for is 500 mA... (Well, those are the standard values. There are exceptions of course, such as for charging and such, but I'm guessing the roboRIO doesn't allow the USB port to draw much more than 500 mA).

Something else is killing your battery, it isn't the camera.

Edit: I stand slightly corrected. According to the roboRIO documentation (file:///C:/Users/Matt/Downloads/roboRIO%20Specifications.pdf) the maximum current draw for the USB ports is 900 mA.
Still not enough to notice any significant drain on the battery.

(And just because it is CAPABLE of sinking that much current, doesn't mean the camera is necessarily attempting to draw that much current).

Edit2:

As to answer one of your questions: "Maybe like having the camera take power from a different power supply"

The answer to that is no. The only legal source of power on a FRC robot is the one 12V battery. From that battery, all the electronics must be powered.
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Last edited by nighterfighter : 15-01-2015 at 23:05.
 


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