i'm not sure.

But I do know that other designs that were based off the TelosB state that
it is a bad idea
to power from the USB with batteries installed.   Other designs provide a
jumper that switches
between usb power and bat power.

The safe thing to do is remove the batteries.    Or pull the TelosB
schematics, I don't remember where they
are, and study the problem.

If you try to find the schematics and fail, let me know, I have them
somewhere.  But please do try to find
them yourself first.

eric


On Thu, Mar 24, 2011 at 1:11 PM, Joey Wilson <[email protected]> wrote:

> All,
>
> I have a question about the TelosB battery power. I'm wondering if I leave
> a TelosB plugged into a USB port, so it's getting it's power from the port,
> and also leave two AA batteries inserted, will the AA batteries drain at all
> if the USB continues to deliver power? Is there a circuit in the hardware
> that turns off battery power if USB is connected?
>
> Thanks,
> Joey
>
> _______________________________________________
> Tinyos-help mailing list
> [email protected]
> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>



-- 
Eric B. Decker
Senior (over 50 :-) Researcher
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