<p dir="ltr">I'm contemplating battery / solar power configurations, and want to minimize power consumption to prolong usage.</p>
<p dir="ltr">No serious application: just tinkering. That's what Pis are for, right? ;)</p>
<div class="gmail_quote">On May 18, 2013 11:42 AM, <<a href="mailto:jep200404@columbus.rr.com">jep200404@columbus.rr.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Sat, 18 May 2013 09:59:46 -0400, Scott Merrill <<a href="mailto:skippy@skippy.net">skippy@skippy.net</a>> wrote:<br>
<br>
> Can someone tell me - in general - which would draw more power on a<br>
> Raspberry Pi: a USB WiFi adapter or the onboard Ethernet port?<br>
<br>
That depends on the USB Wifi adapter. I have an old one that I<br>
think pulls around 450 mA. That's much for any USB thing,<br>
and much more than the ethernet port uses.<br>
However, for newer Wifi adapters, althought I just don't _know_<br>
how much power they use, it's likely to be much less than my<br>
old Wifi adapter.<br>
<br>
Look at the output of lsusb to see the claimed max power for<br>
each USB thing you try. IIRC, the Pi's ethernet port is a USB<br>
device.<br>
<br>
I guess in your case the power supply comparison would be<br>
USB Wifi versus _incremental_ power used by ethernet port<br>
when something is plugged into it and schlepping bits back<br>
and forth.<br>
<br>
> Or is the power draw differential so inconsequential as to not be worth<br>
> worrying about?<br>
<br>
That depends on what your power concerns are. If you are running<br>
on batteries, it can be a big big concern. My Pi was flaky because<br>
the wall wart I was using just was not powerful enough. After I<br>
started using a more powerful wall wart, it became reliable.<br>
In some other applications, heat can be a concern.<br>
<br>
Besides curiosity, what power concerns do you have?<br>
<br>
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</blockquote></div>