<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Thanks for the correction. So 300ma through each of the two
power-carrying pairs. But if we recall Brian's Ohm's Law talk and
look at the voltage drop across 26 gauge wires we see where the
limit really comes from. The voltage drop is spectacular for even a
few dozen feet.<br>
<br>
-Pete<br>
<br>
<div class="moz-cite-prefix">On 10/02/2015 09:06 AM, Carl Nobile
wrote:<br>
</div>
<blockquote
cite="mid:CAGQqDQKVMnhG+vh_Ax9zG5bik70adoAGX3J7bTKd1DTV-58_gQ@mail.gmail.com"
type="cite">
<div dir="ltr">Pete,
<div><br>
</div>
<div>I just checked, there are two specs PoE and PoE+. The first
one has a maximum current of 300mA and the second one has a
max of 600mA. Obviously both are too low. Too bad, this was a
good idea.</div>
<div><br>
</div>
<div>~Carl</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Oct 2, 2015 at 8:36 AM, Pete
Soper via TriEmbed <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:triembed@triembed.org"
target="_blank">triembed@triembed.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> WIthout a switching
converter on the other end the wrong order of magnitude of
current is available:<br>
<br>
<a moz-do-not-send="true"
href="https://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits"
target="_blank">https://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits</a><span
class=""><br>
<br>
<div>On 10/02/2015 07:02 AM, Jim Ray via TriEmbed wrote:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Has
anyone modified Raspberry Pi to use PoE for
power? Using standard Ethernet to drive a
communications sub system based on another
Raspberry Pi that has the requisite i/o and
processor makes a lot of sense to me.</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"></span></p>
<br>
</div>
</blockquote>
<br>
</span> -Pete<br>
</div>
<br>
_______________________________________________<br>
Triangle, NC Embedded Computing mailing list<br>
<a moz-do-not-send="true"
href="mailto:TriEmbed@triembed.org">TriEmbed@triembed.org</a><br>
<a moz-do-not-send="true"
href="http://mail.triembed.org/mailman/listinfo/triembed_triembed.org"
rel="noreferrer" target="_blank">http://mail.triembed.org/mailman/listinfo/triembed_triembed.org</a><br>
TriEmbed web site: <a moz-do-not-send="true"
href="http://TriEmbed.org" rel="noreferrer"
target="_blank">http://TriEmbed.org</a><br>
<br>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
<div class="gmail_signature">-------------------------------------------------------------------------------<br>
Carl J. Nobile (Software Engineer)<br>
<a moz-do-not-send="true" href="mailto:carl.nobile@gmail.com"
target="_blank">carl.nobile@gmail.com</a><br>
-------------------------------------------------------------------------------</div>
</div>
</blockquote>
<br>
</body>
</html>