<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1443721524175_51563"><span id="yui_3_16_0_1_1443721524175_51622">One thing that bothers the heck out of me is if you look at the Pi, What is the largest component on the device? The GIANT RJ45 connector. How in this world where every thing has shrunk have we (as in the technical community) allowed this gross misuse of size with only a few wires be soooooo large?</span></div><div id="yui_3_16_0_1_1443721524175_51563"><span><br></span></div><div id="yui_3_16_0_1_1443721524175_51563"><span id="yui_3_16_0_1_1443721524175_52007">Why haven't we shrunk the ethernet connectors like everything else?</span></div><div id="yui_3_16_0_1_1443721524175_51563"><span><br></span></div><div id="yui_3_16_0_1_1443721524175_51563">Concerning designs that do not have power or cost limitations, clustered processors have switching ethernet chips with 1GB or larger swithcing fabrics built into the board itself. Or in the case of blade style computing, there is a network built into the backplane. This of course eliminates the connectors, except for some ouput ports to join the network. This is a long topic in and of itself.</div><div id="yui_3_16_0_1_1443721524175_51563"><br></div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr">My suspect is that TCP/IP is costly and power hungry. It never had the focus of low power use and has always been designed for throughput. This is not really a good combination for the robotics needs of efficiency on cost and power. Maybe this is why nobody has tried to morph ethernet into the small microprocessor world. On top of that TCP/IP has been a code hog in terms of valuable program space. Of course that problem is becoming less and less. </div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr"><br></div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr">I would be curious if anyone else has some thoughts on the reasons why ethernet has not shrunk.</div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr"><br></div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr">Despite the all these reasons, I still think a small ethernet form factor would be great for Pi or other platforms. It seems so simple and I am a bit amazed no one has attempted it.</div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr"><br></div><div id="yui_3_16_0_1_1443721524175_51563" dir="ltr">John Vaughters</div><div id="yui_3_16_0_1_1443721524175_51563"><span><br></span></div><div id="yui_3_16_0_1_1443721524175_51563"><span><br></span></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font size="2" face="Arial"> On Friday, October 2, 2015 8:37 AM, Pete Soper via TriEmbed <triembed@triembed.org> wrote:<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv7987412117">
<div>
WIthout a switching converter on the other end the wrong order of
magnitude of current is available:<br>
<br>
<a rel="nofollow" target="_blank" href="https://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits">https://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits</a><br>
<br>
<div class="yiv7987412117moz-cite-prefix">On 10/02/2015 07:02 AM, Jim Ray via
TriEmbed wrote:<br>
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<div class="yiv7987412117MsoNormal"><span style="font-size:11.0pt;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;color:#1F497D;"></span></div>
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-Pete<br>
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</div><br>_______________________________________________<br>Triangle, NC Embedded Computing mailing list<br><a ymailto="mailto:TriEmbed@triembed.org" href="mailto:TriEmbed@triembed.org">TriEmbed@triembed.org</a><br><a href="http://mail.triembed.org/mailman/listinfo/triembed_triembed.org" target="_blank">http://mail.triembed.org/mailman/listinfo/triembed_triembed.org</a><br>TriEmbed web site: <a href="http://triembed.org/" target="_blank">http://TriEmbed.org</a><br><br><br></div> </div> </div> </div></div></body></html>