[TriEmbed] I2C range extension

[Pete Soper]

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.

-Pete

On 10/02/2015 09:06 AM, Carl Nobile wrote:
> Pete,
>
> 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.
>
> ~Carl
>
>
> On Fri, Oct 2, 2015 at 8:36 AM, Pete Soper via TriEmbed 
> <triembed at triembed.org <mailto:triembed at triembed.org>> wrote:
>
>     WIthout a switching converter on the other end the wrong order of
>     magnitude of current is available:
>
>     https://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits
>
>     On 10/02/2015 07:02 AM, Jim Ray via TriEmbed wrote:
>>
>>     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.
>>
>>
>
>     -Pete
>
>     _______________________________________________
>     Triangle, NC Embedded Computing mailing list
>     TriEmbed at triembed.org <mailto:TriEmbed at triembed.org>
>     http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>     TriEmbed web site: http://TriEmbed.org
>
>
>
>
> -- 
> -------------------------------------------------------------------------------
> Carl J. Nobile (Software Engineer)
> carl.nobile at gmail.com <mailto:carl.nobile at gmail.com>
> -------------------------------------------------------------------------------

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20151002/c9613eee/attachment.htm>