RJ45 + POE schematics?

07 Jan 2012


After reading the topic http://mbed.org/cookbook/Ethernet-RJ45, and beeing "less" knowledgeable on the magnetics department, i thought i'd better ask this and look dumb, in stead of blowing up 3 MBED's.

Has anyone experience in setting up an a DUMB RJ45 using POE? Or point me to a schematic / parts list for a female connector i can somewhat rugged install in the wall of a console?

I'm considering this: http://www.yds.com.tw/driver/drivers/13F-20XX%20Series%20PDF%20Catalogue.pdf behind a dumb RJ45.

I want to power 2 consoles (14 keys, an lcd and an MBED) over a 100Mbit network using POE and 10 - 15 meter cables. I feed the cable with 12V, and use an UBEC (mini switching power supply) to feed 5V to the MBED and the LCD.

Any insight would be welcome!

Theo (NL)

07 Jan 2012

This is a low cost solution using the unused pairs (in 10/100 MBit mode) of a standard ethernet cable:


26 Apr 2013

If you want to stick to the standard, there are plenty of POE Injector & Splitter on eBay. here are some Injector I used.

http://www.alliedelec.com/search/productdetail.aspx?sku=70024944 http://www.joynet-tech.com/index.php?option=com_content&view=category&id=5&Itemid=23&lang=en