PoE Shield

The PoE shield will be compatible software-wise with the official Arduino Ethernet Shield, but also supply power to the board via 802.3af-2003 compliant Power over Ethernet.

Project Status

Design, BOM, schematic, and PCB layout complete, PCBs and parts received, revision 1 board assembly is in progress. Currently stalled due to the wrong PoE transformer in the BOM and missed purchase of the ethernet controller chip. Ethernet chip ordered from SFE 2010-11-21.

Notes

Notes from Rev. 1

• Package has silkscreen already, just none on bottom of rev. 1 boards: For LM5070 library part put a notation for where pin 1 goes.
• Fixed in revision 2: C6 footprint does not match BoM (C6 should be 0603 or footprint to 1210)
• D2 has no silkscreen
• Fix footprint on U2 (Pads are too far apart lengthwise)
• Fix footprint for U3 (it's just generally wrong)
• Bigger test points (especially for prototypes)
• R108 should be 0603 (but is 0402)
• Had wrong PoE transformer (1x3.3v 1x5v windings instead of 2x12v)

Ideas for Rev. 2

• Could switch the main transformer to a POE13W3VERS-R (1.8/3.3/7V) or 7491192912 (3.3/5/12V) to avoid the need for secondary regulation all together