Difference between revisions of "PoE Shield"
From Hackstrich
(Parts are here.) |
(Note about R9.) |
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* R108 should be 0603 (but is 0402) | * R108 should be 0603 (but is 0402) | ||
* Had wrong PoE transformer (1x3.3v 1x5v windings instead of 2x12v) | * Had wrong PoE transformer (1x3.3v 1x5v windings instead of 2x12v) | ||
| + | * R9 should be 0.33Ω, not 33Ω. | ||
=== Ideas for Rev. 2 === | === Ideas for Rev. 2 === | ||
Revision as of 22:05, 28 November 2010
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. Was stalled due to missing (forgot to order) Wiznet controller chip and wrong transformer. Both replacement parts are now here, waiting for time to try them out.
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)
- R9 should be 0.33Ω, not 33Ω.
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
