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Power-over-Ethernet voltage regulator to make the Ethernet Shield a fully 802.3af-compliant Powered Device
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license Updated docs for new branding Jan 10, 2018
PoERegulator8023af.brd Fixed fonts for silkscreen and schematic Apr 24, 2019
PoERegulator8023af.sch Fixed fonts for silkscreen and schematic Apr 24, 2019 Updated docs for new branding Jan 10, 2018

Freetronics Power-over-Ethernet 802.3af Regulator

Copyright 2010-2013 Freetronics Pty Ltd
Copyright 2018 SuperHouse Automation Pty Ltd

Module to regulate power supplied on Power-over-Ethernet connection down to 10Vdc for supply to the on-board voltage regulator in an Arduino Uno or other compatible board using the Freetronics Ethernet Shield, or boards with onboard Ethernet such as the Freetronics EtherTen, EtherMega, and EtherDue.

The output can optionally be switched to 12V which can be useful for supplying power to external loads such as 12V relays.


  • Adds 802.3af-compliant Power-over-Ethernet "PD" (powered device) support to the Freetronics Ethernet shield and other Freetronics boards.
  • Input voltage range 36-57Vdc (nominal 48Vdc for 802.3af PoE)
  • Output voltage regulated to 10V and fed to Arduino on-board voltage regulator via Ethernet shield for further regulation down to 5V.
  • Plugs directly onto Freetronics Ethernet Shield and other Freetronics boards.
  • "Power on" LED.

More information is available at:


The design is saved as an EAGLE project. EAGLE PCB design software is available from free for non-commercial use. To use this project download it and place the directory containing these files into the "eagle" directory on your computer. Then open EAGLE and navigate to the project.


The specific terms of distribution of this project are governed by the license referenced below.


Licensed under the TAPR Open Hardware License ( The "license" folder within this repository also contains a copy of this license in plain text format.

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