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Simple adapter for home-brew Power-over-Ethernet
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Freetronics Power-over-Ethernet 4-Channel Midspan Injector, Unregulated

Copyright 2010 Freetronics Pty Ltd
Freetronics site: <>
Freetronics email:

Trivial board to supply power to 4 remote devices via Ethernet connections. Has no voltage regulation at all: whatever you plug in will simply be sent down the wire, no questions asked. Be very, very careful with this or you may damage your Ethernet device!


  • Space for power supply decoupling capacitor: 470uF, 63V electrolytic recommended. Watch polarity.
  • Reverse-protection diode.
  • "Power On" LED.

More information is available at:

The "docs" folder within this repository includes a handy copy of the schematic in PDF format and image(s) of the pcb.


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 Projects -> eagle -> EthernetShield.


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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