This was probably the simplest and yet one of the most successful projects I ever made. A Power over Ethernet or PoE Adapter, which allows the usage of Ethernet cable to transmit not only data but power as well for the network equipments.
This was the first project I made on eLab Hackerspace with Hugo Santos and Tiago Borba. It was developed because it would fix a problem we had: the access point was far away from the main switch and there weren't any power outlets nearby, so we had the access point's power supply next to the switch and had the power come through the Ethernet cable:
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