I want to start some projects with Arduino and IoT, so the first things I need is an Arduino board, an Ethernet shield and a switch to connect it to the net. Also I need a power supply for the Arduino board, and I think that, better than a external USB AC wall adaptor or power supply, is modify the switch to add it a USB power port that can power the Arduino board. I’ve got at home a TP-Link TL-SF1008D, a simple 8 port 10/100 Mbps switch. So, let’s go to open it and add it the USB port!
The first thing we need is a Philips screwdriver to open it. I’ll add the USB port in the rear side, near with the RJ-45 connectors. I choose a USB Shielded I/O Type A Receptacle that I’ve got at home from Molex (Part Number: 105057-0001). So, after remove the electronics from the case, I put the connector on the position, mark the zone and cut it with a cutter. It seems that fits Ok, so the last check is mount again the board to ensure that the USB connector don’t hit it.