Date: 2026mar30
Product: JetKVM
Q. JetKVM: Powering my setup with only one wall plug
A.
Before JetKVM
The PC was plugged into the wall.
I had one Ethernet cable going to my server (PC).
That was fine. But...
After JetKVM
I needed two Ethernet cables - for server and JetKVM
so I used an old Ethernet hub (it had 5 ports).
But that required that it's power adapter be plugged in a drawing all the time.
The JetKVM drew its power form the USB port it was plugging in to.
I noticed that when I powered down the PC the USB port continued to supply power to JetKVM.
Even when the PC was powered down I was able to connect to the JetKVM
and virtually press the power button!
Improvement
So I bought a 3-port Ethernet hub that could be powered by USB
and plugged it into the PC. Of course, both the hub and JetKVM need to powered
all the time - whether the PC was or not - and this accomplished that.
I tested it and it worked!
So I am only using one plug for the system - the plug of the PC.
Diagram
Only power connections are show.
HDMI, Ethernet and ATX Power Control board are not shown.
┌─────────────────┐
│ │
│ Wall Power │
│ │
│ │
│ │
└────────┬────────┘
│
│ ┌─────────────┐
│ │ │
┌───────┼─────────┐ │ │
│ │USB │ Hub │
│ ┼──────────────────┤ │
│ │ │ │
│ PC │ └─────────────┘
│ │USB ┌─────────────┐
│ ┼──────────────────┼ │
│ │ │ │
└─────────────────┘ │ JetKVM │
│ │
│ │
└─────────────┘
With power connections.
Also showing HDMI, Ethernet but not ATX Power Control board
┌─────────────────┐ +
│ │ +
│ Wall Power │ + Ethernet
│ │ +
│ │ +
│ │ +
└────────┬────────┘ +
│ +
│ ┌─────────────┐
│ │ │
┌───────┼─────────┐ │ │
│ │USB │ Hub │
│ ┼──────────────────┤ │
│ │++++++++++++++++++│ │
│ PC │ └─────────────┘
│ │ +
│ │USB ┌─────────────┐
│ ┼──────────────────┼ │
│ │@@@@@@@@@@@@@@@@@@│ │
└─────────────────┘HDMI │ JetKVM │
│ │
│ │
└─────────────┘
Here's a photo:
