USB Power Monitor

in sensors, USB by DP | 4 comments


The December 2012 issue of the Australian electronics magazine Silicon Chip features the USB Power Monitor. It uses a PIC18F45K80 to monitor the power consumption of a USB device. The board acts as a bridge between the host and the device with a USB A male on one side, and the USB A female jack on the other.

Via tronixstuff – featuring a review of the device.

This entry was posted in sensors, USB and tagged , , .


  1. Remorilla says:

    I hope somebody make an opensource version of it.
    Very cool gadget.

  2. Sleepwalker3 says:

    SC has done a lot of cool stuff over the years

  3. Prasinos says:

    FriedCircuits offer a similar device, the USB tester. It stands between the USB port and the device being powered and exposes the usb wires so you can check current/voltage with a multimeter. It’s well constructed.
    It doesn’t have its own display so far, but FriedCircuits are designing an OLED display as a “backpack” for it.
    It’s available on
    [No affiliation, just a satisfied customer]

  4. Sleepwalker3 says:

    Silicon Chip actually put out a simpler version without a meter a couple of years back, you just use your Multimeter, similar to the Fried Circuits one. but with a small series resistor to measure current without breaking the circuit.

    Partial article here

    PCB pattern PDF for above available here

    PCB available for purchase here

    Unfortunately you can only get the full article if you are a subscriber or pay for the article, though it’s very simple. I do have the print copy around somewhere.

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