USB Power Monitor

Posted on Thursday, January 17th, 2013 in sensors, USB by DP


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 on Thursday, January 17th, 2013 at 7:00 pm and is filed under sensors, USB. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “USB Power Monitor”

  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.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Peter: Another sunday, another chance...
  • Louis Beaudoin: This is great work guys! Placing an order for a sample pack and hope to use the service to make a custom cable soon.
  • Parkview: Another great idea! Be handy to be able to purchase the corresponding SMD and TH sockets as well.
  • Ryan White: Second that. I'd love the option to extend this already awesome tool to RF cables, hoping it's already in the works because I know the...
  • Tom Keddie: Hi Ian, Congrats on the launch. Suggest you name all the CHRO connectors you have as female. It's not done often but you can insert...