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Measuring USB power cable voltage drop with my DC load

Posted on Wednesday, January 31st, 2018 in measurement by DP

p-dcload_built-600

Dr. Scott M. Baker published a new build:

This started when one of my raspberry pi projects failed due to voltage drop on the USB power cable that I was using, so I set out with my power supply and DC Load to measure the voltage drop of various cables that I use in my lab

More details on his blog here.

Check out the video after the break.

This entry was posted on Wednesday, January 31st, 2018 at 9:54 pm and is filed under measurement. 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.

One Response to “Measuring USB power cable voltage drop with my DC load”

  1. KH says:

    So it’s 6.5ohm on the dud cable, far worse than any common wire. Probably a bad soldering job, ha ha. The rest are okay, not gloriously good, but may surprise USB users not familiar with the voltage drop specs. The power switch is a concern, I’ve had experience with cheapo switches becoming unreliable after months.

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