USB probing cable

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USB probing cable

Unread postby Michal » Sun Jul 07, 2013 6:33 pm

I always wanted to know how much various devices (like rpi) draw power from USB so I created this cable. Sniffing communication with oscilloscope is a bonus :)
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Re: USB probing cable

Unread postby Denis » Mon Jul 08, 2013 1:20 am

Well done. Nice pictures.

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Re: USB probing cable

Unread postby garrettwilkin » Mon Jul 08, 2013 1:31 pm

This is fantastic!

We have had issues finding a reliable power supply for the RaspberryPi. Usually the power issues crop up when we start adding USB devices to the Pi, particularly the WiFi dongle. It would be great to watch the power draw to see exactly how much the RPi is drawing when using the WiFi dongle.

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Re: USB probing cable

Unread postby Michal » Mon Jul 08, 2013 1:45 pm

garrettwilkin wrote:This is fantastic!

We have had issues finding a reliable power supply for the RaspberryPi. Usually the power issues crop up when we start adding USB devices to the Pi, particularly the WiFi dongle. It would be great to watch the power draw to see exactly how much the RPi is drawing when using the WiFi dongle.


Yes, that's why I build it. My rpi with wifi dongle on the picture consumes 400mA in idle
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