USB power surge with Red Board Qwiic

Development Boards Arduino
1

I am working with a couple of new red boards (Qwiic version). They’ve been switched to 3.3V and the jumpers to disconnect Qwiic have been cut. No shields plugged in, just bare red boards with factory sketches still in place.

A couple of times I plugged one into a TripLite U223-10 10-port hub on a Windows 7 box. Got the power surge warning and after a couple times, Windows shut down the entire hub until I rebooted the computer.

Thinking it was related to input capacitance on the red board, I manually discharged all the polarized caps on the board with a 10-ohm resistor prior to USB connect. I could not reproduce the power surge warning this way and haven’t seen it again (yet, that is).

Have you ever seen this before?

2

Haven’t seen that before, it’s hard to say what caused it.

You may have had an intermittent short circuit somewhere on that first plug in or possibly static electricity caused a false ‘power surge’ warning on the computer.

The RedBoard Qwiic uses so little power on it’s own that I don’t think you really need to worry too much about it.