North Devon Tech Club

Raspberry Pi 3/b under voltage warning?

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MailingList 5 months ago

From Chris Bolton on the mailing list, 8 May 2026 17:19 UTC

I purchased a couple of 2nd hand RPI 3/bs from ebay a few months ago and have finally got round to using them on a project.
I'm not overly familiar with the nuances of RPIs but was surprised they both indicated an "under voltage warning" when I powered them up from a 2A USB supply.  I tried different cables and different USB supplies but no change.  I see the official spec is 5.1V 3A so I thought they should be okay to be powered at 5V 2A for light duty tasks or have I got a couple of duds?

Best Regards

Chris

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MailingList 5 months ago

From Rowbs on the mailing list, 8 May 2026 18:13 UTC

I have the same with mine that is connected to my 3d printer. I ended up getting the one from the pi site and it still does it.

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