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echo: rberrypi
to: A. DUMAS
from: A. DUMAS
date: 2019-02-04 06:16:00
subject: Re: Raspberry 3B+ undervo

A. Dumas wrote:
> Just believe what it says. You need either a:
> - power supply with higher voltage
> - better quality power supply with more constant voltage
> - shorter usb power wire
> - thicker usb power wire

I forgot:
- higher rated power supply that isn't near its limits at a current of ~1
A.

But the most likely reason by far is the quality of the power supply, where
quality means constant voltage for any current draw in the rated range.
Unfortunately commodity parts like usb power supplies don't come with
datasheets where you could see a response graph. It's all a bit hit & miss,
unless you go for "the official power supply". Btw, I never heard of the 1
or Zero having this trouble, maybe sometimes a 2 and a very shit power
adapter, but it got big with the 3.

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