"David Higton"  wrote in message
news:94358e8157.DaveMeUK@my.inbox.com...
> In message 
>          Markus Robert Kessler  wrote:
>
>>sure, you're right -- just tested also with a very small PSU just for fun
>>since this one delivered 5.5 V open circuit. RPi3 ran fine and throttled
>>was 0x0. But as soon as a more power consuming command like iwlist was
>>executed, RPi was somehow "switched off"...
>>
>>Well, since it is hard to find a PSU with exactly 5.2 .. 5.3 Volts to
>>make RPi3 happy -- what about using a normal stable 7.5 Volts power
>>supply?
>
> What about using a shorter and/or thicker cable between the PSU and
> RPI?

I've had no problem with a bog-standard USB power supply (I think it was for
my Amazon Kindle), even powering a hard disc (spinning, not SSD) that was
plugged into the Pi. I only bought a Pi-certified PSU
https://www.amazon.co.uk/gp/product/B01CCR5P8U/ref=ppx_yo_dt_b_asin_title_o05__
o00_s00?ie=UTF8&psc=1
and a powered USB hub (for the HDD) to be extra sure that the Pi wouldn't
crash.

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