Testing the Power Supply

[ZXBasicKID]

Hi,

I wonder if anybody can help me.

I have a Raspberry Pi 3b+ and occasionally I am getting voltage warnings (OSD)using an official RPi PWS. I've swapped for another official PWS and still get the same warning message. So, I wanted to know if there is a simple and safe way of testing the PWS output using a multimeter?

Thanks

Scott

[FTrevorGowen]

Hi,
I wonder if anybody can help me.
I have a Raspberry Pi 3b+ and occasionally I am getting voltage warnings (OSD)using an official RPi PWS. I've swapped for another official PWS and still get the same warning message. So, I wanted to know if there is a simple and safe way of testing the PWS output using a multimeter?
Thanks
Scott

What do you have connected to your P3B+ ? (Mine works fine with an older, lower current "Official PSU"**)
Trev.
** Perhaps not that "simple" but, FWIW, here's my test results (and there are links to the method/tools used in that, and, associated pages): http://www.cpmspectrepi.uk/raspberry_pi ... _Models.29

[Imperf3kt]

A multimeter is not accurate enough, you'll want an oscilloscope.