Posts: 5
Joined: Sun Jan 07, 2018 1:48 pm

Low voltage on Pi3 pins

Fri Jan 12, 2018 4:30 pm

I have a new pi and it boots fine, runs fine, nice little piece of hardware. However, the output pins show a low voltage. When i set a pin HIGH (using python GPIO and after setting it as output) it reads as 1 (yes, one) volt. When it's low, it's a 0 (zero). Even if i use my vmm to check voltage from 5v pins (or 3.3v pins) to ground it shows 1V. I changed power supplies (had been using the one supplied with a kit) to another, and no difference. Both are supposed to be 5.25V/2.4A. I have no reason to believe 2 supplies would both be bad.

So, do i have a moldy Pi? Is there something else i should be doing? Thanks in advance for help.

Posts: 10663
Joined: Fri May 31, 2013 9:28 pm
Location: Mansfield UK

Re: Low voltage on Pi3 pins

Fri Jan 12, 2018 5:01 pm

I suspect you are testing the wrong pins or to a pin other than ground, as testing from 5V pin to ground pin with your DVM on a working pi will return a value of around 5V depending on your power supply.

may be this will help



We want information… information… information no help
The use of crystal balls & mind reading are not supported

Posts: 11511
Joined: Wed Jan 25, 2012 6:39 pm

Re: Low voltage on Pi3 pins

Fri Jan 12, 2018 7:17 pm

Suspect your DMM. Maybe as simple as needing a new battery in it.
Quis custodiet ipsos custodes?

Return to “Troubleshooting”