comrade_grace
Posts: 3
Joined: Fri Oct 11, 2019 11:57 pm

My Raspberry Pi is electricuting me with TV Hat

Sat Oct 12, 2019 12:14 am

Hi,

My Raspberry Pi overtime seems to be having some form of electricity on its metal usb shell bits, and getting really hot (though I'm more concerned about the electricution). My setup is using a RPi 3, Official TV uHat plugged into a rooftop aerial and connected to a USB keyboard, mouse and plugged into ethernet. My TV Aerial has a powered distribution box in the loft that was here when we moved in, and I have discovered that occasionally this one line seems to have power running through it occasionally.

Any ideas? Sorry if I haven't been good at describing lol

Andyroo

Re: My Raspberry Pi is electricuting me with TV Hat

Sat Oct 12, 2019 5:34 pm

You may have answered it yourself:
My TV Aerial has a powered distribution box in the loft that was here when we moved in, and I have discovered that occasionally this one line seems to have power running through it occasionally.
Get a specialist in to replace it would be my thought from your description.

W. H. Heydt
Posts: 11097
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: My Raspberry Pi is electricuting me with TV Hat

Sat Oct 12, 2019 5:41 pm

The shells of the USB ports and Ethernet jack getting warm is to be expected. They're part of the general heat dissipation for the SoC.

ejolson
Posts: 3825
Joined: Tue Mar 18, 2014 11:47 am

Re: My Raspberry Pi is electricuting me with TV Hat

Sat Oct 12, 2019 6:13 pm

W. H. Heydt wrote:
Sat Oct 12, 2019 5:41 pm
The shells of the USB ports and Ethernet jack getting warm is to be expected. They're part of the general heat dissipation for the SoC.
As already mentioned, having mains voltage where ground should be is hazardous. I would suggest checking what's going on with a neon circuit tester such as this one.

Image

While much safer than verifying you have a ground fault by touching the shell of the Ethernet jack with your pinky finger, if you don't know enough about electricity to use such a device properly, it would be wise to let someone who does perform the test. Such things are available at Walmart here; however, anything can be dangerous if used improperly, especially with 250V.

comrade_grace
Posts: 3
Joined: Fri Oct 11, 2019 11:57 pm

Re: My Raspberry Pi is electricuting me with TV Hat

Sat Oct 12, 2019 9:19 pm

Andyroo wrote:
Sat Oct 12, 2019 5:34 pm
You may have answered it yourself:
My TV Aerial has a powered distribution box in the loft that was here when we moved in, and I have discovered that occasionally this one line seems to have power running through it occasionally.
Get a specialist in to replace it would be my thought from your description.
I've had a poke and this appears to be the case - I've somehow gotten an incompatible power supply which is distributing a small amount of current through the output coax cables probably not a safe setup at all but it works I guess, also it seems that my ancient fan seems to have grounding problems and has electric current going through the metal shell, of which the raspberry pi ethernet port was touching and therefore electricuting me :roll: and has now been thrown out and will be replaced shortly!

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