Basic Initial Build Questions (Grounding)

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Irakandjii
Posts: 4
Joined: Tue Sep 09, 2014 2:44 am

Basic Initial Build Questions (Grounding)

Post by Irakandjii » Mon Sep 29, 2014 10:42 pm

Hi
I purchased this board because I am starting learning adventure into electronics.

I have the board working and now want to place it in a more robust case.

Grounding
1) I purchased an aluminum case;
a) Should I ground the case to earth ( I believe so but just checking)
b) Should the board itself be grounded to the case, I was thinking of using brass offsets of 15 mm length on each of the four (4) corners

My plan was to purchase a surface mount USB connector that would be mounted on the case with an internal cable to the Red Pitaya. I don't want a "jerked cable" to damage the RP.

Thanks in advance

Irakandjii
Posts: 4
Joined: Tue Sep 09, 2014 2:44 am

Re: Basic Initial Build Questions (Grounding)

Post by Irakandjii » Sun Oct 05, 2014 3:49 pm

Anyone? It seemed a simple question?

Nils Roos
Posts: 1441
Joined: Sat Jun 07, 2014 12:49 pm
Location: Königswinter

Re: Basic Initial Build Questions (Grounding)

Post by Nils Roos » Sun Oct 05, 2014 4:15 pm

My first thought was to better leave that question for the experts in measurement equipment, because proper grounding is not a trivial matter.
But since nobody else seems to have an opinion on the matter, I took my trusty multimeter just now and checked how the professionals do it (in this case the engineers at Tektronix).

It turns out that all BNC sockets on my scope have their shielding tied to mains ground, so I see no reason why you shouldn't do the same.

Some more quick measurements on the RP however revealed, that the pads around the 4 mounting holes are not connected to anything, so fixing the RP to your case with metal screws and brass distance pieces will not provide grounding to the case.

Irakandjii
Posts: 4
Joined: Tue Sep 09, 2014 2:44 am

Re: Basic Initial Build Questions (Grounding)

Post by Irakandjii » Tue Oct 07, 2014 4:13 pm

Thank you

Irakandjii
Posts: 4
Joined: Tue Sep 09, 2014 2:44 am

Re: Basic Initial Build Questions (Grounding)

Post by Irakandjii » Tue Oct 07, 2014 4:14 pm

Thank you

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