What does "cutting the short on SB3" means?

RE: What does "cutting the short on SB3" means?

awneil — Tue, 25 May 2021 08:50:51 GMT

[quote userid="101494" url="~/f/nordic-q-a/75378/what-does-cutting-the-short-on-sb3-means/311325#311325"]Are there any contradictions?[/quote]

Not sure what you mean by that - contradictions of what with what?

[quote userid="101494" url="~/f/nordic-q-a/75378/what-does-cutting-the-short-on-sb3-means/311325#311325"]Wouldn't that be a problem concerning the hardware, knowing that there is an online power profiler[/quote]

AFAIK The online power profiles only considers the SiP/SoC itself - it doesn't consider any external hardware?

RE: What does "cutting the short on SB3" means?

ActiTAG — Tue, 25 May 2021 07:38:58 GMT

Are there any contradictions? Wouldn't that be a problem concerning the hardware, knowing that there is an online power profiler?

RE: What does "cutting the short on SB3" means?

awneil — Thu, 20 May 2021 09:48:25 GMT

[quote userid="101494" url="~/f/nordic-q-a/75378/what-does-cutting-the-short-on-sb3-means/310668#310668"]how can I cut this link[/quote]

Or, if the link is actually shorted by solder or a zero-ohm link:

EDIT

You can download the schematics & board layouts - go to 'Downloads' on the Product Page:

https://www.nordicsemi.com/Software-and-tools/Prototyping-platforms/Nordic-Thingy-91/Download#infotabs

see "Hardware files"

From that:

where you can see SB3 and SB4:

which shows that they do, indeed, have a link to cut with a knife.

RE: What does "cutting the short on SB3" means?

ActiTAG — Thu, 20 May 2021 09:41:23 GMT

Thank you for your answer, it's clear! Here a link on the pdf Nordic Thingy:91 (nordicsemi.com) p35/36.
So how can I cut this link between the two halves, please?

RE: What does "cutting the short on SB3" means?

awneil — Thu, 20 May 2021 09:17:04 GMT

It would help if you gave a link so we can see exactly what you're talking about - in context.

Generally, "SB" refers to a Solder Bridge:

https://resources.altium.com/p/solder-bridge-jumper-best-practices-pcb-design

in the above, you can see that SB40, SB26, and SB34 all have a little link between the two halves - that'll be the "short circuit" they're talking about.

It's functionally identical to fitting/removing a jumper link:

but smaller, cheaper, more reliable, etc ...