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pcmola
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What is this?

Sat May 11, 2019 11:29 am

Image
I am wondering what the silver square is, with the Raspberry Pi logo on the top left.

epoch1970
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Location: Paris, France

Re: What is this?

Sat May 11, 2019 11:30 am

It is the enclosure for the wifi module.
https://www.raspberrypi.org/blog/raspbe ... le-now-35/
"S'il n'y a pas de solution, c'est qu'il n'y a pas de problème." Les Shadoks, J. Rouxel

plugwash
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Re: What is this?

Thu May 16, 2019 6:32 pm

It's a shielding can.

With the raspberry pi 3 model B the board was EMC certified as an end product. That was fine for end-users but it created problems for people wanting to use the Pi as part of a larger product. They essentially had to do the full "intentional radiator" EMC tests again.

To make life easier for people using the Pi as part of a product they decided to certify the 3B+ under the more stringent requirements for RF modules. To meet those requirements a metal can got put over the top of the wifi/bluetooth circuitry.

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