HATs and other add-ons • Raspberry Pi w/ 24 switches & hat

Hi there,

for an art installation project, I need to connect 24 switches to a Raspberry Pi 4.

3 questions.

1 / number of pins
As far as I know, there are 26 gpio available on Raspberry Pi 4, right ?
(sometimes confused with those optionnaly handling i2c etc)

2 / hat (& box?)
I heard about this kind of hat : https://thepihut.com/products/gpio-screw-terminal-hat
Do you have other recommandations ?

I also read about https://czh-labs.com/products/rpi-screw ... -4-model-b
and

These come with an enclosure. Do you have any feedbacks on them ? Or other recommandation for an enclosure with that kind of hat ?

3 / grounding
There are 4 grounds.
I was thinking about grounding like this: group of 6 switches' grounds connected to 1 of each 4 grounds connectors.
I know all ground are only one, but for connections purpose, it could help.
Any best practices here?


Thanks a lot in advance.

Statistics: Posted by julienbayle — Thu May 02, 2024 10:22 am

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