Questions about planning, installing, and servicing all kinds of electrical cabling, such as power, phones, computer networks, speakers, antenna, and so on. See also the [data-wiring] tag.

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I want to run USB to every room in the house

I want to run USB to every room in the house. I saw USB wall sockets on the internet. Is it possible (using multiple Raspberry PI or some sort of extenders) to have USB in every room? I'm thinking I ...
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How do I wire magnetic door contacts?

I want to follow this project and install my own home alarm system based on raspberry pi. I m having some trouble in understanding the built-in alarm cables and connecting the magnetic door contacts. ...