How can I use a laptop keyboard as a USB keyboard?

My question is how can I also use a laptop keyboard with an adapter via USB, for example. The best is a fairly simple solution that is not too profound, such as studying the matrix keys.

What you wanna do?

Use the laptop keyboard as a keyboard for a PC and use USB?

You can connect your laptop to your PC, then have a 2nd screen + ne keyboard.

The principle is that I can use the laptop keyboard as a "normal" USB keyboard

Well the problem with the thing is that the keyboard is single and the Ne is too long a story but I would just like to use it as a USB device.

I think it's easier, you buy a USB keyboard for 8 euro (it's better than a laptop anyway)

Well the problem is that I wanted to build my laptop with a desktop mainboard and just need the laptop keyboard

Wait what

If you don't feel like / time / etc. If you have to separate the key matrix, then there are only 2 options:

By accidentally finding somewhere a finished documentation of the matrix of the model you are using, which you can then use to build your keyboard controller (e.g. With an Arduino).
Not at all.

Ok so i come up with something new