Last time, I’ve explained everything you could want to know if you wanted to put an M.2 socket onto your board. Today, let’s build M.2 cards! There’s a myriad of M.2 sockets out there that are just asking for a special card to be inserted into it, and perhaps, it’s going to be your creation that fits.
Why Build Cards?
Laptops and other x86 mainboards often come with M.2 slots. Do you have a free B-key slot? You can put a RP2040 and bunch of sensors on a B-key PCB as an experimental platform carried safely inside your laptop. Would you like to do some more advanced FPGA experiments? Here’s a miniscule FPGA board that fits inside your laptop and lets you play with PCIe on this same laptop – the entire setup having a super low footprint. Are you looking for an extra PCIe link because you’re reusing your laptop as a home server? Again, your WiFi slot will provide you with that. Want to get some PCIe out of a SteamDeck? Building a M-key 2230 card seems to be your only hope!
There’s also plenty of space for simpler, less active devices. Do you only have a spare M-key slot, perhaps, an A or E key slot? You can replace your WiFi adapter with an extra SSD for extra storage, or perhaps, the other way around, put a second WiFi card into your second SSD slot for all your war ..
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