I am currently building a Corne keyboard by following this guide.

bulk = 4 keyboards. Some stuff is cheaper (such as the hot-swap sockets) if you build more at once, but who is building 10 keyboards for personal use?

Component What I got Price Amount for One Keyboard Total for One Keyboard Note
MX Key Switch Keebwerk Tacit Switch V1 $2.00 4 (3.75 if bulk) $8 ($7.50 if bulk) $2.00 for 10 switches, a keyboard needs 36, so we need 4 packs ($8.00). For 4 keyboards, you would need 144 switches, so 15 packs, aka 3.75 per keyboard ($7.50).
MX Key Cap Some Random Chinese XDA profile PBT keycaps $11.00 1 (0.75 if bulk) $11.00 ($6.75 if bulk) One pack contains 60 keycaps, and I got 3 packs for 4 keyboards.
MX Hot Swap Sockets Yet Again Some Chinese Crap Off Amazon $13.33 1 (0.5 or even less if bulk) $13.33 ($6.67 or even less if bulk) One pack contains 110 Hot-Swap sockets, I need 36 per keyboad, so 144 in total for 4 keyboards. I got 2 packs.
Diodes Reland Sun 1N4148 SOD-123 Diodes $6.77 1 (0.5 or even less if bulk) $6.77 ($3.39 or even less if bulk) One pack contains 100 diodes, I need 36 per keyboard, so 144 in total for 4 keyboards. I got 2 packs. You can probably find a better deal and not have so much left over.
3.5mm TRRS Connector VegGieg 3.5mm Jack $1.76 1 $1.76 It's just a 3.5mm TRRS cable, just get the cheapest one that isn't 15 cents.
3.5mm TRRS Sockets Motorobit PJ-3200 3.5mm Stereo 4-Pin SMD Jack $0.10 2 $0.20 One for each hand.
Reset Buttons (2 pin, 3x6x4.3mm) Motorobit 2 Pin 3x6x4.3mm SMD Button $0.04 2 $0.08 One for each hand as well.
Pro Micro Controller Robolink Arduino Pro Micro Klon 5V 16Mhz $6.60 2 $13.20
Toggle Switch (3 Pin) Haven't got it yet. I want either MSK-12C02 or PCM12SMTR as the guide says, or something that is similar. ? 2 ?

Total cost for one keyboard: $54.33 (or $37.04 or less if bulk) (this currently only includes parts I have bought, it will increase slightly as I get the final ones).

I will update this post as the parts arrive.

Stuff that I don't even know what to get, but need:

  • 4x Machined 12 Pin Sockets
  • 48x Machine Pins (this and the previous one aren't actually required, but I do not want to hard solder the Pro Micro clone)
  • A USB-C or Micro-USB cable based on what the Pro Micro clone has
  • PCBs (oh god)

RAMBLINGS OF A MADMAN