MF50 - Open-Source Drop-in IBM M50 Capacitive Replacement PCB

[taylorswiftttttt]

In these pictures, the silkscreen around the pin header is wrong (too many GNDs). I have corrected this.




Source: https://github.com/nearestexit/MF50/

QMK Firmware: http://35.164.28.200:5000/#/xwhatsit/ib ... sal/LAYOUT

Gerbers:

gerber.zip

(181.54 KiB) Downloaded 77 times

This PCB is designed for the M50. Although it shares the F50's matrix and is designed to emulate the capacitive PCB from the F50, I think it is unlikely it would function with the F50's original controller and I cannot guarantee it will fit at all. I did not have an F50 PCB on hand when I designed this.



A "standard" SMD Model F Controller fits nicely in the bottom case. I have not tested it with the "4704" version.



YOU MUST GROUND THE BACKPLATE TO THE CONTROLLER!

YOU MUST INSULATE THE PCB FROM THE BACKPLATE!
If there were no testpoints, you might be able to get away with no additional insulation besides the soldermask, but because there are column testpoints on the back, you must insulate them somehow. I cut out an insulation sheet out of 0.1mm PVC: https://www.amazon.com/dp/B095N7TMZH

Ordering from JLCPCB:

Spoiler:

Credits:
dorkvader & kishy - for providing me with detailed pictures of the F50 PCBs
purdeaandrei
theMK
ViviLazuli

[mmm]

Great work! Thanks for sharing this!