This is my 1960's IBM Selectric typewriter that has been converted to a modern day PC keyboard. The typewriter was purchased from eBay with a good case, but mangled internals. The internals were mostly stripped out and a KBDFans KBD67v2 PCB in a tray mount case was mounted to the original frame with some custom brackets. The PCB was modified to use the backlight LED control to fire small 5v solenoids to simulate a typewriter sound. Once of the solenoids strikes a project box that holds some of the electronics on any key press, and the other strikes the original bell when the enter key is pressed. The source code for this project can be found on my Github. A video of the keyboard in action can be found on my YouTube.
IBM Selectric Case
KBDFans KBD67v2 PCB
Gateron Yellow KS-3 Milky Top
Durock V2 Stabs
MT3 WoB keycaps
Adafruit 5v Solenoids
The case arrived in beautiful shape. I'm not sure how the insides got so bad.
Gutted
Tapping in to the LED control pins of the MCU to drive the solenoids
PCB and plate assembled and ready to be fit to the case
Keycaps on for fitment testing
Mounting to the original frame
The solenoids that drive the clack and ding
Keyboard fitted before top case cut
Completed and working.
testing my solenoid wiring and code