Keyboard Signal Converters
This device converts any regular keyboard into a wireless bluetooth keyboard. The SAMD microcontroller interfaces with the keyboard over the USB HID protocol, reads the signal then converts it into a BLE HID command.
This second device I made is attached to an old Dell mechanical keyboard that uses the PS/2 protocol. I am using a Teensy to convert the PS/2 commands to USB HID commands.
I also connected a relay so the solenoid actuates at each click, replicating the old IBM keyboards!