Nice use for an old phone dialer, and convert the values using an arduino. Then you could use that for something else (maybe build up a phone system with the old dialer).
https://www.instructables.com/id/DIY-Analog-Dialer-to-USB-Keyboard/
Nice use for an old phone dialer, and convert the values using an arduino. Then you could use that for something else (maybe build up a phone system with the old dialer).
https://www.instructables.com/id/DIY-Analog-Dialer-to-USB-Keyboard/