The rotary phone dial is the pinnacle of user interface for satisfying, slow number entry! Originally designed for dialing phone numbers, you can now re-purpose this beautiful piece of machinery as a USB number pad to use with your computer or mobile device.
With the KB2040 Kee Boar and a bit of CircuitPython code, you can read the mechanical dial pulses and convert them to USB HID number key messages. You can also modify the code to type letters, or go even further and make your phone send MIDI messages.
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