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Im not much of a programmer, but i love the simplicity of the hardware. I might be able to add a display and controls. I'd want to use I2C and a rotary encoder. I cant make any promises i cant keep, except if i do come up with anything, I'll post it here.
I do like that idea. I'll have to look around to see whats available these days. That would add a nostalgic look to it, and make it easy to change frequency. Electricaly, I think it will require one output per digit and 5 inputs if i multiplex. Ill have to do an I/O count to see if an Arduino has enough.
Arduino Stepper Motors