51 Neptune guitar tuner (fixed window)

51 : Neptune guitar tuner (fixed window)


How it works

Uses a set of registers to divide the clock, and then some combinational logic to convert from binary to decimal for the display.

Puts a slower square wave output on output 7.

How to test

After reset, the counter should increase by one every second.


# Input Output
0 clock segment a
1 reset segment b
2 clock config A segment c
3 clock config B segment d
4 measured frequency input pulses segment e
5 none segment f
6 none segment g
7 none display select