C# Harmonic Minor scale on the guitar fretboard
The C# Harmonic Minor scale is made of C# (the root), D# (major second), E (minor third), F# (perfect fourth), G# (perfect fifth), A (minor sixth) and B# (major seventh). The fretboard shows every one of them across the neck in standard tuning (E A D G B E), and plays them back so you can hear the scale.
The harmonic minor scale is the natural minor with a raised seventh, which leaves a gap of three semitones between the sixth and seventh degrees. That gap is easy to spot on the neck as a wider step. It sits between the natural minor and the melodic minor scale.