Artist's commentary
Hang in There, Kogasa-san 3172
Honestly, I didn't have any electronic kit experience aside from the time I copied circuit diagrams for radios and intercoms from library magazines when I was an elementary student, so starting a circuit myself was a first for me.
I couldn't buy reference books at the time, so I wasn't able to understand why it worked.
Well, compared to analog, making a digital circuit is still simpler, so I thought I'd manage!