I’ve wanted a sequential switch for a while. Having researched them, I found that the Doepfer A-151 would be perfect for my needs and it’s nice and cheap. But I don’t want to buy one and, helpfully, Dieter has published the schematics for v1 along with instructions for adding the step switch on v2.
So, I made one. I made a small board for the panel components.
Cut, drilled and labelled a panel.
I added a row of right angle headers to attach the circuit, then totally freestyled the layout! Definitely not the most efficient use of the space, but it works.