Check out these instructions on how to build your first synthesizer.
Granted, it’s not a Jupiter-8, but it’s fun to build, fun to play with, and cheap to build too. You can also bend it if you want to get even crazier sounds out of it. I built one myself last year, so I know what I’m talking about. I used the strip board layout and it worked out great. See it in the picture.
Build Your First Synthesizer [link]
