I adjusted some of the values in the schematic to utilize the parts I had on hand. I also removed the 4049 gain circuit used in Collins' design. It had minimal effect in my Lunetta and there's no need to use it unless you are trying to square up the incoming signal; like from an electric guitar.
SpaceNuts by Draal
Galaxian by Draal
In the tracks above, I fed it the output of my 4052 module (4 inputs where A and B select which input is 'on'). SpaceNuts uses a 22n cap while Galaxian uses a 1uF cap. The larger cap doesn't track as acurately as the smaller one, but does offer a great "dive bomber" effect! Having a switch to choose between two caps like this sounds like a fun idea.
|Updated version for Lunetta Use|