Squidward adds a swelling octave up to the signal.
This kit contains the PCB and all necessary parts. The enclosure can be selected, no knobs needed.
Here is the bill of material: bill of material
This project is by PedalPCBs, in cooperation with Musikding. If you have any problems with the contents of the kit, please contact Das Musikding (Klaus).
Here is the direct link to the manual with layout and schematic: