The Hattto is an optical tap tempo tremolo based on Electric Druid's TAPLFO3 IC and an optical circuit with two VTL5C2.
This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 8 knobs, up to 20mm diameter, for 6,3mm shaft separately.
Here is the bill of material: bill of material
This project is by PCB Guitar Mania, in collaboration with Musikding. If you have any problems with the contents of the kit, please contact Das Musikding (Klaus). For technical problems please contact PCB Guitar Mania: PCB Guitar Mania support.
Here is the direct link to the manual with layout and schematic: