Another one of these nice little PT2399 projects to try out. This was a from a schematic posted by Merlin Blencowe and it seems to give a nice range of vibrato and chorus sounds for such a simple design, using just the PT2399 IC and nothing else driving it.
Clip made by Merlin (he posted that any noise was due to his recording setup and not the effect).
Yes the chips can be temperamental, but the results can be great for some of these effects. Just don’t forget to buy 10 x PT2399’s and keep trying them until you find one that works :o)
