The Homebrew Electronics Psilocybe is a phase shifter pedal is made by and it can produce several different trippy sounds. I rehoused the pedal in a smaller box with the jacks on top so that I could fit it on my pedalboard.
It can sound similar to a Univibe pedal at some settings, though a little more phasey and a little less liquidy.
The two switches allow you to change the sound pretty dramatically with some settings yeilding almost a wah-wah effect.
Interestingly there is no knob to control the intensity of the effect so it’s always pretty much full on. Slowing down the sweep can make it seem less obvious, though.