Univibe electric guitar pedal circuit diagram
The UniVibe is well-known from Jimi”s use of it. The LFO is actually a phase shift oscillator, using the dual 250K pots inside the pedal assembly to control speed. A contemporary version would substitute an LED/photocell optocoupler for the four LDR”s and also the incandescent light bulb that makes the shifting function. This IS just a 4 stage phaser, possibly with some distortion from the signal path thrown in. Considering that the Univibe (r) is getting reissued by Dunlop, Dunlop most likely owns the “Univibe” trademark nowadays. This schematic bears no resemblance, except accidental, to the reissue that Dunlop or any person else might be developing.