I modded the Phozer LFO and included a depth control. Pin 5 (+) can be the Phozer filter section Vr or and independent Vr, but not Pin 3 (+).
(http://geocities.com/guitarfxs/images/LFO.gif)
mac
I'm going to try it on the EA Trem, using an LDR instead of the fet. When the led is bright the LDR resistance is low, say 100 - 500 ohms, so the cap is almost fully bypassed, and the gain is max. When the led is off the gain is min.
mac