ZVEX Fuzz Probe 
 The Fuzz Probe is a kind of cross between a theremin and a fuzz factory. There   is a 3 5/8   copper plate mounted on a chunk of 3/8   clear acrylic that passes   over the top of the pedal housing, angles down to sharp turn, and goes back   to the pedal. Under the whole mess is a 3 5/8   by 7   sheet of aluminum that   provides shielding from annoying ground effects and wires under the stage.   It also serves to protect the knobs from being knocked off if you drop it on   them... and it makes a nice toe chopper if you are barefoot, so (legal disclaimer:)   DO NOT DROP THIS PEDAL ON YOUR FOOT! IT IS HEAVY AND HAS VERY POINTY CORNERS   THAT COULD DAMAGE LIVING CREATURES AND FINE HARDWOOD FLOORING. ALSO, YOU COULD   BREAK SOMETHING. Like your dog.
 What does this pedal do?
   Already, it should be apparent that this is the most dangerous pedal I have     every made. Ow! The copper antenna projects a field of RF energy that is     affected by your foot (or other appendage), altering the circuit that generates     it, an in so doing, increasing the brightness of that LED on the top of the     pedal and also controlling the STABILITY (STAB) knob on the back. I could     have made it just control that LED, I mean, that's enough for some people,     but nooo, I went and connected it to the stability knob too. This lets you     select your favorite squealy fuzz factory setting (doesn't the band love     that?) and then mess around with the STAB knob with your foot and create     little melodies and interference modulations with your guitar (doesn't the     band love that even more?).
 How does one get it to do something interesting?
   Well now. That's a fine question. Let's say you set the knobs (face them straight     on to do this) to vol=9 o'clock, gate=7 o'clock, comp=10 o'clock, drive=noon,     and stab=7 o'clock. By the way, to get the widest range for the probe control,     be sure to leave the stab knob on 7 o'clock. THE PROBE ADJUSTS THE STAB KNOB     FROM WHEREVER IT IS SET, UPWARDS TOWARD THE MOST CLOCKWISE POSITION AS YOU     GET CLOSER TO THE ANTENNA. It you set the stab knob more clockwise, say,     to select a favorite pitch to start from, the probe will let you raise that     pitch up to the top as you get closer. If you put the stab knob at the top,     at 5 o'clock, all the way up, the probe will do NOTHING. That's cause it     is made to adjust that knob from WHEREVER IT IS SET to the TOP, and if it     is already at the top, then no adjustment takes place.