cuz i just tried like 4 different ones, and none, including my own that worked until i tried to add an lfo to it seem to work.
surfing around, i found this:http://circuitworkshop.com/forum/index.php?topic=102.0
and realized everyone seemed to be wrong, i don't believe tim meant for there to be 2 500 k pots, just one...
my friend paul (insonicbloom) posted a layout that i believe is right, naz posted a schem in the aforementioned link i believe is right,
so here's my vero of it...i think i got it, it only uses three knobs total, not 4 like most of the layouts i've seen people try.
if someone could gander at it to see if i totally screwed it up, i'd wickedly appreciate it...i can't believe such a simple pedal can be messing me up so bad.
(http://img4.imageshack.us/img4/2553/pwm2schematic.jpg)
(http://i605.photobucket.com/albums/tt137/pinkjimiphoton/pongwarmachine1.gif)
thanks!!!!!!!!!!!!!!!!!