555's in pedals are mostly used for switching situations that switch between two points or on and off, delay the time till turn-on/off, etc. Not in actual audio situations usually. For example, you could make an automatic killswitch with a 555. But hey, then you'd be stealing my idea! And yeah, I have actually made a schematic for it once but never bothered making it because it would have horrible noise issues.
Schecter Hellraiser Deluxe
Boss DS-1
Crate GTD65

GAS List:
Mesa Boogie Dual Rectifier Roadster
couldnt you make a pretty cool on off pedal with it
Faded Gibson SG Special - Black ice mod
Seymour Duncan SH-5 in bridge
B-52 AT 112
Ted Weber Mass100 attenuator
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EHX Metal Muff
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Wax Potting tutorial