Prescription Electronics Experience

Here is the well known Prescription Electronics Experience, a Foxx Tone Machine with extra switchable Swell effect.

Octave & Swell Switches Diagram:

Zinky True Grit

Here is an overdrive pedal by Bruce Zinky, the creator of Smokey Amps.
Not great videos available at the moment.

Black Arts Toneworks Black Sheep

Taken from Black Arts website.

In all of it’s throwback glory, the Black Sheep. Dirty, mean spirited and a blast to hang around with. You can’t help but feeling a bit dirty when you plug in.

Essentially it's a modded BeeBaa with an input cap selector like you see on the Black Arts Black Forest. One thing I will say is that if you notice in the demo videos the fuzz knob is never turned up to the max, that's because it will start to feedback on itself like a mother.

Different transistors change tone of the effect. I messed around with different ones, and settled on MPSA18. They tamed a bit of the metallic decay that I heard with the 2N5089.

Switchable Onboard Power +9/+18V

Awhile ago I saw someone asking adding an +18V inverter to a board and the differences it made in some pedals, as well as what they need to do and worry about. Since there are more then a few people who have added an +18V inverter on a switch so they can switch between +9V and +18V, so I thought to myself, why not just whip up a quick layout to show how to do it for those that do not know.

Here's two that use an NE555 Chip

Here's two based on the 7660s/1044, based on the voltage doubler section of the madbean road rage voltage doubler section. schematic

Even though you can just run the +9V from the DC jack to SW1 and run that to the power in on the board, I don't like having multiple wires on a single lug of a switch so I made it so that you grab it form the board instead.

Colorsound Supa ToneBender

From kitrae

THE COLORSOUND SUPA TONEBENDER - By 1973 Sola was using the Colorsound brand on its pedals, now built in wider "jumbo" sized enclosures. The Tone Bender was upgraded and moved into this new enclosure. The Colorsound Supa Tonebender (pronounced Super) featured a new Silicon transistor circuit that had no relationship to the previous Germanium transistor Tone Bender circuit at all. This new circuit was essentially a knockoff of the Electro-Harmonix four-transistor Big Muff circuit, specifically a 1973 era Big Muff, now known as the violet Ram's Head. Sonically these sound very different to a typical Big Muff due to one minor change - the removal of the coupling caps and clipping diodes in the first clipping stage. This made for a very loud, in your face Big Muff sound. I have an early circuit board in my Supa that actually includes through holes in the first clipping stage for the missing cap and diodes, indicating Sola intended to originally make a straight clone of a violet Big Muff, or possibly had plans to do so later, but it does not appear any were made with the complete components. There is also an extra .1µF cap in the tone section and an extra capacitor added to the 9v for power filtering, not found on the original violet BMP circuits.

I'm sure you can use pretty much any common Si transistor in this one, so you don't really need to hunt down BC184's. Verified using 2N5088 transistors