Acoustic Piezo Preamp

Request for a simple opamp piezo preamp based on this circuit:
http://www.eleccircuit.com/acoustic-guitar-pickup-circuit-using-tl071

Bearfoot Emerald Green Distortion Machine

Today is Bearfoot day.  Info about the original

For the Vox lover in all of us, Bearfoot FX has created the Emerald Green Distortion Machine- a pedal which captures the chimey, crunchy essence of the AC series amps and provides a faithful simulation of the Vox tone through a variety of amps. Used through a Vox, this pedal acts as a booster driver to really push your amp into sonic heaven.  The EGDM Distortion and Voice controls are interactive and used together will take you from the low, clean tones of an AC all the way up to the screaming tone of a cranked Vox. The EGDM is extremely responsive to picking dynamics and your guitar’s volume knob.  

Bearfoot FX is the brainchild of Bjorn Juhl of BJF Design and Donner Rusk of Donnerbox. Every pedal is handpainted and no two are exactly alike. The pedals now ship with a plain, unpainted bottom plate to help ensure the most secure contact with adhesive Velcro for use on pedalboards. Bearfoot FX pedals are handmade in St. Louis, Missouri, USA. 

Bearfoot Candy Apple Fuzz Gold

There was a resistor missing from the schematic so the layout has now been fixed. If anyone has already built this then if you can add a 2K resistor somewhere between the germ transistor emitters and ground that should sort it out.  Or you can use then fix layout John did at the bottom of this page.  The main layout has been fixed with an extra column being added to accommodate the resistor

As usual with Bjorn designed stompboxes, a great sounding fuzz.  2N1308s should be available on eBay but if you can't find them, just throw any NPN germaniums in there.

Info about the original:
The Candy Apple Fuzz is one of Bjorns first BJFe circuits (along with the BBOD and DRD) ... it was made to cover the nastier side of vintage fuzzes and it does just that and more … over the years the one recurring request was to make it a bit smoother and more musically manageable ... when it came time for the BearFoot version he did just that by adding a treble control to reign in the rasp as needed… and he also adjusted the circuit to germanium transitors, which are smoother and more musical to most ears ... BUT silicon has its own musicality and many just like the full on unruliness and extra rip of silicon ... now you have a choice as we introduce the original silicon formula CAF ... Silver/Silicon ... Gold/Germanium

And the quick fix for anyone who built using the original layout, the resistor value should be 2K.

Frantone Vibutron

Great sounding tremolo here from Fran, and something for me to finally build with the batch of ICL8038 ICs I bought a couple of years ago! :o)  To keep the size down and make it 1590B friendly I've done away with the rotary switch used in the original, and instead I've used a DPDT on/on/on toggle to select the waveforms.  Functionally they remain identical and you will be able to select sine, triangle or square wave in exactly the same way, but remember to add the link noted.  I've also added an optional "Fast" switch which isn't in the original, but will do what it says on the tin and so some people may like the extra effect.  Thanks to KindaFuzzy on FSB for his schematic.

Info about the original:

Good Vibrations!
All of the warm, soothing tone you'd expect from a great vintage amp trem with the added versatility of selectable waveform.  Designed with the single coil player in mind, this variable amplitude modulator is a favorite among those that want the highest fidelity and smooth performance combined.  The Depth control allows you to dial in as much effect as you like, from the slightest hint of mellow sine wave smoothness to fully gated square wave effects.  The added benefit of a wide Speed range makes this a very powerful tool for the serious musician.  The Vibutron's lemon-lime motif is highlighted by the custom made cherry red Bakelite knobs.
Bon appetit!

Son of Screamer

OK we already have this here essentially with the Lovepedal Eternity, but this was a request and using the Eternity as a template meant it took 2 minutes to do.  This is Jack Orman's circuit which pre-dates the Eternity and so the design that Sean was "inspired" by.  Anyway I suppose it's nice to keep filling the library so we have everything,

Not verified in this guise, but it is really of course :o)

and an 18V charge pump version as requested