Caveats

Permission is granted to link to the schematics on
this page however I do not extend permission to place copies of the schematics
stored on this site on other sites. In other words, you can link, but don't
download and place them on your server and show them as
yours.

Before you go wild downloading these links and buying parts for the
schematics listed below, there are a few things you should know.

If you don't feel like reading yourself or helping
yourself, you shouldn't pursue building your own boxes. Read all the links
you can before asking questions.

Some schematics on the Internet have
mistakes. There is no way to know. I
got caught by one of these and it cost me a lot of time before I realized
that the schematic was incorrect. You can protect yourself from this by
purchasing a solderless breadboard (also known as prototype board). These
types of boards make it easy to prototype a circuit and see if it works and
how it sounds before you commit to putting it on a perfboard where changes
are not as easy to make. Unfortunately you still have to buy the parts to
prototype it even if it's a bad schematic :-(

Building a complete effect (with box, stomp switch)
costs money. The components are cheap but the box, stomp switch, pots,
are expensive. If possible, go mail order for these parts. In many cases you
may be paying MORE than if you had purchased the unit.

YOU WILL MAKE MISTAKES. Prepare to
take some time to debug your circuit. If you're the type that's patient and
can use this as a learning experience, great! If you don't like this sort of
thing, don't do it. Buy ready-made effects. Read R.G.
Keen's Effect FAQ for more caveats.

Your stompbox could sound different from
the original, especially if you don't use the recommended parts or
values. This is especially important when using certain types of transistors
such as FETs. Many times, even the brand and type matters, especially for
capacitors!

Just purchase some of
them, if you look at the schematic and it looks intensive, then
perhaps you should just buy the pedal. This goes for most delay type pedals
unless you have a PCB. Hand-wiring is just not appropriate for complex
circuits. There is a coolness factor that is the box and name alone. Another
reason is that some of these manufacturers are really cool guys and care
about their pedals. Many hand-made pedals are simply great and there is a
reason why they are so popular. If you value your time and really can't
afford to waste a lot of it, consider the reasonable prices of hand-made
pedals that are popular and selling. After you get past some of your mistakes
and buy a bunch of parts, $175 for a hand-wired pedal doesn't seem bad at all
:-)

I encourage you to purchase pedals in
production. If it's currently in production and you can afford it, buy
it.

Selected Stompbox
Schematics

Note that not all of these schematics are guaranteed to work. Some may
be completely wrong. A good place to ask about effects is Ampage
and alt.guitar.effects, a good newsgroup. I have added notes in red to the schematics believed to have errors.
Items confirmed by me or others have an OK!
in green. This is not meant to discourage you from trying the other schematics
out, just that I haven't heard anything about them.

In very general terms, I would say that probably every schematic on Jack
Orman's (AMZ) page is fine; Keen's
(GEO) page is excellent as well. Most of Justin
Philpott's Site is excellent (he has an effects feedback page), the one's
that have verified problems have corrections noted so pay attention to the
notes.

The schematics are listed by manufacturer or type or designer with the name
of the stompbox and the web site that it is located at. I encourage you to look
through these great websites and learn more from the excellent articles on
them.

About the files:

Most are .gif or .jpg and can be viewed right away. The files
with .pdf at the end need Adobe
Acrobat Reader. The files with .ps are Postscript files and need a
Postscript Viewer. The
files with .ps.Z are compressed (I forget the format... tar?) they need
to be uncompressed then viewed with the Posctscript
viewer. Stuffit
Expander should work on these files.

A/B SwitchBoxes

Dual Preamp and A/B
Box (Guitar Related
Circuits)

ADA

MP-1 (The
unoffical ADA MP-1 Preamp Website)

Ampeg

Scrambler PCB and Parts
layout. (Guitars, amps and
effects)

Arbiter

Fuzz Face (Guitar
Related Circuits) OK! Check out this article on Guitars, Amps and
Effects! Also a modified Fuzz
face from the same site. Check
out my common asked questions page for where you can get germanium
transistors for this pedal. Here
is an article on how to test those germaniums for use in the Fuzz Face
(GEO) Check out Oskar's
Fuzz Face Tour.

Read my Fuzz
Face notes regarding biasing and the 2N388A transistors.

For more mods to this circuit check out the Brit
Face. (Plate
to Plate)

Technology
of the Fuzz Face - (GEO) Excellent
article about the Fuzz Face.

Read
the Small Bear Electronics "5F" - FAQ For Fuzz Face Fanatics.

Fuzz Face 99 -
Check out this mutant. Updated 1/6/01

Octave-Face
(Stellan's
Schematics) - Great sounding octave distortion.

Trem Face -
finally unveiled.

Aron Nelson - Circuit-Ware -
not shareware, but something like it.

Lava Rim 2 - OK! The
Lava Rim revisited. I realized the original Lava Rim sounds better than the
Lava Rim+! Here are my changes after a year. I think it sounds great! Sound samples available.

Key points about the Lava Rim 2, uses cheap readily available 2N3904
transistors, sounds good and can get creamy - slightly compressed tones with
the drive and input pot set low as well as nasty heavier types of distortion.
It's also very easy to build and easily adapts to germanium NPN transistors;
the trimpots really allow you to dial in a very good tone.

11/29/99 - The Lava Rim 2 is a versatile circuit! You can
mix NPN germanium transistors and silicon transistors for a unique sound. The
trim pots let you use all types of transistors such as the 2N5088 for more
distortion and gain. In addition, the 2nd transistor can use a MOSFET like
the 2N7000 or BS170! Just pop in the MOSFET, drain toward V+, source toward
ground and adjust the trim pot until you hear good tone! In addition, remove
the diodes to really hear the MOSFET. Thanks to Jack Orman for the tip on
using a MOSFET for the 2nd transistor!

11/28/99 - to reduce some of the brightness of the pedal,
you may want to put a capacitor (.001uF -> .01uF in parallel with the
clipping diodes).

11/6/99 - revision 2 - added bounding pot to diodes for
more control over diode distortion.

Hornet
- OK! a germanium/silicon transistor hybrid
Fuzz Face that screams! High gain, high sustain, ANGRY, yet can get bluesy
when your guitar pot is turned down. Minimalistic design that can be "tuned"
to perfection. Better watch out cause the Hornet will sting The Rocket! Sound sample available.

The Hornet did not happen without the contributions of the usual
netizens that help us so often. Alfonso Hermida, GFR, Gus Smalley, Jack
Orman, R.G. and others. Thank you guys!

From Jack Orman:

Since the supply of 2N388A transistors have been depleted at Parts
Express, I thought I'd post a few alternate devices
that they carry that
can be used for F-F construction. Any of the below parts should be suitable
and are less than $1
each. The last one is spec-ed a little weak but
would likely be okay. The first one is a good sub for the 2N388A.

Part No. Type Hfe Price
2N1306 NPN 100 $ .95
2N1308 NPN 150 $
.75
2N1309 PNP 150 $ .75
2N1373 PNP 60 $ .95

The NTE101 is another choice:

http://www.nteinc.com/specs/100to199/NTE101.html

11/8/00 Small
Bear has a nice PNP version of the Hornet, check it out!

7/11/99 -

Notes: Not much to this circuit; the trimpots allow you to really tune in
and adjust the circuit. Please try the 2N388A transistors as they are dirt
cheap (18 cents when bought in lots of 5 or more I think). The 2N5088s can be
readily found through Mouser. The rest is pretty much Radio Shack or your
local store. Convert to PNP transistors by changing the orientation
of the lone 47uF electrolytic and reversing the battery polarity. (The
battery AND 47uF cap POSITIVE to ground).

Mods: The input cap is critical; for classic fat fuzz tones use 2.2uF to
10uF to larger! (you may consider socketing it - I did) The output cap is
less critical; I have found that .1uF is fine for me. The .05uF that I use I
have found to be very good because it changes the frequency response of my
guitar the least. I have around the same bass as when the unit is bypassed.
The trimpots allow you to really tune in the sound. Many shades of distortion
will come out as you fool around and turn them. C? is a high end rolloff cap,
you can put .001 to .01 to larger values and hear what it does (socket this
cap). You can also put the usual 50K pot at the input BEFORE the input cap as
described in the Technology
of the Fuzz Face - (GEO) Excellent
article about the Fuzz Face.

You could also make the 1K resistor off of Q2's collector a 47K, then
make the 100K trim a 47K and tap the output off of the junction between the
two. This will reduce your output level and make it a lot tamer.

Insanity
Box - OK! What can I say? I
think it's one of the best boxes I have built and one of the best
ultra-hi-gain pedals I have heard. Thanks to Jack Orman for his wonderous
circuit snippets, Frank Clarke for his work into CMOS circuits and all the
rest that helped out. What is the Insanity Box? Just the pedal that
delivers the high gain and sustain that I was looking for. I've been playing
it for a while and I still love it! Aggressive, distorted and sustained,
it's got all the right stuff. Watch the G3 video when you play through it!
With the
Insanity Box I start a new concept called Circuit-Ware. A variation on
shareware, I thought it up while playing a riff with the Insanity.
Sound sample available.

11/26/99 - Built another one and it works fine. I believe the previous
circuit I built on 11/10/96 had some type of bad voodoo in it. The schematic
works and is fine. I didn't need the bias pot for the 2nd one.

11/20/99 Revision 6 online. More cleaning up and fixed a mistake.

11/11/99 Revision 5a online. Jack cleaned up a few thing. Thanks!

11/10/99 Revision 5 online. Optional bias pot to stop gating effect of
CMOS if you have the gating problem when notes are decaying. You turn the pot
until the gating is gone, measure the values of the pot from wiper to lugs
and then put in fixed resistors. I have to point out that this is an advanced
project. I built another one and it seemed pretty hard to build. So many
things to keep track off. In addition, I had to put in the bias control - I
just put one bias pot and connected a 1Meg resistor from each inverter input
to the pot wiper. I ended with a 33K from 9V to the 1M resistors to inverter
inputs, then a 56K resistor to ground.

PCB
Layout, Press and peel
layout (TIF format) Thanks to John Catto!

11/5/99 Revision 4 online. The trim pot values are now listed. I measured
them in circuit , with power off.

11/3/99 Thanks to Jack Orman for pointing out errors and mods. The
revised schematic (revision 2) is now online.

Here is the
pinout of the CD4049 chip. Here's
more on the CD4049 from Jack Orman
and GFR.

The
Rocket, OK!a modification of
Gus Smalley's 3 Transistor Fuzz I came up with. Build the 3 Transistor
Fuzz and this one too! Screaming, smooth and rich. I call it the Rocket
because once you turn it on, you take off! Here's
a picture of the inside of The Rocket. Sample
of The Rocket in RealAudio format. Transistor collector voltages: 8.4,
1.957, 3.199

A PCB of The Rocket
is available from GEO!! For a very low cost, you can build this pedal! An
excellent beginner pedal to try! Listen
to The Rocket then get yourself a board and go for it!

9/6/99 - I just built The Rocket using GEO's
PCB. It was easy to create and gives very professional results. A couple
of mods as I played it through my Bassman and a 12" speaker:

Try substituting .047uF caps for both .01uF caps right after the buffer
in the front. You can't miss them, they are the only .01uF caps on the entire
board. In addition, I really mellowed out the pedal by putting a .2uF cap
(two .1uF caps in parallel) instead of the .1uF in the tone control. Remember
that if you use caps larger than .1uF instead of the .01uF caps, you will
have to increase the input cap value. Basically two .01uF caps will give you
a midrange heavy tone with some bass cut - nice and slicing. Anything more
will start giving you a smoother rounder tone and increase bass response.

Shaka Braddah -
OK! (pronounced Shock - Ah - Brah Dah)
Preliminary version. IC based distortion with FET booster at end. When the
drive knob is turned all the way down and level is up, you get a big boost.
Goes from a hint of distortion to flat out heavy gain. The diode combination
I chose produces a smooth nice distortion. I list a number of mods that you
can make to the box. Put it on a proto board and mod it till it does what
you want! Thanks to Jack Orman for helping with the design and the FET
booster on the end!

Read the
notes...

Shaka Braddah
Mods by Doug Hammond. Check out the notes
about the mods.

Shaka Express

A hi-gain pedal for the guys that want to rock!. The Shaka Express
represents the top of the line Shaka for hi-gain overdrive/distortion. The
mid "bite" control gives your distortion "teeth" and the 3 FET stages make
sure every nuance comes out loud and clear. Step on this pedal and take the
lead. PCB and
Layout available from GEO. Listen
to a sample of the Shaka Express from sounds.ampage.org. JPEG
available for people that are PDF challenged :-)

Shaka
HV This one is for the guys that
like more clean headroom and very little to medium overdrive. When the drive
is turned all the way down, you can a great good clean boost. Runs on 18
volts (2 batteries) and has much less drive than my usual pedals! Easy to
build and sounds good. HV = higher voltage. If you run it on 30 volts, then
change the drive pot to a 500K.

The goal of the Shaka Braddah line is to make a pedal that can have
tremendous boost into an amp while preserving the tone of your equipment. The
circuit should go from soft clipping all the way to heavy overdrive. I
believe the Shaka Braddah III achieves this goal.

Shaka
Braddah III - OK! A new version
of the Shaka Braddah (based on a circuit by Jack Orman) that
sounds very good. Creamy and smooth with some bite at lower drive settings.
Smooth and warm at high drive settings with the FET booster smoothing out the
diodes. Check it out! Sound
sample available. Blake has another sound
sample of his modded SB3.

The Shaka Braddah III was designed for you to be able to set the tone
control (around 8-9 o'clock) to a neutral setting and get a
booster/distortion that can make your guitar sound hotter and more vibrant.
In addition, when the drive settings are turned up, it should sound like your
amp is being cranked up.

Thanks to John Greene for the idea of using MOSFETs as diodes.

PCB Available for the
Shaka Braddah III from GEO

Note that the parts placement .pdf file incorrectly
lists a TL074 for the TL072 IC and a 0.047 instead of .004 capacitor.

Mods to try: 3 or more 1N34a diodes in series on each side of the
clipping section. Each diode that you add will raise the clipping threshold
and basically allow the Minibooster circuit to distort more before the
clipping diodes start adding their sound. What this means is that you will
hear more of the FETs before the diodes kick in. In a similar vein, I suppose
that you could try 1N914 and 1N4148 diodes for their harsher sound and put
then into the circuit. Since I socketed my clipping section, this will be
easy for me to try soon. I have tried different ICs (RC4558 and LF353) and
although the LF353 sounded different, I still like the sound of the TL072
fine. Try adding the "softness" or clipping threshold control noted in my
Simple Mods page.

8/20/00 - Revised drawing. Fixed tone control, removed 100K trim etc....

12/9/99 - Please try different op amps in the Shaka 3 circuit. They make
a rather large difference and one that you can fool around with is the
TS272CN (part number 511-TS272CN from Mouser). At 72 cents it's a cheap, fun
mod. It radically changes the sound of the pedal. The pedal becomes more
midrange, distortion is radically different. More sustain at the expense of
fidelity. Very interesting.

12/5/99 - If you like highs like I do, remove the 100K trimmer before the
Minibooster and change the 10K trimmer on the source of the Minibooster to a
4.7K - that's enough of a trimmer to reduce gain on the Minibooster circuit.
The 100K trimmer loads down the circuit and reduces highs a bit.

8/21/99 - There was an omission in the original
schematic - my original Shaka III's MiniBooster is also a treble
booster. The new schematic reflects this change. With this simple change (1
cap), your Shaka III will be clearer, brighter and punchier. On R.G.'s
board (which all of you should purchase), here
is the capacitor you should change.

7/4/99 - current consumption is ~5 mA, not bad.

5/18/99 - Try different tone circuits with the Shaka III. Splice
different types of tone circuits after the MiniBooster. Try the RAT tone
control and others. I think you will find that the Shaka III circuit is
extremely versatile and adapts to different tone controls. The pedal sounds
very different when used with different tone circuits.

5/9/99 - Notice that my Shaka III doesn't have the 22K resistor going to
ground in the tone control section. This probably explains why my pedal
doesn't get the scooped mids if this 22K resistor is there.

4/18/99 - Wired 2 IRF520s as MOSFET diodes with a 1N34a diode attached to
the source pin. This arrangement sounds extremely natural to me. Wire 2 of
these and reverse them in polarity when attaching them to a circuit just like
a diode pair.

Diode is 1N34A, MOSFET is IRF510 or IRF520.
Make 2 of these and then use them as diodes in the Shaka III.

4/15/99 - Added a trimpot on the schematic which essentially allows you
to control the amount of "clean boost" when the drive is turned all the way
down. This trimpot allows you to make your "clean boost" really clean or
kinda dirty - you know?

4/11/99 - Tried 4 1N34a diodes on each side for a total of 8 diodes! The
diode array tested at ~.822. Very nice... Even more nice dynamics, yet still
has a smooth sound. I'm going to try some 1N914 and 1N4148 combinations for
asymmetrical and other varieties of distortion. I realized I am able to mount
the diodes onto sockets essentially creating a clipping "module". I can plug
these modules in anytime for different sounds.

Check out Doug
Hammond's Shaka Braddah III mods which he calls the Shaka Braddah IV. I
did like the sound of his mods. I find that the Rat circuit seems to produce
less highs and this may work for amps which are bright.

Booster
2.5 OK!
The Booster
2.5 is the next generation of the Booster 2 designed by Jack
Orman. I refined the circuit based on the refinements Jack put in his
Mini-Tiubes pedal. The result is a stunning overdrive that has 90% of the
wonderful tone of the Mini-Tubes with about 1/3 of the complexity. A great
pedal, I am still enjoying mine. Also check out the Sweet
Thing, which is the Booster 2.5+Doug
Hammond's mods. Another excellent variation; this one is on my pedal
board. Coming soon: Boost switch, modified tone
control.... possibly more... Sound sample available.

Hot
Fuzz - My take on the Colorsound Tone Bender Professional
Mark II with the Sweet Thing tone control. I'm still working on this
one, so stay tuned. BTW: the "T" next to the pots mean use a trimmer. Sound sample available.

Apollo

Treble and Bass
Booster

Attenuators

Power Soak
Unit for Low Wattage Amps 25 watts max. (The
Blue Guitar)

8 ohm
Volume Reducer and Line Out Box (The Blue Guitar)

Reactive
Load (Plate
to Plate)

Bell

Flanger Part
1 and Part 2

Bespeco

Sweeper
(Hemmo's Site)

Blackbox DIY

Dynamic Treble
Booster

Bixonic

Expandora?
see the hand drawn
schematic

Expandora -
donated by Patrik Erikson, check out the parts
list. I would purchase this
pedal.

Boss
I would purchase all Boss pedals
because most of them are very complicated and they are reasonably priced.

BF-2
Flanger (Justin Philpott's
Site)

Blues Driver
part1, part 2
- donated by Patrik Erikson. This pedal was used by Larry Carlton.

CE-1
(Justin
Philpott's Site)

CE-2
Thanks Chris!

CE-2B
Thanks Chris!

Chorus/Vibrato- (Guitar
Tube Amps)

DS-1
(Guitarage)

DS-2 -
(Guitar Tube Amps)

Flanger-
(Guitar Tube
Amps)

GE7
EQ (Effectronics)

Hyper
Fuzz (Hemmo's Site)

Metal Zone (MT-2)
part 1, part 2
- donated by Patrik Erikson. Here's another schematic (zipped) - different??
Here
is an incredible DIY layout. Amazing what you can do as a DIY project.
Thanks gty vbt!!!

OD-1 (Rob Strand's Homepage)

OC2 -
donated by Bernard Busser

Slow Gear Attack
Delay (Guitar Related
Circuits)

Super
Overdrive (Plate to Plate)

SD-1 (GM Arts)

TM-3
Speaker Simulator1 and 2
(Stellan's
Schematics)

Touch-Wah
Wow. Tons of components in this one!

Carlin

Compressor
(Stellan's
Schematics)

Phasor
(Stellan's
Schematics)

Colorsound (Sola Sound)

Fuzz
(Stellan's
Schematics)

Overdriver -
OK! I like this pedal! Initially designed to do
clean boost. Boy does it BOOST! To control the gain and make it more like a
distortion pedal, put a 10K or 100K volume pot at the end of the circuit,
that way you now have a drive and volume pot arrangement.

Jumbo Tone
Bender - OK! Verified 8/9/98. Sounds
initially like a transistorized Sonic 9 distortion (or rather the Sonic 9 is
the IC version of this). Has a Big Muff/Sonic 9 single tone pot which goes
from nasty slicing highs to full and round. Lots of gain. An interesting
sound, It seems like I can still hear the original guitar sound in the output
like it was mixed in.

WaitAMinute! Look at the Big
Muff schematic... Now look at the Jumbo
Tone Bender... anything familiar?

Original Tone
Bender -(GEO)

Notes from John Catto:

Today a friend of mine gave me a (not working - broken
footswitch/one pot) Sola Sound Tone Bender. This is the three knob version
built by many people on this board, including myself. There have always been
some doubts about the schematic and now was my opportunity to clear this up
once and for all!
The schematics posted by RG are pretty close, the only
differences are..
1. ALL pots are 100k not 250k and no 2Mg (it appears
the Yardbox is a closer clone than thought)
2. The resister from Q2 to
earth is 3.3K not 33k
3. The capacitor that parallels the 3.3k resistor
is 10uf on my unit not 22uf
4. On my unit there is a 220k resistor
between the centre lug of the tone pot and the volume.

The Transistors are all unmarked metal can, no doubt
Germanium. The can has a narrow ridge around it about a sixth of the way
up.

One more thing, I've always believed that this design is
the original design predating the more fuzzface like models with 2 knobs.
This one however is dated inside 21 March 1974, so perhaps it is a later
design after all or at least was still made that late. The case is a very
slightly shallower version of the colorsound box, with silver paint and
orange/black text.
Well there it is. I never thought I'd see one of
these in the "flesh"

PCB
Layout and more on Guitars,
Amps and Effects. OK!

Tone Bender Professional Mark II.

Check out the various Bender
variations.

Mark Poley contributed his version
with tone control! Check it out!

SupaSustain -
supposed to be very good!

Coron

Distortion 10
- MXR knock-off. Thanks to Chris Winsemius.

Craig Anderton

Octave-Doubling
Fuzz (Justin
Philpott's Site)

Tremolo
(Justin
Philpott's Site)

Tube
Sound Fuzz (Justin Philpott's
Site)

Mark Hammer's mods on
the Tube Sound Fuzz (GEO)

and now Stellan's
mods on Mark Hammer's mods! Read the notes.

Dale VanZile

Suppa Tone
Mangler HIGH res
version. Mid Filter and more on this modified Suppa Fuzz.

Dallas

Rangemaster -
OK!

11-27-98 - Check out R.G. Keen's GEO
page for a very nice explanation of the Dallas Rangemaster and how to build
your own!

Dan Armstrong

Blue Clipper (Guitar Related Circuits)
This schematic believed to have errors. Dan
Armstrong said that MXR copied this circuit to make their Distortion+. He
said they copied it line for line and added a tone control. Last I knew, the
Distortion+ does not have a tone control.

Note: Jack Orman points out
"the resistor from the inverting input to the 47uF cap is way too big: it
should be 2k4 or even 240 ohms."

Green Ringer (GEO)The unmarked transistor is marked in
my Green Ringer. It's a Motorola MSD6150.

Green Ringer (Guitar Related Circuits)
This schematic believed to have errors Check out
Hemmo's 21st
Century Green Ringer.

Orange Squeezer
(GEO) I have this compressor and it
is great. Lee Ritenour, Jeff "Skunk" Baxter and others used this little
"plug-in-the-jack" compressor with an on and off switch. I still use mine now
and then when I want the "classic sound".

Doug Hammond

Acme
Thrust-o-matic Vox Top Boost anyone???

Bobtavia A modified Bob Starr Octavia. Jeff Musser made a cool
parts layout.

Boosters Galore! Check
out Doug's boosters for kicking your input into hyperdrive!

ElectaBurner Doug designed this to boost the front
end of his modified Electar amp. Perhaps it would work with your amp too! PCB here.

Pentode Driver with
tubes.

Shaka Braddah 4 OK!

This contribution from Doug Hammond is an extension of the ShakaBraddah
III which refines various points of the original design. Doug has worked a
while on this design and it promises to be very good. All the good attributes
of the Shaka Braddah III have been retained with improvements.Here is the PCB.

Shaka BBQ OK!

Some like it HOT and this pedal is built for sizzling leads. Another
contribution from Doug Hammond. A Shaka with attitude+! PCB.

Sweet Thing, OK!which
is the Booster
2.5+Doug
Hammond's mods. Doug added a cool tone control that adjusts the mids and
slightly rolls off the highs. Very nice! BTW: I made R11 100K instead of
2.2Meg.(original schematic) There is not enough level with a 2.2M
resistor in there; the unbypassed signal can be louder than the pedal. I
found 100K to be perfect for me. Sound
sample available. PCB Here

Sweet
Thing with tone control mod. Even easier to build and Doug
says it sounds great! Less parts too! PCB
here.

33 Volt Sweet Thing More
headroom, better feel, check it out!

DOD

DOD
Phasor 201 (Justin Philpott's
Site)

Compressor 280A (Guitar Related Circuits)

FX53 Classic
Tube - Thanks to Regent!

FX69 Grunge
- Thanks to Regent!

FX75 Flanger (Guitar Related Circuits)

Overdrive 250 (Guitar Related Circuits)
OK! Very close in design to the MXR Distortion+.

Compressor/Limiter 525
(AMZ)

Wah/Filter 545 (AMZ)

Chorus 565 (AMZ)

Analog Delay 585 (AMZ)

Phasor 595 (AMZ)

Compressor 825 (AMZ)

Ed Guidry

Blues
Booster -  sounds great!

BSIAB
(Brown Sound In A Box) Fantastic
sounding variation of the Booster 2.5/Sweet Thing!

EMM

Shaper This
looks cool!

EQ Circuits

4bandeq.ps.Z (Guitar Related Circuits)

Signal Brightener
(Guitar Related
Circuits)

10 Band EQ (Guitar Related Circuits)

Tone Booster (Guitar Related Circuits)

Tone Control
Circuits (Guitar
Related Circuits)

StudioMaster
EQ (Stellan's
Schematics)

Electro-Harmonix

The EH Man's site is THE place for EH info. Check
out the COOL articles.

Attack
Decay

Blum is asking for help on this:

The biggest problems for me are :

- MN 3007, 4047,4066 and 4013 pins
- LM 311 out (I suppose it`s LM
311?) If you have ideas, please post on the forum.

Axis - same as
Guild 2 knob Foxey lady!

Badstone
Thanks Steve Giles!

Bass Balls (Clone
Wars) Check out Marjan
Systems and the Fuzzy
Balls Envelope Filter.

Big
Muff Op-amp version (Justin
Philpott's Site)

Big Muff (Transistor) (Guitar Related Circuits)
OK! I used 1N914
Silicon and 1N34 Germanium diodes in parallel with high gain 2N5088
transistors in my Big Muff. This schematic probably missing 100K resistor
from base to ground on the 3rd transistor stage. The 3rd stage should be
identical the previous stage I believe. Layout
Here (Clone Wars).

Big
Buzz Mod for Big Muff (Barfing
Tomato's) Mod for more sustain and buzz. Check out the Muffler
from John G.

Big
Muff PNP version. (Stellan's
Schematics) I haven't seen this version before.

Triangle
version Big Muff. A modified R.G. (Geofex) schematic of a Triangle
era-Big Muff.

Possible mods and notes: You can try NTE123AP, which is pretty much
2N2222 transistors. Try lower hFE transistors - like 150-250 instead of the
usual 400+. Ed Rembold suggests Q1 base to ground 47K.

Deluxe
Octave Multiplexer A and B

Doctor
Q - hard to read. I do not recommend this circuit.
About 30% of people have gotten it to work but I think it's problematic and
irritating, try the Dr. Quack instead.

Doctor Q
(Tom's
Synth Cookbook) I do not recommend this circuit.
About 30% of people have gotten it to work but I think it's problematic and
irritating. try the Dr. Quack instead.

Deluxe
Memory Man (Stellan's
Schematics) I used to own this until my friend left it out in the rain.
:-( It was my favorite delay/chorus.

Simple Deluxe
Memory Man reissue mods that can be done. OK!

Electric
Mistress (Stellan's
Schematics)

Electric
Mistress-like Flanger (Tom's
Synth Cookbook)

Electric
Mistress Flanger Thanks Steve Giles! Also check
out his bounce mod.

Electric
Mistress Model 2 (Hemmo's
Site)

Electric
Mistress Model 3 (Hemmo's
Site)

Graphic
EQ Thanks to Brad Fajardo!

Graphic EQ (GEO)

LBP and other
Boosters (Guitar
Related Circuits) I used to buy these LPB-1 boosters all the time. They
were so useful for driving different things. Make one in about 10 minutes.

Little Big Muff (Guitar Related Circuits)

Little Big Muff
- I remember having one of these. I wonder where it went? Really nice
schematic by Tobias!

Memory
Man (Stellan's
Schematics)

Economy
Memory Man-like delay (Tom's
Synth Cookbook)

Muff Fuzz (Guitar Related Circuits)

Pulsar (Clone Wars) The
Pulsar has arrived! in PDF format.

Slapback
Echo (CJLectronics)

Small Clone (The Great PCB)

Small Stone (Guitar Related Circuits)
This schematic believed to have errors, read below.
A classic. I still have mine.

Notes: According to Jack
Orman, "Pin 2 is marked as the non-inverting input when it is actually
the inverting input.... it's marked this way consistently on the schematic.
You have to feedback from the output to the inverting input (except for a
Schmitt trigger). I verified this in the RCA data sheet for the CA3094 - pin
2 is inverting and pin 3 is non-inverting"

Small
Stone-like Phase Shifter (Tom's
Synth Cookbook)

Soul Preacher (Guitar Related Circuits)
I never really liked this thing. Mine had a problem where it would
amplify all the noise and then clamp down when I picked a note. While it
clamped, it took about 3 to 4 seconds to recover.

Space Drum
- I still have one of these somewhere! Prototype1,
Prototype2
Thanks Steve Giles!

Zipper
(Stellan's
Schematics)

Elektor

Compressor
and text- (Guitar
Tube Amps)

Distortion- (Guitar
Tube Amps)

Distortion+Compressor- (Guitar
Tube Amps)

Harmonic
Enhancer-
(Guitar Tube Amps)

Harmonic
Enhancer version 2
- (Guitar Tube
Amps)

Variable
Fuzz - this looks very interesting.

ETI

183 Value Distortion Pedal (Guitarage)

184 FET Distortion (Guitarage)
Does this look familiar? :-)

184 Blue Suede Fuzz (Guitarage)
Intesting distorter.

Eventide

Andertide
Phasor

Fender

Fender Blender (Guitar Related Circuits)

Blender (GEO)-Wild sucker. Some octaving, but
mainly "destroy the sound "distortion.

Frank Clarke - Frank
has some nice modifications for existing circuits and nice new pedals. A very
nice site!

Blues
Breaker mods

Clean
Face "Beam me up!"

Fet Muff
Plus - A modification to Jack Orman's Fet Muff

Hot
Harmonics - OK! Very nice sounding
CD4049-based pedal. With a passive tone control after the circuit, this thing
is great!

MOS Clean
Power Booster.

Rangemaster
notes

Screamtendo
64 - Frank's souped up version of the Tube Screamer.

Stack-in-the-box
high gain mods

Foxx

Foxx
Tone Machine (Justin Philpott's
Site) OK! Nice smooth distortion. Gets raspy
when octave is switched in. Not a bad octave sound, works over more of the
fretboard than the Tycobrahe. However I think that the Tycobrahe has more
ring modulator type sounds and is clearer for octaves on the high notes. I
put the lowest gain 2N5088 transistors I could measure. However I did put in
transistor sockets in this one. I will later put in the transistors specified
in the schematic.

Foxx Tone Machine
(GEO) OK!

GCS/Gus Smalley The following are circuits that are variants of existing
circuits but with hand-picked substitution values/parts by Gus Smalley. Please
try these...

Another Sick Fuzz
This looks easy to build!

BJTBoost -
Booster circuit using Si transistors.

3 Transistor
Fuzz OK! Build this cool variation of a
Fuzz Face, it's great! Check out Guilherme's extension of the 3 transistor
fuzz. Schematic
and Layout
and notes.

GCS Fuzz
F. OK!

GCS JH2 Fuzz
Mod.

GCS
Overdrive OK!

GCS
Ritefuzz

GCS MFUZZ - A
modified Muff Fuzz. Sample of the MFUZZ in
RealAudio format. OK!

Gus recommends an LF353 for the dual op amp. "The circled
options are to make it

sound more like a Big Muff high and low end rolloffs".
"When

you disconnect the feedback pot and leave just the 1n4148
diodes it goes

into what I call sick mode Think Edges U2 broken fuzz
sound on POP tracks 1 and 2.

It also sounds very good in the loop of a lovetone
meatball effect". "I use

100k audio pot on the output of effects because of the
way the drive of

the IC and the pot interact with the 1st tube in a tube
amp it has a

small tone effect".

My notes: I think this is an easy-to-build single IC chip
distortion/fuzz. Experiment with the diodes (try LEDs, germanium diodes
et...). Adjust the input and output caps to your liking.

MBB Fuzz based
on Bee Baa Fuzztone. Looks like it might be good for bass too.

MOSFET
Overdrive - hmmm.... looks cool, I will have to try this one.

NPN Boost
- Gus' answer to the myriad boosters out there. Si too!

NPN-Drive -
check it out!

Octave Up Sick
Box A wild and crazy octave up sick box. Mine worked a little, but I
think there might be some problems with this circuit.

Simple Fuzz -
simple and fun.

Simple Octave
Up - uses a transformer.

Gretsch

Control
Fuzz

Howie's Effects

Howie's Metal
Simplex - Howie's metal pedal - a very simple design. Check it out!

Howie's Effects
Switcher - looks very useful.

Hemmo P. Another
cool effects designer from our forum! His site is killer!

Blue
Flipper - a mod to the Blue Clipper.

FuzzaH

21st Century Green
Ringer

Birthday Fuzz

Chunky Device

DOD Overdrive/Preamp 250
- another version?

Ibanez Black Noise

Endless Overdiveness
Nameless

Boosters

Iggy's Groove Guitar FX
Webpage Lots of stuff here! The schematics have sound samples too!

Auto-Wah

Digital Distortion

Digital Distortion II

Digital Overdrive

Dirty Blues Overdrive I

Easy Phaser

Easy Phaser II

FuzzBox #1

Jazzy Blue Tone

Twin-T Wah

Twin-T Wah2

Opto-Compressor

Reverse Envelope

Metal Overdrive 1

Ibanez/Maxxon

AD100 Analog
Delay Nice drawing!

Black
Noise - Thanks Hemmo P.!

Fat
Cat (Stellan's
Schematics)

FZ-5 - (Jeff's
Guitar Effects) Pretty much a Big Muff clone.

MS-10
- Metal Charger. Thanks to rph! (Regent?)

MT-10 -
Mostortion.

Overdrive II
(OD-2) - donated by Patrik Erikson.

PL-5 Power
Lead. Guitar
Related Schematics.

Sonic
Distortion (AMZ) OK!
Lots of distortion, from semi-clean to very distorted. Cool tone knob. I used
an RC4558 in place of the TL072 here. This pedal is good for heavier
distortion settings. Imagine RAT and Big Muff thrown together.

Thrashmetal
(Competitive
Assesment Report) Complete Analysis of this pedal.

Thrashmetal.
Guitar Related
Schematics.

Super Tube
Screamer - Someone was selling these for $1000 each.

Super
Tube Screamer (Effectronics)

Tube
Screamers (GEO) - Check out The
technology of the Tube Screamer. . Also check out the Ibanez
Tube Screamer Hotrod Page. TS-10
to TS-808 conversions and Frank
Clarke's Screamtendo 64 mod
for the TS. Check out Dan's Rudescreamer!

Check out Pauley's
Opamp Screamer. (Pauley's Effect
Palace) Hand
drawn layout (gty vbt)

Check out Bill
Bergman's nice TS layout (TIFF file).

What is the Tubo Tube Screamer?

From Dai Hirokawa:

"TS9"(Normal) mode(for comparison): .047uF mylar w/two
small signal Si diodes
"+" mode: 0.22uF polarized electrolytic w/four
small signal Si diodes--two for the top of the waveform, two for bottom
(these look the same as the ones used for the normal setting)
"Hot" mode:
1uF polarized electrolytic w/pair of LEDs(w/a 470k in parallel w/the
LEDs)
"Turbo" mode: 2.2uF polarized electrolytic w/no diodes(seemed odd
but it does look open)
-the 4.7k and 51k are unchanged for all
modes

TS-5 - Thanks
George Ong!

TS-10
(Justin
Philpott's Site)

TS9 Creamer
(Killer Tone
Electronics) - Check out this variation of the Tube Screamer.
Interesting.

Tube
Screamer Mod details. (Dr.
Daktari GuitarPedal Collection)

Interfax

Harmonic
Percolator
- OK! Thanks to Alfonso Hermida!! Updated
7/10/01

Jack Orman /AMZ

Order Jack's CD for all of
his cool projects. Lots of the coolest pedals have been created with
snippets and circuits of Jack Orman's work. Check out his creations!

Check out his forum.

Muff Boost

MOS-Face

Tube Type
Distortion. Hmmm Crate type distortion.

Jay Doyle

FET
Punch - The FET punch uses readily available parts to create a
versatile overdrive.

Shaka
Smooth - A smooth addition to the Shaka Line! PDF file.

Joe Davisson Joe is on a roll and
is devising new pedals for us to try!

Amber Boost

CCS-Drive

Easy Drive
Used to be called the Simple Overdrive. Distortionfreak provides this
sample of the Simple Overdrive version 2.

Inverter
Distortion - interesting!

Nexion

Obsidian -
Killer overdrive pedal.

Obsidian 2HV

Tweak-O

Joe Gagan - Watch for this guy!

Brontoboost

Dinosaur
Fuzz

Easyripper
- w/expresssion
interface loop

Nitroburner

Skyripper
Fuzz - soon to be famous FUZZ! Ridiculous sounds, wild, wacky, THD to da
max, maybe the ultimate fuzz?

John Greene

Fullclone
- (Justin
Philpott's Site) TS series style distortion.

Screamer+
- Tube Screamer variation. Known to sound real good. Layout
here (Clone Wars)

Fuzz -
Axis Fuzz variation with MOSFET and tone control.

John Hollis - Cool Website
too!

EasyVibe

Zombie Chorus

Crash Sync I
have always wanted this....

OmniDrive - no
more pedals after this? :-)

Titan Boost and
Titan Octave

Phantom Wah

Jordan

Bosstone
OK! I believe this is the correct circuit.
Lotsa FUZZ. This circuit is not very touch sensitive. More of an in your face
type of fuzz. This thing has so much output. With my amp turned OFF and the
output all the way up, you can easily play this thing

PCB Layout
and more... on Guitars, Amps and
Effects.

Bosstone -
original schematic This schematic believed to have
errors.

Bosstone (Guitar
Related Circuits) This schematic believed to have
errors.

Bosstone - (GEO)

Kay

Fuzztone Model
F-1 Thanks to Rob Urias for this one.

KOD

NG-04
Distortion Plus -
(Guitar Tube Amps)

Korg

Octave

Parametric
EQ

Phasor

Phasor- (Guitar
Tube Amps)

Tone
Booster

KrustyKorp

Interlarder - wild
fuzz and more.

Maestro

Boomerang (Guitar Related Circuits)

Brass-Master
BB-1 (Justin
Philpott's Site)

MFZ Fuzz

Ring
Modulator (Justin Philpott's
Site)

Fuzz (Guitar
Related Circuits)

Fuzz-Tonecourtesy
Brad Fajardo. An alternate
implementation uses 2N508s Ge transistors and a 9 volt battery.

Maestro
G2 Rhythm N' Sound (Effectronics)
Text
for the pedal.

USS-1A
Universal Synthesizer System - ZIP FILE Thanks Peter! If anyone
can make this with perfboard, you deserve a medal!

Marshall

Blues Breaker -
Thanks to Gus Smalley! OK!

Blues
Breaker-
(Guitar Tube Amps)

Blues
Breaker

Blues
Breaker(GM Arts)

Drive Master
1992 (GM Arts)

Guv'nor
-
(Guitar Tube Amps)
Hand
drawn layout (gty vbt).

MS-2 AMP

Shred Master
(GM Arts) Hand
drawn layout (Bill Petris)
- Well, you've heard about the Shredmaster - but how about the
DREADMASTER!!!! Dreadmaster part 1
,Dreadmaster part
2, Dreadmaster
Docs from Bill Petris!

Speaker
Simulator from Marshall Amps - OK! Thanks
Ed! Very good Marshall type speaker simulator! Tons of bass and the highs
give this cabinet simulator an agressive sound. A nice mod for this circuit
is to replace the first 47K resistor from the inverting in to out on the
first op amp with a 250K pot or trimmer. This allows you to set the gain of
the entire circuit.

Morley

Power/Wah/Boost

Pro Fuzz
(Stellan's
Schematics)

Pro Phaser

Mosrite

Fuzz-Rite (Guitar Related Circuits)
Hey, they resissued this! Anyone got one? I saw one in the local store for
$150!!! Maybe less than $4 worth of parts on the board.

Mutron

Mutron
III (CJLectronics)
OK!

Phase
45 (Justin
Philpott's Site)

MXR

Bluebox
(CJLectronics)
OK!

Dynacomp(GEO)

Dynacomp (AMZ) OK!
Compressor.

You can order boards for the above. Prices for boards are $10.00 each,
including parts placement,and schematic.All anybody has to do is to send a
self addressed, stamped envelope stating quantity to: Robert Shumway

41 Highmanor Drive

Henrietta, N.Y.14467
Send money order,and Robert will send out in mail
the same day he receives orders. Apparently he has 1800 Dyna-Comp boards

Distortion+
- OK! Corrected Schematic. Corrections courtesy
of Jack Orman.

Distortion+ (Guitar Related Circuits)
This schematic believed to have a error.

Note: The input jack in the schematic is wired incorrectly. The
connections to the input jack should be swapped between the 9V and ground.
See the negative terminal of the battery should go to the middle connectore,
not the tip as noted in the schematic. Thanks to Jack
Orman for pointing this out.

6/7/99 - NEW MOD!
from Alfonso Hermida. I haven't tried it yet but I will!

Distortion+
(GM Arts)

Distortion II
with component layout
sheet and parts list as
far as I can read from the schematic. Component sheet updated 8/18/98

Envelope Filter
- w/mods! (Mark Hammer, Steve Giles, Ambrose Chapel)

Flanger
(Stellan's
Schematics)

Headphone
Amplifier - Thanks Alfonso!

Hot Tubes (Guitar Related Circuits)

Micro
Amp Kinda famous preamp/booster. (CJLectronics)
OK!

Phase
45/DOD Phasor 201 (Justin
Philpott's Site)

Noise Gate (Robin Tomtlund's Site)

Phase 180 Plus
(GEO) - with extras.

Stereo
Chorus - (CJLectronics)
Thanks CJ!

Nobels
Electronics

A ton of schematics
on this page. Look at the bottom. If anything, it makes you want to buy
some of these pedals!

Modified Nobels
Distortion - from HOWIE

Oberheim

Ring
Modulator Trimmer
Docs

Phaser PS-1 (Guitar Related Circuits)

Pearl

Chorus
- (Guitar Tube Amps)

Compressor
- (Guitar Tube Amps)

Flanger- (Guitar
Tube Amps)

OD-5
- (Guitar Tube Amps)

Phaser
- (Guitar Tube Amps)

Prescription Electronic

The
Experience Pedal (Justin
Philpott's Site) Check out the PCB,
layout and much more at Guitars,
Amps and Effects.

Pro Co

The Rat - OK! (Swap site
for Guitar PCBs)

The Rat -
Corrected schematic. This schematic corrects errors in the original
schematic. Corrections courtesy of Jack
Orman.

The Rat (Guitar
Related Circuits) This schematic believed to have
errors.

The Rat type B (Guitar Related Circuits)
This schematic believed to have errors.

Tonda's Rat
Mods - custom mods to the Rat

Ranger

Para-Exciter (Analog Guitar and Bass Music
Effect Clones)

R.G. Keen Check
out his Guitar Effects FAQ! Oh man!

Auto
Mike Muter (GEO) Clever microphone
mute'r

A/B/Y Splitter
Transformer box.

A/B/Y Hum Free Box
2

Bypass box with
DPDT and LED indicator. (GEO)

FXBus
- killer idea!

Juggler

LERA (The
Leslie (tm) Effect Rotary Adaptor)(GEO)

Millenium
Bypass - OK! Fantastic, easy,
great circuit for true bypass and LED. I just built about 4 of them
for the future.

Millenium
2 Bypass

MOS Doubler (GEO)

Phase 180 plus
-(GEO) update of the Phase 90 by MXR

Programmable
FX Switcher (GEO) - This looks
quite clever.

Signal
Splitter -(GEO) This looks VERY
useful.

Spyder -
hum free power.

Volume pedal
conversion for wah pedals. (GEO)

Vintage
Voltage Adaptor (GEO) Now this looks
COOL!

Rod Elliot Tons of
interesting projects on his page.

Guitar Tremolo
Unit

Guitar Vibrato
Unit

Roger Mayer

Axis
Fuzz (Justin
Philpott's Site) Could have errors.

Axis Fuzz
correct - OK! Thanks to Tobias Karlsson!!!!
PCB Layout and
more on Guitars,
Amps and Effects.

I don't know.... A very fuzzy pedal. I guess it sounds
OK. If you like FUZZ, then you might like this, however, I think the Lava Rim
2 is much better. Anyway, Jimi liked it right?

Classic
Fuzz (Justin
Philpott's Site)

Octavia
(Justin
Philpott's Site) PCB
layout on Guitars, Amps and
Effects.

Octavia
(Barfing
Tomato's Site) Corrected and modified version.

Voodoo-1
(Justin
Philpott's Site)

Voodoo Vibe

Roland

Bee-Baa Fuzz
This is the fuzz used by Lee
Ritenour in the earlier years; I believe in the Feel The Night era.

Ross

Compressor

Sam Ash

Fuzz

Schaller

Wah Yoy-Yoy
Could have errors. 8/3/01 - (Jens) The 22nF
capacitor has to go to the base of the second BC239C, not the collector!

Seamoon

Funk Machine

Scott Swartz

Alternate FET-Booster-Type Circuits

Circuit1,
Circuit2

Output Stage
done with FETs

Octave
Screamer (GEO) OK!Tube Screamer meets Octavia. Hmmm. I just happen to
have an extra transfomer lying around. Sound
sample from sounds.ampage.org.

Steve
Daniels

The
Bear Face - Small
Bear Electronics LLC - OK! A really great
Fuzz Face derivative. One of the only Fuzz Face clones my picky friend loved.
I was lucky enought to try a protoype and it was great! Build it and buy the
parts or a complete pedal from Small Bear. It's worth it!

Tremulous
Bear

The
Wild Mouse - Small Bear Electronics LLC - OK!Nice tone boost circuit. Nice site!

Steve Giles

HE Auto-Wah
PDF document.

Wildcat
Sweep - Envelope Follower

TC Electronics

TC Chorus
part 1 and 2
(Hemmo's Site)

Tokai

TDL-1 Analog
Delay

Tycobrahe

Octavia
(Justin
Philpott's Site) OK! Cool octave on higher
notes. Ring modulation and severe distortion! Mean distortion pedal! I love
this thing through my JD-10. I used Mouser's 42TM022 transformer. Tke note
that the Primary of the Transformer is faced towards the output jack. For the
MPS-A18, I used the NTE equivalent. Watch for the reversed power supply.

Octavia (GEO)
OK!

Univox

Micro-Fazer
- apparently has LFO problem and is hard to read. From Steve Giles!

Unidrive
(Hemo's Site)

Super-Fuzz
(Justin
Philpott's Site)

Super Fuzz (GEO) OK!

Vintage Technology

Orange
Sunshine - OK!A silicon transistor fuzz face
clone. Probably any high gain silicon transistor can be used. Not at all
subtle.

Voodoo Labs

Overdrive
(Justin
Philpott's Site) OK! 70's sounding pedal.
Kind of dark but oddly bright on the extreme drive settings.

Gilles Caron, has a schematic,
layout, and
PCB files - bottom and top.

Vox

Chorus
Pedal model 1905 - 1981 (VOX
Downloads)

Compressor
Pedal model 1903 - 1981 (VOX
Downloads)

Distortion
Pedal model 1901 - 1981
(VOX
Downloads)

Flange
Pedal model 1902 - 1981
(VOX
Downloads)

Phase
Pedal model 1900 - 1981
(VOX
Downloads)

Suppa Tone
Bender (Analog Music
Effects DIY) Hand drawn PCB layout.

Suppa Tone
Bender (Robin
Tomtlund's Site)

Tone Bender
V829

Wah Pedal
model 1904 - 1981
(VOX
Downloads)

Wah-Wah
Pedal - 1980
(VOX
Downloads)

Wah-Wah
Pedal - 1993
V847?(VOX
Downloads)

V847 Mods. (Guitars, amps and
effects)

Wasi Raza

Jam Machine - check out the notes on
it.

Wah Wah

Crybaby
(Justin
Philpott's Site)

Crybaby
- Jim Dunlop (Justin Philpott's
Site)

Vox
V847 Wah (Justin Philpott's
Site)

Unicord

Super Fuzz (Guitar Related Circuits)

Super Fuzz (GEO)

You might want to check out "How
to build a Superfuzz pedal"

Univibe

Univibe (Guitar
Related Circuits)

Univibe (GEO)

Univox

Square Wave -
"It's a typical 60's fuzz. Not much sustain, but it sounds cool on chords. It
gets that early Keith Richards, Jeff Beck sound." Courtesy of Brad
Fajardo

Square Wave PCB
component placement.

ZBIR

Distor1
-
(Guitar Tube Amps)

Distort2
-
(Guitar Tube Amps)

Zoom

Expression
Pedal hook up.

Misc Distortion/Boosters

A very cool Japanese
website with lots of cool projects on it. Thanks to Jack Orman for
pointing this one out. Please check out the web site as there are more
projects on there than I have listed here.

Fat
Bastard Paul Cochrane - "Try it infront of a sweet thing... Also going
with the 100 ohm source let's you get a little bit of hair when crankin' the
gain, but you can still get a huge flat/clean boost when you set it down"

MiniBooster
(Japanese
Site), someone else likes this name.

Distortion+
(Japanese
Site)

Overdrive
(Japanese
Site)

Fuzz
(Japanese
Site)

Crunch
Drive (Japanese
Site)

Dist
Drive (Japanese
Site)

Compressor
(Japanese
Site)

Exciter
(Japanese
Site)

BassThru
(Japanese
Site)

Power
Supply (Japanese
Site)

Companion
Fuzz/Wha - Thanks Tobias!

Mini-Booster based Booster

Emulation
of Amplifier Overdirve Through the Use of the Nonlinear Output Response of
Diodes. Interesting PDF on diode distortion etc...

Shinei
Companion Fuzz

Brian May Treble
Boost Circuit - Original. (GEO)

E.C. Midboost
circuit with PCB etc... (Zipped File) Thanks Gilles!

Guitar Fuzz Effect
(basic distorter) PCB
and Layout

High Gain
overdrive pedal (Justin
Philpott's Site) Looks like it would have tons of distortion.

Fuzzstain
(Stellan's
Schematics) Check
out the the text descriptions and Stellan's other schematics.

Lead
Fuzz (Stellan's
Schematics) Check
out the the text descriptions and Stellan's other schematics.

Sweet
Feets Distortion (Stellan's
Schematics) Check
out the the text descriptions and Stellan's other schematics.

Fuzzbox
(Stellan's
Schematics) Read the text
about this distortion.

Equalizer
Fuzz (Stellan's
Schematics) Check
out the the text descriptions and Stellan's other schematics.

Differential
Distortion (Stellan's
Schematics) OK!

Modified
Differential Distortion (Justin
Philpott's Site)

Electra
Distortion (Justin Philpott's
Site) OK! Distortion/Booster circuit. Simple
for beginners.

Angry Beard 3 (Guitar Related Circuits)

fuzz001.gif (Guitar Related Circuits)

fuzz002.gif (Guitar Related Circuits)
OK! This is more of a booster. Not much
distortion in this circuit as drawn.

Modified
fuzz001 (Distortion booster) (Stellan's
Schematics)

jshfuzz.gif (Guitar Related Circuits)

olsonns.gif (Guitar Related Circuits)

Generic Overdrive
and Distortion schematic. (GM
Arts) This pedal is very nice. From a hint of distortion to all out, this
pedal has lots of it. The tone control is understated and rolls off the highs
nicely.

Guitar Fuzz Effect
(Electronic Circuits)

Joe's
Overdrive (Guitar Effects
Projects) - simple one transistor distortion.

Joe's
Metal Overdrive (Guitar
Effects Projects) - simple one IC distortion. See the build
instructions.

3
distortion pedals (Audio
Circuits)

The
Gazember Fuzz (Amplifiers)

Gazember
Preamp (Amplifiers)

Gazember
Hot Tubes Fuzz (Amplifiers)

Gazember
Wah Wah (Amplifiers)

Simple Fuzz Box

High Output Fuzz Box

Koviak - Tube Based
effect.

Speaker Simulators (misc)

Sim1
- (Guitar Tube Amps)

Sim 2 -
(Guitar Tube Amps)

Sim
3-
(Guitar Tube Amps)

Sim
4-
(Guitar Tube Amps)

1X12 Speaker
Simulator by Kurt Godiksen. Check
out the notes on this simulator.

Tube Distortions/Preamps

Fender Preamp (Taos Amp)

(Guitar Related
Circuits)

Tube Driver (AMZ) OK!

Matchless
Hotbox (Justin Philpott's
Site)

Matchless
Vibrobox (Justin Philpott's
Site)

Theremins

termen1r.gif

therschs.gif

Misc

Soul Kiss
prelim schematic. - not verified.
Updated 9/17/01

Jen
Wah/Vol (Guitars, Amps
and Effects)

Rubber Fetish - Envelope
Follower! (Custom
Music Electronics)

Easy Line out
from your amp to mixer. (Time Gagan)

Status Bass
active circuit pictures.
EdwinT contributed these pictures. Look
at this! Rob Strand traced it!

Negative
Voltage from 9 Volt Battery

+9 and -9 from one
battery (GEO) Very cool!

Higher Voltage from
a single battery! (GEO)- Even
cooler!

Bypass
circuit (Effectronics)

Quick and Dirty Test
Oscillator (GEO)- Build this to get
a sine wave test tone.

Clean
up your volume pedal (Stellan's
Schematics)

Cylon
Audio Ring Modulator (Tom's
Synth Cookbook)

Guitar
FET tremolo (Tom's
Synth Cookbook) and PCB

Guitar
Preamplifier with Vibrato (Greg's
Index)- OK! Really good sounding simple
TREMOLO circuit made with a FET. I used 2N3904 and J201 FET for the
transistor types. Worked right away. Nice smooth sound and highly
recommended! Check out the full article.

Slapback
echo-type reverb (Tom's
Synth Cookbook)

Guitar
Signal Splitter Box (Plate
to Plate)

Wha-Filter (Electronics) No
inductor used on this one.

Compressor

Harmonic Sweetener
(Guitar Related
Circuits) Enhancer type of effect.

Controllable Tremelo
Circuit - Apparently the +18 should be -18 volts, the schematic is
incorrect.

Mic Preamp

Tube Mic Preamp

Capacitor
Discharge Tool - for discharging those big capacitors.

Stomp Switch
Wiring - How to wire it.

1,000 guitar site links
- I haven't counted them....

Duncan's
Amp Pages - Tons of amp schematics.

Rane product schematics.

Tone Control - (Electronic Circuits)

Presence
Circuit -
(Guitar Tube Amps)

Quasi-Parametric
Filter -
(Guitar Tube Amps)

Selective
Parametric Filter-
(Guitar Tube
Amps)

Border
Parametric Filter
(Guitar Tube
Amps)

Notch
Filter-
(Guitar Tube Amps)

Wah Wah
Page - (Guitar Effects
Projects) adjustable with trim pots and everything.

True bypass for late
model dunlop wah (LYKE
productions)

Pictures of the mysterious Klon Centaur, front
and inside.

Cool Article Links!

Absolutely
Positive PC Boards(Small
Bear Electronics LLC)

Advanced
Power Protection (GEO) Looks easy!

Basic
Testing of Semiconductor Devices (Sci.Electronics.Repair)

Basic Effects
Wiring
(Guitars, Amps and Effects) Shows basically how effects are wired and
more...

Bypass
On Board - (Small
Bear Electronics LLC) Interesting article on how to make an
actuator for your DPDT

The
Capacitor Reference Guide - (E-Music
DIY Reference Guide)

Capacitor Notes - (Dusty Files Online)

Dead
Bug Prototyping (GEO) Another way to
do simple prototyping. The Epoxy part looks interesting.

Designing
JFET Audio Preamplifiers. (Rason Amateur
Radio Club)

Digital Phase Shifting (Articles - BTC)

Dirty Tricks
File(GEO)

Distortion 101
(GEO)

Distortion
101 (Blackstone
Appliances)

Effect
Power Switching (JD's
DIY Projects for Guitar Players) Also see Adding
a Power Jack .

Effects
Prototyping Techniques (GEO) VERY
nice article on how to prototype circuits.

Envelope Controlled
Filters (Articles - BTC)

Read
the Small Bear Electronics "5F" - FAQ For Fuzz Face Fanatics.

How to trace
out effects(GEO) - yep, this is the
way to trace out effects.

In circuit
transistor checker - (Electronics Plus)

The Guitar Effects FAQ
(GEO) Check this out! Required
Reading.

Guitar
Amp Evolution (harmony-central.com)

Hot Rod Mods
for your guitar (Welcome to the
BigRockShow)

IBM Patent Search - Search
online for interesting patents.

Impedance -
What and why? (GEO)

JFET
Amplifier Calculator

Low pass
passive filter calculator.

More than you ever wanted
to know about phasers (Articles - BTC)

Mu-tron Musictronics. (Articles - BTC)

Overdrive
Unit article -(Steve's
Home Page) mostly about amp building but some good stuff there.

PowerPointing
Schematics and Boards (Small
Bear Electronics LLC)

Really
Quick and Easy Boxes (GEO) With templates.

Simple,
Easy Parametric and Graphic EQ's (GEO) Pre and Post EQ man.

Substitutions for
EPFM parts. (GEO)

Stalking
the Wild Mouse (GEO)

The Talkbox FAQ -
lots of information on Talkboxes, including how to make your own!

The
Technology of Bypasses(GEO)

The
Technology of the Fuzz Face (GEO)

The
Technology of Oil Can Delays (GEO)

The
Technology of the Tube Screamer (GEO)

The
Technology of Wah Pedals (GEO)

The
Secret Life of Pots (GEO)

The
Technology of Phasers and Flangers(GEO)

The Technology of
the Univibe (GEO)

True Bypass
modification for late model Dunlop Wah-Wahs

Tubes vs. Transistors

The Sound of
Capacitors

Voltage Doubler
Circuit

Sites with Sound Samples/Settings

Budget Boutique
Stompboxes focuses on getting sounds out of your existing boxes.

GTRFX.COM sound
samples of several boxes.

Tonefrenzy.com the king
of sound samples. TONS of samples.

More Misc.

Guitar Players
Manifesto - interesting.

How to
get SRV's tone - for those who care.

Rhyming
Dictionary

Virtual Guitar
Magazine - Fantastic Online Guitar Magazine!

More fun/interesting places