Random Number Generator

This is Midfi Electronics “Random Number Generator”. It’s a radical fuzz that adds oscillation notes that randomly arpeggiate off of the fundamental note played. Crazy noise maker pedal. I’ve built several of these now by request. The owner of the design over at Midfi was gracious enough to share the schematic on the DIYstompboxes forum which is why I want to make it clear that this is NOT my design, and if you get one for me you are strictly paying me to make a clone since these aren’t available anymore.

This is the first one of these I’ve built. I added the mods of changing a 100k resistor with a pot, and a diode that is switched into the circuit, but quite frankly they don’t do a whole lot. Any others of these I build will just have the volume knob as original intended.


The Uglyface effect is an oscillation based distortion/fuzz pedal with envelope controller designed by Tim Escobedo. It can do a wide varitey of off the wall sounds (laser guns, bagpipes, drones), and it has many different ways to modify the circuit. I’ll liked it so much I built it into one of my old junker guitars (details below).

This is the first Uglyface I’ve built. I built it into some crazy electronics box with huge heatsyncs on the sides. Seemed to fit the circuit some how lol. I did the standard controls of Volume, Threshold, Frequency, and Sensitivity, and added a mix control that worked ok.

I had this old guitar knocking around for a while, so I decided to mount an Uglyface inside of it. It has all the same controls as the pedal above, but I also added a Light Sensor with switch for controlling the frequency knob.

Other Effects Builds

Here’s some of the “one off” pedals I’ve built. Some have already been sold, some I built for folks that aren’t handy with a soldering iron, some for friends, and I’ve actually even kept a few for myself =)

This was one of my very first pedals. I called it the “Junkifyer” and it’s based off of a circuit by Tim E. called the “LoFoMoFo”. Basically what it does is sends a guitar signal through a noisy transistor with a high pass filter. What that does is make your guitar sound like it’s being played through an old radio. I have a work a like design of my own that’s similar to this, but I added another transistor stage, and did the “Broken speaker” distortion differently. If I build them it will be under the same name.
This pedal is sold.

This pedal is Tim E.’s “PWM”. It routes the guitars signal through an oscillator, giving your guitar’s tone a synthy quality. It also has an LFO that will modulate the Osc. frequency in time with the LFO’s rate. I wired a switching jack to the frequency knob that will allow an expression pedal to control the frequency. Controls from left to right are= Volume, Frequency, LFO Depth, LFO rate. It has a bright blue LED to show bypassed state. This pedal is now with Shawn from Child Bite. I’ve built a handful more of these. I have one currently I need to take photos of that has a better LFO with triange and squarewaves.
This pedal is sold

before                                                                          after

Red Llama
This is the Red Llama. The circuit is a clone of the infamous (more then famous) Way Huge Red Llama. It gives fat tube sounding distortion. I disassembled this for a while to use some of it’s parts, but I decided to put this back together in a new enclosure to sell.
This pedal has now sold.

Auto Crash with mods

This is John Hollis’ “Crash Sync” pedal. It’s an oscillator based distortion, pretty thick and noisy. I added the envelope control from Moosapotamus’ “Auto Crash”, and also did a few modifications circuit bender style. I found a two points that change the timbre of the oscialltion. One makes it a more mid-rangey wah type sound, and the other causes the Osc. to be prominent then the guitar’s signal. I also added a momentary stomp switch that removes the guitar’s signal completely for some laser gun fun.
This pedal is sold

Heart Throb Tremolo

Hearthrob Tremolo by MarkM. I had an old Kay Tremolo that I foolishly sold, and now that I’m trying to build a pedal board I knew that I would need a good tremolo. With simple controls this one really gets the job done. Speed works as described, and there is also a switch that will decrease/increase the speed in half. The really cool feature is the “Dwell” knob. This allows you to dial in exactly how deep you want the tremolo to be. From sublte waver to full on choppy thumps. I added the mod to make the LED pulse with time of the tremolo. I’ve reboxed this pedal due to space, just need to take an updated photo.
This pedal is currently on my “surf” pedalboard.

Pedals without photos (yet):

Fool Drive 2
Built this from a project a found online. First time using an etched PCB. Thanks to John Lyons for making them. Check out his site for awesome wood pedals enclosures. I’ve added several mods to this pedal. The switches on the back control a bass boost, gain boost, clipping switch (asymetrical diodes and LEDS), and a switch to change the diodes to symetrical.
This pedal is currently loaned out to a friend.

The Psychtar is a Sitar simulator+Octave fuzz. It’s another of Tim E. circuits. Really cool pedal. I gave this to my friend “P” before I could take a photo of it. Hope to get one soon. I’ve built another of these since. I’ve built another one for myself, just need to get a photo of it also.
This pedal is in my current rotation.

Awesome project from the guys at . Pics soon. This is a great very light overdrive. The exact sound I was looking for when I first started building pedals. Pefect for Rockabilly, roots, and surf.
This pedal is on my pedalboard.

BYOC ESV Tone Bender
My first “Kit” pedal. This “Build your own clone” kit is a work-a-like of the original MKII Tone Bender fuzz pedal. The awesome thing is it came with NOS OC44 Germanium transistors! I added a switch that takes out the booster stage making it more like a Fuzz Face, and I brought the bias trim pot out on the case.
This pedal was sold to a friend

BYOC Confidence Booster
Pics soon. Came free with my ESV Tone Bender kit from BYOC. I made it into a true boost pedals by mounting it in an enclosure, adding a bypass switch, and outboarding the boost trim pot.
This pedal is currently on my “surf” pedalboard

Build Your Own Clone Assembling

After building a couple of their pedals for myself I’ve decided that if there’s anyone out there that wants a B.Y.O.C. pedal, but doesn’t know how to solder, that I will build them for you for a fee. It will be the cost of the pedal on the B.Y.O.C. site, plus a $40.00 to $60.00 build fee depending on the level of difficulty. That will be for a bare box, if you want it painted then we can dialog about the cost of that.

B.Y.O.C. has clones of some of the most famous pedals out there (Fuzz Face, Big Muff, Tube Screamer, etc) that come with the highest quality parts. On top of that most are true bypass, and several of the pedals come with additional mods that stretch out the versatility of the pedal futher (I have the “Rat” clone that has a 5 way rotary switch for 5 different clipping options).

Here is the main page for B.Y.O.C. You’ll find a list of the clones they make here, and if you are interested in having one built by me, then send me a line through the contact page here

Mutator for sale.

I have a completed Mutator up for sale. It’s in one of the cooler cases that I’ve recycled thus far. This Mutator is of a new design. I’ve found a way to make this pedal work as a Fuzz as well as an insane noise maker. This mutator has a Volume knob, Gain Knob, Mutation knob, Mutation switch, Stomp switch to go between Fuzz and Mutation with a bright blue LED, and a Bypass switch with a bright blue LED. I’m listing this one on ebay, and starting the bidding at 100.00 plus 8.00 to ship. Here is the eBay link. Please send me a line through the Contact Page if you are interested in getting a Mutator custom built for you. You can get more info on the Mutator pedals I build here.

This pedal has been sold.


Over the past few years I’ve built a wide variety of instruments. Some are toys/keyboards/whatever that I re-purposed through circuit bending and modification, some are oscillator based instruments that I built from scratch, and more and more I’ve been dabbling in make effects pedals. I’ve built more things then I could ever possibly list here, but I will try and cover some of the more interesting things. If you want a better idea of what all I’ve done you can got to my Soundclick page. I also have a Youtube Page where you can “see” my instruments in action.

I have two effects pedals that I regularly build. One is the “Mutator” which is a heavily modified toy voice changer re-purposed for guitar/whatever. See those here. The other is a modified Fab Echo. I take this rather tame Echo pedal, and modify it into a fully function delay with lots of features. See those here. I’ve also tried my hand at making more traditional pedals, which you can see here.

I’ve modified lots of keyboards, mostly lower end Casios and Yamahas, but also some toy keyboards as well. The mods have been anywhere from a simple pitch control or glitch push button, all the way to an out board RCA patch (Modular Synth Style) with hundreds of possibilites.

Casio SK-1
One of the holy grails of bending. Most benders want one, have done one, or have done many. The first few a did were based on the “Tablebeast” mods (16 point patch bay with on/off switches). Now that I have some experience with them I’ve undertaken some more complex mods.

This is the first SK-1 I’ve modified. It has the “Tablebeast” Patch bay setup with Pitch Knob, Drum Kill, and Poly Kill Switches. This SK-1 is sold

This SK-1 has pretty much the same mods as the above one, but with the addition of body contacts. This SK-1 is sold.

This just the patchbay for my “Glitchstation” SK-1. The keyboard itself only had a 25 pin connector, pitch knob+body contact, drum kill switch, and 1/4 inch output. The patchbay itself contained all the controls. Housed in an old PS2 case (hence the name) it contained a 26 point patchbay (2 points to ground), 8 point switching patchbay, 3 knobs of different values, and sample and hold section, 3 momentary joystics, and an LFO that can be patched with everything else. This project was complicated and difficult, I don’t know if I would ever take it on again. This keyboard/monster has been sold.

Yamaha VSS-30

By far one of my favorite bends. This sampling keyboard does great on it’s own, but with the addition of some bends becomes a sample crushing machine. See my tutorial for pics, and of course how to make your own. If you have one you would like me to modify just send me a line through the contact page

Modified Fab Echo

Modded Fab Echo


On a whim I bought one of these little boxes. For less then 20 bucks I figured what the heck! Did a little searching on Aron’s DIY Stompbox Forum, and found out that the Fab Echo uses a common chip to full on delay pedals. After checking over a couple schematics I (with the help of some forum members) found out how to un-lock the Fab Echo’s delay potential. I have the ability to add a Delay “Rate” knob (speed of repeats), increase the mix knob to full wetness, and to give it full feedback (which literally makes it feedback). On top of these controls I’ve also added LFO’s to the delay circuit that cause strange swirly sounds, and pitch bending weirdness. I mount the Fab Echo on to a larger box (in most cases) to make room for the added controls (there is no room inside these things. I set the LFO up to be powered by the 9v battery, or a pedal power supply. I’ve been charging 140. for the full setup (with LFO), and would of course charge less for a simplier one.
If you are interested in getting a Modified Fab Echo please send me a line through my contact page

For those that want to take on the basic mods themselves here is a link from the DIYstompboxes forum to the best documention of it I’ve found thus far.

Fab Echo

This is the first modified Danelectro “Fab Echo” pedal that I built. I made it so that that it now has a controllable delay time (from short to very long), and also made it so that you can control the delay time with the large knob or light senor. I also made it so that the pedal can feedback when the repeat knob is turned all the way up. There’s an added jack for expression pedal control of the delay time. This one has been sold.

Fab Echo

This is the second Fab Echo that I’ve modified. This one has the LFO feature built into it with with rate indicating LED, Rate control knob, and LFO on/off besides the usual mods. I will definitely take custom orders for these now that I have a good method for modifying them. This Fab Echo has sold.

Fab Echo

This version has all the mods above, plus the Osc. can go between triangle and squarewaves. This Fab Echo has been sold.

Fab Echo

This Fab Echo has all the earlier mentioned mods, plus it has some modifications to the LFO circuit. This one has the ability to have square or triangle shaped waves controlled by a pot to get the in-betweens, and there is a Depth knob that really opens up the versatility of the LFO feature. This Fab Echo has been sold.



Mutators are a series of effects pedals I’ve been working on for a little while. A Mutator is, at it’s core, the circuit from a toy voice changer used as an effects pedal. I’m not the first one to do this by a long shot, but I build them more like real guitar pedals, which I haven’t seen anyone else doing so far.

One thing I want to say right now before I go any further is that these pedals are NOISY. They are not high quality/expensive pitch shifters, or ring mods with no carrier bleed. They pretty much destroy the tone of anything you run through them (in a good way IMHO). Also, when you aren’t playing with the effect on you will get the “background noise” (barely audible hissing, and osc bleed through) from the circuit. These circuits also have a built in gate, so when you play a note the pedal while shut it off when it decays to a certain point (cuts the sustain of the note). I’ve tried putting a booster in the front end of the pedal to help with this, but you could just run a distortion in front of it for the same effect.

Mutator features/options
Mutators in most cases get re-housed into a stronger (metal) housing. I add quality 1/4 inch input and output jacks, and a true bypass stomp switch with indicating LED. They almost always run on a 9v battery, and get a new, better 9v connector. I replace the sound selection switch with a new stronger switch to go between the sounds on the voice changer (usually “Spaceman, Ghost, Alien, Robot”, etc) There are usually 3 different sounds to choose from, so there is a three position switch on the Mutator. I’ve been able to do this with toggles, and rotary switches, so let me know if you have a preference. Next I add a knob that controls the “pitch” of the sounds. These things sound pretty wild just running something through them un-modified, but playing with this knob, and you get some really unusual sounds. This pretty much covers the “Basic” Mutator setup. Average price for one with these controls is about 80.00 dollars.

If the “basics” isn’t enough knobs for your knob twiddling pleasure I’ve come up with several more mods to these pedals.

The first one is the easiest, a Volume knob. Simple, but useful. If that’s the only option you want on a “basic” then ask me nice, and I’ll likely put it on for free.

Next is a Gain knob or switch (depends on the circuit). It cranks up the volume and adds more distortion to the sounds. Quite brutal!

Third is an Oscillation effect. This adds a sqaurewave osc to the sound of the pedal that has controllable pitch with a knob, and an on/off switch for the effect. Very thick and synthy, but of course adds to the overall noise of the pedal.

Fourth is a Feedback control. Much like a Feedback Loop pedal I feed the output of the pedal back into it’s input through a knob, and a on/off switch. Modulations galore!

Another feature I’ve added is a Starve feature. This literal turns down the amount of power that the internal audio chips are getting. It does pretty much what you would expect it to do, noisy degradation of the audio with major gating. Controlled with an on/off switch, and knob.

On several pedals like this I’ve added the ability to control an effect with a light dependant resistor. What the LDR does is change the pitch when something shadows the amount of light going to it (be it your hand, or toe of your shoe). The more light it sees the higher the pitch, the less it sees the lower the pitch (generally, but there are exceptions). Controls are a switch and LDR.

These controls will run at about 120 to 140 depending. These are also very dependant on how the circuit behaves, one mod might work, while another doesn’t. Another thing to add to this part is stomp switches. I can setup any of these features to be activated with a stomp switch+indicating LED so you don’t have to bend down while playing to turn it on. This of course adds to the cost because stomp switches are pricey.

Added Circuity
Now we get to some more advanced stuff where I actually add circuitry to the pedal. As stated above I have put booster in front of the circuit to boost the signal above the gate for a longer sustain. This could have a gain control on it, or could just be set at a static amount of gain.

Next is the addition of an LFO to modulate the pitch. This will effect the sound of the pedal everytime the LFO cycles giving it a rhytmic pitch shifting character not unlike some of the old modular synths. Controls are an on/off switch, rate knob, and (sometimes, depends on the circuit) rate indicating LED.

I have a few more ideas for this that I haven’t tried yet. One is a triangle shaped LFO to cause swelling up and down pitch changers similar to a phaser. The other is an envelope tracking circuit that will change the pitch with the strength of the guitar/whatever’s signal.
These mods run 140 and up depending on what else you would like to have.

Here’s some of the Mutators that I’ve already built. All are already sold unless otherwise indicated. Scroll down to the bottom for the most current builds.

First Mutator

This is the first mutator I built. I decided to leave it in the megaphone housing because I had room for the input, and output jacks. Both of the jacks muted the speaker, and microphone respectively. I also added a switch that would lock the trigger switch in the “on” position. I added a course, and fine mutation control, and body contacts that modulated the effect. This Mutator has been sold.

The second mutator I built I housed in an old Radio Shack computer toy. I set this up to be a “table top” effect for the Noise crowd. When looking at the circuit I noticed that it had an LM386 in it for amplification. I knew that was a common chip for guitar effects, so I used some of the tricks I learned from Colin of Experimentalists Anonymous. Colin has a pedal he builds based off of the LM386 called the Parallel Universe that has a gain and osc. feature. Based off of Colin’s schematics I was able to add these effects to this Mutator. The controls on this Mutator were On/Off switch, True Bypass switch, 3 way Mutation selection switch, Osc. on/off switch, Volume knob, Gain knob, Mutation knob, Osc. Freq. knob. This Mutator has been sold.

The 3rd Mutator I built was the first that was setup like a guitar effect box. I housed it in a the box for a piece of test equipment (the box is HUGE). I set it up with a true bypass stomp switch, 3 way switch to select the different sounds,gain, mutation, and osc. frequency knobs, and a stomp switch to turn the osc on/off. There are bright orange LEDs inside the box for the bypass, and osc switches that shine out the sides. This Mutator has been sold.


This is the 4th Mutator I’ve built. I housed it in an old box marked “High Voltage” (pretty cool!). This one has a true bypass stomp switch, volume, gain, mutate, and strave knobs, 5 switches to select different sounds, and a stomp switch to turn the strave feature on/off. There are 2 bright orange LEDs that indicate bypass, and starve on/off. This Mutator has been sold.

This is the 5th Mutator I’ve built. This one is housed in the control box for an old fog machine. This one has a true bypass stomp switch, gain, mutation, and feedback knobs, an on/off for the feedback, and a rotary switch that selects the different sounds. The red, white, and blue lights on top indicate bypass state, and the orange light indicate feedback on/off. This Mutator has been sold.


I built this Mutator for Opsysbug. It has the usual Mutator controls, plus an LFO feature that stutters the mutation in a rhythmic pattern. The LFO has a rate knob and on/off switch. This Mutator has been sold.


A throw back to the first mutator. This one has the the mutate knob, body contacts that have the same effect as the mutate knob mounted in the handle, feedback switch, gain switch, trigger lock switch (keeps it on), and switching 1/4” input and output jacks. Click on the picture for a sound sample. This mutator is sold.

This Mutator is similar to the IV. It has mutilple switches to select the different sounds, Gain/volume knob, and Course and fine mutation controls. It’s mounted in an old relay box of some sort. This Mutator has been sold.

Housed in one of the cooler enclosures I’ve ever recycled, this mutator has a Volume knob, Mutation switch and pitch knob, and a feedback knob. It has a true bypass stomp switch, bright blue LED, and runs on a 9V battery. It is currently for sale for 100.00 plus shipping. This pedal has sold.