Making My Own Fuzz Factory

Building a Guitar Pedal

Author: bbrzycki


The circuit schematic will be as shown in the image (or here

Another more graphical representation:

I will wire up the configuration + the smaller components on a prototyping board / perfboard which will lie within the pedal enclosure, along with a 9V battery.

For the enclosure, I would like to use a metal enclosure for durability. Since the device uses electrical sound as both input and output, the enclosure material will not affect the actual signal processing. I’m thinking about using a Hammond enclosure (

The dimensions of the ZVex Fuzz Factory are 4.70″ x 2.38″ x 1.82″, so I’m thinking of giving myself some leeway by getting an enclosure that is 5.71″ x 3.74″ x 1.93″ (there wasn’t really a better enclosure size given the dimensions of the commercial pedal).

I’ll also plan on decorating the enclosure to some degree. I found this link:, which goes through a few methods of decorating pedals. I will need to decide which method I think looks best while being feasible. (Obviously, some of the more impressive designs and decorations are pretty expensive or inaccessible for DIY.)

As far as how the pieces will be mounted on the enclosure, on the top, there will be five potentiometers / knobs, a push button for power, and an LED to indicate ON/OFF. There will be input and output 1/4″ jacks.

Here is a simple CAD schematic I made; knobs on the top, push button on the bottom, LED in the middle:



I will be making my own guitar pedal based on the Zvex Fuzz Factory…).  The Fuzz Factory is a fuzzbox, which is used to make a distorted, fuzzy effect to the signal from an electric guitar. The pedal provides a type of distortion by clipping the clean signal, adding various overtones and sustain.


I play guitar in my spare time and record my own music. However, I’ve never actually purchased actual guitar pedal hardware, so I thought it would be fun and practical to build my own! In addition, along the way I’ll learn what’s going on under the hood in pedals that make a “fuzzy” effect. It definitely helps that the Fuzz Factory schematic is readily available online and seems to be the perfect scope for a final project.

Background Research

I found a sample schematic of the Fuzz Factory:

Another representation that’s a bit more pictorial:

With these as guidelines, I will construct / solder up the circuit and place it within an enclosure, just like a commercial pedal!