Final year project

Muff board done.

Completed the PCB layout for the Big Muff including all of the modifications. I have started work on the final board so I will be able to print my layouts and etch my boards in the coming weeks.


Transfer corrections.

I have gone over the transfers for both the Fuzz Face and the Bazz Fuss. I have increased the smaller pad sizes and added pads for the momentary feedback footswitch on the Bazz Fuss.

PCB transfers.

Here are the first two transfers ready for printing and etching.

Bazz Fuss PCB.

The second of my four fuzz PCBs is complete.

First PCB layout.

I created the PCB layout for my modified fuzz face pedal using the Eagle PCB software. I chose to use board mounted potentiometers as it reduces the amount of off board wiring in the pedal so it will look neater and I will be able to build it more efficiently. My next PCB design will be for the modified Bazz Fuss before moving onto the more complicated fuzzes.


Second breadboard test.

I built the Bazz Fuss circuit onto my breadboard and implemented the modifications discussed in the specification list. After testing the combinations of sounds that could be achieved using the controls I have decided that the Gate knob will not be on the final pedal as when combined with the other modifications it did not create the desired effect.


I have decided on the four different fuzz pedals that I will be basing my project on, they are the Dallas Arbiter Fuzz Face, Electro-Harmonix Big Muff Pi, Fender Blender and Bazz Fuss. All of the pedals will feature modifications that will allow them to sound drastically different from the originals. One feature that will be prevalent in all of the pedals is a feedback loop, each pedal with it’s own different way to manipulate the feedback loop. The specifications I plan on building each pedal to are as follows:

Fuzz Face:
– Volume, Fuzz and Voltage knobs
– Toggle switch for compressed bassy tone
– Footswitch to engage feedback loop with LDR control
– Bypass footswitch

Bass Fuzz:
– Volume, Fuzz, Gate and Feedback knobs
– Two position tone toggle switch
– Momentary footswitch to engage the feedback
– Bypass footswitch

Big Muff Pi:
– Volume, Gain, Mids and Tone ┬áknobs
– Tone Bypass toggle switch
– Toggle switch to engage LDR control of feedback loop
– Toggle switches for Si/None/Ge for the clipping diodes in both first and second clipping stages
– Footswitch to engage feedback send + return jacks
– Bypass footswitch

Fender Blender:
– ┬áVolume, Gain, Tone, Blend and Voltage knobs
– Octave remove toggle switch
– Footswitch to engage feedback loop
– Toggle switch to engage LDR control of feedback loop
– Toggle switch to engage send + return jacks of feedback loop
– Tone bypass footswitch
– Bypass footswitch