Fuzz clipping transforms the waveform from our guitar into a nearly square waveform. This is called "hard clipping", and it's done to extreme levels. This results in a very different sound than the clean, clear waveform that we hear coming from our guitars. acoustic fuzz treadle circuits are simple. Most don't even need an opamp.

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These will often use transistors, much like a Boost pedal. Because it is so easy to modify, Fuzz pedals often have a boost option. As I said earlier, there are different types of transistors. Some use germanium transistors while others use silicon-based ones. If you have a germanium-based pedal you need to monitor the temperature. They can heat up and change the tone. 

There are many things you may have heard about fuzz, distortion, and overdrive. Although I was taught to place the fuzz near your guitar, or perhaps just behind the wah, I have always found it enjoyable to play with the signal chain and find something different. I would advise you to do the same. You don't have to conform to conventional wisdom. Many cool sounds can be made in the space between signal chain placements and what conventionalists consider to be completely stupid.

There are many ways to "stack" your distorted waveforms. You can also a fuzz pedal to clip a hard-clipped fuzz signal. You can make some very interesting combinations. This can be fun to experiment with, especially if your modeler or software allows you to easily change the chain without having to buy 7 or 8 individual pedals.

You can do tone shaping and gain staging with your pedalboard by making sure that you have a clean canvas and an amp with enough headroom to handle any unusual waveforms.