Akashic Guitar effects circuit lookup

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Tagboard Effects

ZVex MachineVerified

Based on the Z.Vex Machine· 6 other boards clone it

Category
Distortion
Build
Vero· 16×15· 12 cuts, 4 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Distortion, ZVex

From the post

Zach's info about the original:

I designed this new distortion generator, Machine, with some different limitations. Like try playing chords through it. Hmmm. But put it in front of any string of fuzz pedals, and try to make it disappear. Machine is actually a dual frequency-tripler circuit that uses crossover distortion for the first time in any pedal, ever. It generates the distortion of the wave in the sloped part of the cycle, instead of the peaks and valleys like all other distorters and fuzzes. In other words, it distorts when your guitar string is in the middle of vibrating, while it's swinging, not as it's turning around. That's the same place where your speaker cone is sort of coasting, between all the way in and all the way out. Where nothing is happening, this pedal happens. With Machine you can leave your favorite distorting pedals on and still add a new element of energetic grind.

One thing to keep in mind, however, is that this pedal basically sounds horrible. It's primary purpose is to cut through. But like a wild man with a machete, it is not nice.

Knobs are In, which is drive; Limit, which clips the original waveform off at about the same size as the harmonics (if you want); and Out or Volume, which is output level. If the Limit knob is set to the right, the signal remains unclipped. You'll notice the dynamic response is higher than most pedals. If you put a tremolo pedal set smooth in front of it you'll hear it sweep through it's wild frequency multiplying stages, or if the trem is set for square wave it will jump back and forth between crunchy harmonics. Conversely, you can get ringing harmonic effects using a dynamically freezing pedal in front of it like a compressor. The biggest drawback to this pedal is that of anything in your arsenal, it's the most likely to get you kicked out of the house by your mom, girlfriend, boyfriend, or wife. Or roommate or Dad. Or Grandma. Even your dog. Whine. Keep in mind that this pedal needs to see a sloped wave in order to do it's thing, so an undistorted guitar signal going into it will allow it to generate the strongest harmonics.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 22 rows

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RefValueNormalizedTypeNotes
Resistors 6
×447K47kread from the layout by eye
×422K22kread from the layout by eye
×410M10Mread from the layout by eye
×25K15.1kread from the layout by eye
×1470R470read from the layout by eye
×12K22.2kread from the layout by eye
Capacitors 3
×41u1uelectrolytic; read from the layout by eye
×1100u100uelectrolytic; read from the layout by eye
×1100n100nread from the layout by eye
Diodes 4
D11N41481N4148read from the layout by eye
D21N41481N4148read from the layout by eye
D31N34A1N34Aor try Schottky such as BAT46; read from the layout by eye
D41N34A1N34Aor try Schottky such as BAT46; read from the layout by eye
Transistors 6
Q1BS170BS170MOSFET; read from the layout by eye
Q22N39062N3906read from the layout by eye
Q32N39042N3904read from the layout by eye
Q4BS170BS170MOSFET; read from the layout by eye
Q52N39062N3906read from the layout by eye
Q62N39042N3904read from the layout by eye
Potentiometers 3
InB5KB5kPotentiometerread from the layout by eye
LimitB50KB50kPotentiometerread from the layout by eye
OutB100KB100kPotentiometerread from the layout by eye

Other boards based on the Z.Vex Machine