The Erratic Clutch Deluxe

Product Files
Schematic283.57 KB
Instructions585.56 KB

The Erratic Clutch Deluxe is a unique effect pedal kit that gives you fuzzy square wave distortion as well as a monophonic sub-octave square wave using a total of only four transistors. The two signals can be used individually or mixed together for a raw and sonically rich synthy output. Full of character and quirk, this pedal will give you a truly original sound.

The middle knob is the bias control. This adjusts the pulse width in the initial fuzz stage of the pedal. Set this knob to fit your pickups and playing style. The closer to the center the longer the note will sustain but with that comes more chaotic tracking for the divider. Moving it more clockwise or counterclockwise will give you more predictable note tracking on the divider with less sustain. The middle will have a small area where the gating opens and noise comes through(position may change when using a battery).This is a good area to start and then slowly dial the knob away in either direction to find your sweet spot.

Circuit Block Diagram

Recommended Settings

Clean Note (for comparison)

Pure Fuzz

Sub Bass

Synth Drive

Questions and Answers
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Hi, my pedal is finished yet. So not working. I Must put the bias knob full and play very strong to get a small cracking in my ampli. So I checked all my copponet places and values. re soldering. checking the tension. and checking with your picture of a finished pedal. All is't good. In your shematic is't no indicated how many tension I must get in different point of the circuit, I think il't a good start to debug my pedal. My first opinion, the transistors are not saturing correctly. can you help me?
Answers (1)
MichaelT
Staff Member
October 15th, 2018
Yes. Send us an email and we can assist in troubleshooting: info@modkitsdiy.com
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Hi! I have built my pedal and I like the way it sounds, however, I fear there is an issue with the octave circuit and I'm hoping you can either help troubleshoot, or confirm if it is working correctly. When I first click the pedal on with the Octave circuit engaged, the sound comes through and it's cool and ripping and the Octave circuit is doing it's thing. However, after about 30 -45 seconds or if I'm playing really fast, I'll notice that the Octave circuit starts to not "Octave" on me any more. I still get the fuzz, but it will momentarily jump from the sub-octave sound back up to the normal pitch and then fall back down to the sub-octave pitch. If I don't play for a little bit, it will sorta clear itself up for a moment afterwards, then the sub-octave action starts cutting back up to normal pitches again. Is it likely that there is something that I goofed up inside the circuit, or maybe shorted something? Possibly cooked a capacitor? Transistor? I should specify here that I accidentally had the 240K ohm resistor that connects to the lug 3 of the 100KL pot shorted out when I first made the pedal and I wasn't getting any sound. I'm not sure if I cooked anything. I know this is a lofty question, but do you know what might be causing the sub-octave circuit to momentarily not sub-octave for me? Is this normal? Thanks in advance, Tim
Answers (1)
MichaelT
Staff Member
March 8th, 2019
Hey Tim! Send us an email at info@modkitsdiy.com and we can get into the details of what might be going on. Thanks!
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