Fuzz-1 (passive module)

Something that interests me and to avoid developing the subject on the other side I opened this one.
A topic started by @BlackDeath here, a passive fuzz module by Skull and Circuits.

Sorry @BlackDeath but I found your stripboard a little too extensive for my taste (there are no small savings :slight_smile: )
I try to made one more small (untested, i hope there’s no mistake)


Are the two gold circles mounting holes?

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Yes it’s mad for a small circuit like this one, i don’t know why i do that surely a reflex :upside_down_face:


The 1 µF cap on the lower left (connecting input to Q1 base) is seeing an AC voltage — the input — so out of an abundance of caution I’d go with an MCC or nonpolarized electrolytic for that one. The other two should be fine.

Ah okay, well done. I was also thinking about adding a switch.

I actually prefer “big”, widely space stripboard layouts, I find that all of the places where somebody is trying to make small savings are where I fuck up and make a mess, and that vertically-mounted resistors sometimes break during construction as I’m flipping the board on it’s back, and I don’t like making too many trace cuts. The flip size is needing more jumpers.

I started stripboarding the Skull and Circuits envelope follower last night too, was gonna throw up an ‘unverified stripboards’ thread.


@BlackDeath , for the switch I put it on the stripboard but the guy in the description says that it doesn’t belong much to the circuit.
@analogoutput , for the cap 1uf, I just copied the original schematic. All are polarized. To try.

Ohh, I see what you’ve done, I was going to add a switch not to power the LED (I was gonna just leave the LED on all the time), but as a “bypass switch”, since to use this musically I’d want to switch it on and off at different parts.

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yes a bypass will be surely better, a DPDT swith for that

I like this thing. Construction quality isn’t what I’d like it to be but it’s held up for two years now and the price is low. Among its benefits, vertical resistors aren’t a problem.

Looks like only one on @Dud’s layout, aside from the ones for the “mad” mounting holes.

I know, I know. But I’d choose a non polarized cap for that one.

Would that go like this?


is that you have already built or tested this circuit ?

yes for the bypass switch ! :slightly_smiling_face:

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Haven’t built it, no. Well, built a simulation.


update with NP cap and DPDT switch, and only one mounting hole :slight_smile:


Alright, now get building and let us know if it works! :stuck_out_tongue:

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I’m not there yet, it will be for case 5
it starts to be filled (on paper) :grin:


You’re making your cases too small. Make one tomorrow that’ll hold 200 modules and then we won’t have to wait.


but to move it … I already thought about it but you have to build the maxi case and then the house around, and after you can never changing to another house till your death :grin:

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Buy a moving lorry. Fill with synth modules. Park next to new lorry. Etc.



Sounds good to me! Moving sucks.


Yes it’ was for the joke but i don’t want leave my house too, even if i 'not have a unmovable maxi case inside :slightly_smiling_face:

I put Dud’s layout together this morning. The only 1uf caps I had on hand were polarized tantalums, and I only had 100kB pots.

Everything works. I shot a little demo video with a simple Plaits sequence in chord mode.

The output was pretty quiet, so I have the output patched through the amplifier circuit I use for bringing guitars up to synth level. Because of that the bypass switch isn’t very useful in this patch; The wet signal comes out 5x too high