# Fuzz-1 (passive module) **URL:** \ **Category:** DIY STUFF\ **Created:** [January 27, 2021, 11:15pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799 "2021-01-27T23:15:32Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 27, 2021, 11:15pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/1 "2021-01-27T23:15:32Z")
Something that interests me and to avoid developing the subject on the other side I opened this one. A topic started by @BlackDeath[here](https://lookmumnocomputer.discourse.group/t/verified-stripboard-layouts/81/227), a passive fuzz module by Skull and Circuits. [https://www.skullandcircuits.com/fuzz-1/](https://www.skullandcircuits.com/fuzz-1/) [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/4/4ce54c490b2b0a29273d252aecec9281fa21fd28.jpeg "Skull and Circuits demo video 6 - Fuzz-1 "the leech"") ](https://www.youtube.com/watch?v=qeTEt9Glc0Q) ![fuzz 1 - skull and circuits](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/7/787fc2fe97a272b733cfd69dbc2098fb3533a7f4.jpeg) Sorry @BlackDeath but I found your stripboard a little too extensive for my taste (there are no small savings šŸ™‚ ) I try to made one more small (untested, i hope thereā€™s no mistake) ![Passive Fuzz 1](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/1/1be1682982bf93a4d85e3bd7b926d2764a5c2f0f.png) ![Passive Fuzz 1 copie](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/1/16488d32fbfd3602298df576887b9cd5d600d441.png) ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 27, 2021, 11:23pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/2 "2021-01-27T23:23:18Z")
Are the two gold circles mounting holes? ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 27, 2021, 11:26pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/3 "2021-01-27T23:26:35Z")
Yes itā€™s mad for a small circuit like this one, i donā€™t know why i do that surely a reflex šŸ™ƒ ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 28, 2021, 1:54am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/4 "2021-01-28T01:54:51Z")
The 1 ĀµF cap on the lower left (connecting input to Q1 base) is seeing an AC voltage ā€” the input ā€” so out of an abundance of caution Iā€™d go with an MCC or nonpolarized electrolytic for that one. The other two should be fine. ---
**Author:** ![BlackDeath](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/blackdeath/32/7644_2.png) [@BlackDeath](https://lookmumnocomputer.discourse.group/u/BlackDeath)\ **Post date:** [January 28, 2021, 8:07am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/5 "2021-01-28T08:07:28Z")
Ah okay, well done. I was also thinking about adding a switch. I actually prefer ā€œbigā€, 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 Iā€™m flipping the board on itā€™s back, and I donā€™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 ā€˜unverified stripboardsā€™ thread. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 9:18am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/6 "2021-01-28T09:18:54Z")
@BlackDeath , for the switch I put it on the stripboard but the guy in the description says that it doesnā€™t belong much to the circuit. @analogoutput , for the cap 1uf, I just copied the original schematic. All are polarized. To try. ---
**Author:** ![BlackDeath](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/blackdeath/32/7644_2.png) [@BlackDeath](https://lookmumnocomputer.discourse.group/u/BlackDeath)\ **Post date:** [January 28, 2021, 9:22am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/7 "2021-01-28T09:22:50Z")
Ohh, I see what youā€™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 ā€œbypass switchā€, since to use this musically Iā€™d want to switch it on and off at different parts. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 9:32am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/8 "2021-01-28T09:32:28Z")
yes a bypass will be surely better, a DPDT swith for that ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 28, 2021, 3:04pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/9 "2021-01-28T15:04:44Z")
> [@BlackDeath](#): > > vertically-mounted resistors sometimes break during construction as Iā€™m flipping the board on itā€™s back [https://www.amazon.com/gp/product/B00Q2TTQEE](https://www.amazon.com/gp/product/B00Q2TTQEE) I like this thing. Construction quality isnā€™t what Iā€™d like it to be but itā€™s held up for two years now and the price is low. Among its benefits, vertical resistors arenā€™t a problem. > [@BlackDeath](#): > > and I donā€™t like making too many trace cuts Looks like only one on @Dudā€™s layout, aside from the ones for the ā€œmadā€ mounting holes. > [@Dud](#): > > for the cap 1uf, I just copied the original schematic. All are polarized. I know, I know. But Iā€™d choose a non polarized cap for that one. > [@Dud](#): > > yes a bypass will be surely better, a DPDT swith for that Would that go like this? ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/2/248b7fd48de9de4b6c69afc6769abbfa97ab16e9.png) ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 5:09pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/10 "2021-01-28T17:09:37Z")
> [@analogoutput](#): > > I know, I know. But Iā€™d choose a non polarized cap for that one. is that you have already built or tested this circuit ? yes for the bypass switch ! šŸ™‚ ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 28, 2021, 5:13pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/11 "2021-01-28T17:13:27Z")
Havenā€™t built it, no. Well, built a [simulation](https://www.circuitlab.com/circuit/79rr23tedz79/leech/). ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 5:55pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/12 "2021-01-28T17:55:23Z")
update with NP cap and DPDT switch, and only one mounting hole šŸ™‚ ![Passive Fuzz 1 by sound bender](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/1/10744187588365f284737ac1f96cacfe8ec4b569.png) ![Passive Fuzz 1 by sound bender copie](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/7/7fbcc62771f76452f3515228839f437f9e1fe5f7.png) ---
**Author:** ![BlackDeath](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/blackdeath/32/7644_2.png) [@BlackDeath](https://lookmumnocomputer.discourse.group/u/BlackDeath)\ **Post date:** [January 28, 2021, 6:38pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/13 "2021-01-28T18:38:54Z")
Alright, now get building and let us know if it works! šŸ˜› ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 6:48pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/14 "2021-01-28T18:48:55Z")
Iā€™m not there yet, it will be for case 5 it starts to be filled (on paper) šŸ˜ ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 28, 2021, 8:20pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/15 "2021-01-28T20:20:26Z")
Youā€™re making your cases too small. Make one tomorrow thatā€™ll hold 200 modules and then we wonā€™t have to wait. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 28, 2021, 11:59pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/16 "2021-01-28T23:59:44Z")
but to move it ā€¦ 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 šŸ˜ ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [January 29, 2021, 12:02am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/17 "2021-01-29T00:02:56Z")
Buy a moving lorry. Fill with synth modules. Park next to new lorry. Etc. Sorted! ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 29, 2021, 12:55am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/18 "2021-01-29T00:55:10Z")
> [@Dud](#): > > and after you can never changing to another house till your death Sounds good to me! Moving sucks. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [January 29, 2021, 9:05am UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/19 "2021-01-29T09:05:42Z")
Yes itā€™ was for the joke but i donā€™t want leave my house too, even if i 'not have a unmovable maxi case inside šŸ™‚ ---
**Author:** ![troberts289](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/troberts289/32/735_2.png) [@troberts289](https://lookmumnocomputer.discourse.group/u/troberts289)\ **Post date:** [January 29, 2021, 3:57pm UTC](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799/20 "2021-01-29T15:57:46Z")
I put Dudā€™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 isnā€™t very useful in this patch; The wet signal comes out 5x too high > **[Fuzz demo](https://photos.app.goo.gl/uABEPuPKPDeFb7G47)** [Next page](https://lookmumnocomputer.discourse.group/t/fuzz-1-passive-module/2799.md?page=2)