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EDIT 2014-08-28 I added a PCB layout. I wasn't going to do a PCB layout for this one, but I needed the practice. :) So the pdf contains two different layouts if anyone would want to build it. I also moved the VERO layout to the bottom of the post. Here is something that is mostly just proof of concept. I was playing around with Craig Anderton's Comparator Fuzz, but I wanted to try a dedicated comparator IC insted of an op amp. It's probably tried and tested before, but I could not find anything on a LM311 based fuzz, only this thread that doesn't say alot. Anyway, this is what I came up with. It works well and sounds good. I need to think of a better name for it though.. :) At 0:46 I lower the guitar output for a very short decay on the notes. It's a very gated fuzz (all comparator fuzzes are). A good idea would be to put a booster in front with a volume pot to control the sustain and make it more friendly to low output pickups.
25 Comments
anders
10/1/2014 03:19:07 am
Any progress with this one? Built it and it's sounds awesome as is. A separate lpd1 booster in front of the circuit and a big muff tonecontrol after would be my tweaks. Once again, thanks for a great site. Cheers. 10/4/2014 06:28:43 am
I'm glad you like it! Your tweaks sounds like good addons :) I have not had time to play with it again since I'm been working on a original phaser lately that but I have an idea for a follow up that will use a dual comparator chip (LM393).
anders
10/14/2014 12:37:08 am
Added the BMP tone control and boxed it up today. Didn't added a boost as it's works quite well with hot humbuckers. The tone stack adds a whole new dimension to this circuit, Sound like a cross of a Moog high gain fuzz and a square wave Op Amp Muff. Me like! 10/14/2014 07:39:29 am
Awesome! I would love to see a picture of your finished build.:)
anders
10/15/2014 04:15:45 am
Will do! :-) When I get a fully functional cell phone. I have some more lm311's, will build another one with some more addons :-). I'm really looking forward for the lm393 version and the phaser as well. Cheers A
Trehbz
10/16/2016 02:10:00 pm
made this but sounds more like a wimpy fuzz/boost. Any reason why? 10/27/2016 05:53:02 am
Hi Trehbz,
tim
2/1/2017 05:57:41 pm
THANKYOU. Finally!! someone built this.sounds very synthy on single notes. i like. 2/6/2019 05:42:22 am
The Ultra fuzz sensitivity control adjusts the threshold level for the comparator stage (the part that turns the signal into a square wave) I keep coming back to this thing as it sounds so cool on single note lines.thanks for the reply. im trying to decide whether I should add the bandxall eq or a ca supertone control to the end. love the new wave. ive been waiting for someone to design a utility super awesome lfo cv box like this forever. also love the multiwave. will buy a couple multiwaves soon 5/27/2020 03:30:46 am
Hello
Eduardo
5/27/2020 04:11:15 pm
Nice! Will breadboard everything as soon the pieces arrives and give it a try.
Eduardo
6/30/2020 10:51:54 am
hey Fredrik! 7/2/2020 11:56:03 am
Hi Eduardo,
Eduardo
7/10/2020 06:43:28 am
Hi again Fredrik, sorry to bother you! 7/20/2020 04:12:02 am
Yes, the vero has a 1M pulldown input resistor, which isn't really needed, but it can help reduce bypass switch popping.
Eduardo
7/20/2020 04:58:18 am
Hey man! 2/25/2023 11:52:01 pm
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