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Flash Filter Fuzz

3/9/2015

9 Comments

 
Update 2015-03-29: I added a vero layout of the deluxe version. Thanks to Synsound at the tagboardeffects forum for verifying!

Here is a new original design. :)

The Flash Filter Fuzz is a inverter-based squarewave fuzz with a resonant highpass filter and sample & hold modulation. I made layouts for two different versions, a standard and "deluxe" version.

Here is a demo-video of the deluxe version (modulation starts at about 4:00)
I found this pedal kinda hard to demo, but you should get the idea. :)

The controls are as follows:
Intensity: This controls the strenght of the resonant peak. Turn it up and it will oscillate.
Resonance: This controls the frequency of the filter cutoff/peak.
Rate: Controls the speed of the sample and hold modulation.
Bias: This controls the depth and range of the sample and hold modulation. It was originally intended as a internal trimpot, but I found it very useful as an external pot. Ultimatly it should been two different pots to control both range and depth, so the 200K pot is a bit of a compromise, hence the not so perfect sweeping action.
S&H switch: This is a on/off/on switch that has 3 different modes; LFO disengaged, LFO free running and LFO gated by the guitar signal.

With the LFO free running and the intensity turned up into oscillation the circuit turns into a synth/noisemaker thingy. :D

Deluxe version layout and schematic:
flash_fuzz_deluxe_PCB.pdf
File Size: 156 kb
File Type: pdf
Download File

flash_deluxe_vero.png
File Size: 233 kb
File Type: png
Download File

flash_fuzz_deluxe_schem.pdf
File Size: 68 kb
File Type: pdf
Download File


Standard version PCB and vero layouts:
This version doesn't have the sample and hold modulation and is alot simpler to build. It's also tuned slightly different so that it doesn't oscillate with the intensity turned up.
flash_fuzz_PCB.pdf
File Size: 110 kb
File Type: pdf
Download File

flash_filter_fuzz.png
File Size: 123 kb
File Type: png
Download File

9 Comments
Doug link
3/10/2015 07:52:14 am

Excellent metal sound! Original.

Reply
Fredrik Lyxzén link
3/10/2015 07:39:55 pm

Thanks! Glad you like it :)

Reply
Hugues
10/13/2015 10:00:47 am

Any idea how well this will work with a bass?

Reply
Wizombie
3/23/2017 09:07:26 pm

Hey man built the delux version of this on a vero and I seem to be having volume issues it's working but can only just hear it. Any suggestions?

Reply
Fredrik Lyxzén link
3/28/2017 01:32:46 am

Hi Wizombie,
Check you pot, and if it's ok. Try moving the output from the board to the top right row (before the 100K resistor). It will increase the output volume quite a bit. I hope that helps! / Fredrik

Reply
Wizombie
5/5/2017 10:23:18 am

Cheers for your help fredrik man worked like a charm . Now onwards too mind raping fuzz

Fredrik Lyxzén link
5/6/2017 05:14:04 am

I'm glad to hear that it helped. :)
Cheers / Fredrik

wizombie
5/19/2017 04:33:40 am

hey fredrick i know i must be quite a pest by now but should i be adding a power filter cap to your effects? if so what size ? 100uf?

Reply
Fredrik Lyxzén link
5/19/2017 06:04:37 am

Hey. No problem. :)
A 100uF would be fine. But the vero layouts and PCB etch file already has that included (the 100uF electrolytic). Cheers / Fredrik

Reply



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