Based on a bass overdrive pedal from a very famous North American amplifier manufacturer, but in a much smaller form factor designed to fit inside a Hammond 1590BB or equivalent NSC enclosure, and with true bypass :wink: Freestompboxes ROTWEILER BASS OVERDRIVE 220613.rar freestompboxes.org ROTTWEILER BASS OVERDRIVE 220613 photoview top.BMP freestompboxes.org ROTTWEILER BASS OVERDRIVE 220613 photoview bottom.BMP freestompboxes.org ROTTWEILER BASS OVERDRIVE 220613 composite.BMP
The board is...

The bypass switch in wah pedals always bothered me, so much that I actually barely used it. Having to start and finish in the toe position while firmly pressing down. Then again if the switch actuates too easily you could accidentally switch it off during playing, I just never liked it. So years ago I started to think about an alternative way and it seemed the most natural thing to me that the pedal should activate when the foot is on, and deactivate when taken off.

Since the pressure sensors...

Simple LPF-ish filter circuit using one opamp, based on the filter from Ray Wilson's Weird Sound Generator

...but with the frequency sweep controlled by a proximity-detecting external LDR, manipulated by foot or hand (nicked from deadastronaut's Lightwah circuit):
lightfilter_schem_nocentelli.png

Vero, not yet verified:
lightfilter_vero_nocentelli.gif

Note that the vero does not include a resonance control (I think I will always use it just below max, hence the 680 ohm resistor in place...

My main amp for many years was a Marshall 5210 solid state from 1983. These were the first solid state Marshalls (along with the Lead series amps) and have always been renowned for sounding particularly good for a solid state amp. I got rid of mine because I got a tube amp that I like and the cleans on the 5210 had a kind of honky quality that i didn't really like too much. But the gain channel was amazing!

So what do we do? Well, we go and take the dirty channel preamp and turn it into a...

I have always had an odd fascination with sample/hold effects. I thought about building one, but there are a lot of stories of the difficulties around the Maestro FSH-1 DIY builds. I saw the Subdecay Proteus and thought that was cool, but I wasn't going to drop that much on a pedal I may not use too much. Fast forward to a little over a year ago when I mangled my hand in a weightlifting accident and I couldn't play or be in the woodshop, I decided to dive into microcontrollers. I realized...

Orignally from this website:
Rollz-5 is a weird experimental modular percussion sequence synthesizer thing. You can patch the different modules together in unique ways and there's many possibilities for fun.
For ease of constructing, I created this pdf of the original documentation images, so that it will be easier for people to print them out at correct scale, and also make it easier to read as a consolidated booklet instead of an assortment of gif files.
Rollz-5.pdf
There is an expensive...

I'm a big fan of Doug Deeper's Mid-Fi Electronics stuff. Especially the amazing Clari(not), for which I've owned production versions as well as making a few of them myself. His envelope control circuit is so simple, yet can make sounds that range anywhere from spastic brain-hemorrhaging space farts to subtle, dynamically controlled tape wobble.

I've been building some other PT2399 delays and have noticed how different some of the filtering, buffering, and feedback sections of the circuit can...

Hi everyone!

I was looking for a Boss CS-2 clone project with reliable parts, and realized there is none over the net.
So, I decided to create my own project based on a CA3080, and true-bypassed as I wasn't really lucky with Boss/Ibanez buffered bypass by the past...
Last thing: I wanted onboard pots as I find it really convenient when it's time to box the circuit.

My work is largely inspired by the modified CS-2 service manual that you can find almost everywhere on the internet and the Joyo...

i call it the stupor phuzz. it's ok, not fantastic, but it doesn't really suck, either. pretty bog-standard easy build and circuit based on standard dumb principles. feel free to fuck with cap values etc, the clipper... the pre control you can go a bunch of different values. depends on what kinda gain ya want. same with the fuzz. 100k is fine, 500k, didn't try 1m. 250 seemed best. ya gotta easy 20% tolerance, and i tried to make it with bog-standard parts and values most folks are likely to...

Hello!
This is my version of Electric MV120.
Scheme -
samples are recorded by the microphone to the microphone input of the laptop (Iguana - tube amp - cab 1x12 Celestion Seventy80 - microphone - mic_in - Audacity)

Hey!
Just want to share my new build, a pt2399 based vibrato.
It can go from lofi-trash-chorus sounds up to completely insane pitch chaos.

i plan to make a better version with op-amps for input buffering and blending, since the 386 tends to distort even with moderate input levels.

basic idea is that a pseudo random voltage controls the delay pin on the pt2399 and with it the pitch.

video:

schematic:

This has NOT been verified yet. I will post again to verify once the boards arrive.

Okay, so this is a very simple almost-5W chip amp using the TEA2025 IC. It's cheap and readily available, and it can run on +9V (which works out great for pedal guys). Okay, technically it's 4.7W running in bridged mono with a speaker load of 8 ohms. But 5W has a nicer sound to it, marketing-wise.

I don't think it will need a heat sink because four of the pins only connect to ground, which probably means they...

I did an octaver with CD4013s. I think I could have done it simpler, but I keep the simplification for a version 2...
This one allows to mix dry + Fuzz + -1Octave + -2 octave signals. These 3 last signal can either be filtered one by one or all together.
I tried to achieve the best triggering I could (still not perfect), and thus ended putting a pot to adapt the trig to your guitar.
It sounds very very fat and acid, and it's very cool plugged in a resonant filter like the Love philter ! :wink:...

hi! this thing is a leaky push/pull sample and hold unit that is triggered when the derivative of the input changes sign or when the optional oscillator changes state. didn't really get to test that particular hookup yet, but should work ok : ).

detailed description:

cheers,
spacecarrot : D

oh hi! this is a simple circuit for adding spillover to delay/reverb pedals. didn't test it yet, but should work :D. dry switch up if pedal outputs dry, down if it is in kill dry mode for more consistent dry signal. inversion cancellation should work for the purpose and reduces parts count.

repo is here:

cheers,
spacecarrot

Had a good look at a CR120 last week. The Clean channel is very sweet, but when pushed with a boost gives a nasty 'fizz'. The overdrive channel needs no boosting because it is a fantastic heavy monster sound. Since I like the idea of preamp pedals, I figure the crunch channel of this amp could make an awesome dirtbox. I'll attach the drawing of the schematic (drawing is mine, circuit-design is not). I'll run some simulations later this month to possibly incorporate fully parametric mid...

Hi there.
I want to present my project fuzz (fuzz-overdrive) based on dual-gate mosfet's BF998.
BF fuzz with bass guitar

BF fuzz with guitar

i can't find anymore on the web, the documentation about the forum vibe project, does anyone saved it and kindly share whit me??? i want to build a vintage one and it would be nice if you have the last review of this project..... thank you my friends