Hi everyone

I'm releasing a new DIY project today: Into the Unknown Guitar Synthesizer Deluxe.
It's avaliable as a PCB and a complete pedal. Musikding is soon releasing a full kit aswell.

More info and sound samples at

I hope you like it :)
Cheers / Freppo

I got this in an email today from Texas Istruments. A document on CMOS switching, I thought it might be of interest to some.

HI.

I want to make judder that have only three toggle switch.
But i cant find circuit and layout.

Nothing fancy here, it's just another variation of a fuzz face. The cool thing is that I saw that the octavia pedal was actually using some kind of fuzz face design as an input stage. So I made something hybrid to put both the fuzz face and the octavia in one small box. It sounds cool, even though the octavia mode is not as good as the original, I like the sound out of it!
The presentation on my website
(It'll be available in kit as soon as I get the batches of boards...)

Quick example of...

Hello,
I'm new to this forum, but not new to building electronics. I've successfully built several 12ax7 based preamps, a few EL84 vox style amps, and a couple El34/6l6 fender style amps. I've also successfully built a few pedals, simple bjt boosts, op amp buffers, a couple tubescreamer clones, and one Keeley four knob compressor ROss compressor.

I'm working on a crybaby wah circuit, in a standard pedal housing, to use as a filter pedal. I can get the circuit working, but can't get an unwanted...

Apparently circuit protection is not something I'm good at. I've been trying to understand which direction a zener would be installed in Joe Davisson's Obsidian to prevent frying another BS250. Between the P-Channel devices and the negative ground drawing, I'm very confused.

To help myself along, I modified the schematic by moving the ground to +9v and the -9v to ground. The zener is in purple, and my assumption is that it should be installed with the cathode on the +9v side. Am I on the right...

Here's the schematic of an octaver pedal that I wanted to build for a friend a year ago.
I never really had time to do a stripboard layout for it so it's still a work in progress. :roll:

Just wanted to show you guys what I came up with and maybe get some feedback concerning the schematic.

First stage is an input buffer followed from the second stage which is something like an active BMP tonestack.
The 3rd stage is a softclipping circuit which I found on AMZ's site:
After that the signal is...

I just posted this on the other forum so I might as well put it on here as well. It's a fully featured programmable PT2399 delay pedal with 24 presets, long delays, modulation section, tap tempo, rhythmic subdivisions, tails, effects loop and more. I'm not sure if anyone will be mad enough to actually build it (it's built on two large vero boards and has 260 components) but here goes:

Design overview:
Audio board schematic:
Control board schematic:
Audio board vero layout:
Control board...

Ok guys, a little insight on the 555 based voltage doubler.
So today i had some time to do some tests, which turned out quite nice.
For an input voltage of 9V i've managed to put out ~15V under 18K load and almost 16V under 100K load.
Part of the noise is from the fact that was made on a breadboard and high-frequency and breadboards ... well they do like each other.
Here are some pictures from the experiment.
Any questions and comments are welcomed.

Regards,
DeX

Hello guys,

Long time no posts. Had a lot on my back and a lot of projects to be done, so after a while, i've managed to finish this project that was on my mind for some time now.
It's a small full tube practice amp that uses 6N16B double triode as an output tube (submini) and a 6N16B / 6N17B double triode as a preamp tube.
The schematic is based on Marshall 18W and the power stage is made in a self-split configuration.
Controls are: 1 volume and 1 tone knob and one switch that will enable a...

use a 300k trimmer to bias q3
definitely use a 250k for gain
i recommend to mod it and get a sweep pot in place of switch..

and that's all for now!sorry for taking too much space!

i had to get that out of the way...
always loved the os mutantes fuzz sound, so i found this:

which of course, meant i had to build one. so i did yesterday.

Updated layout is here:

other than a couple things in the BOM beneath being mislabeled, the layout itself is built and verified.

used next closest values in a couple spots, 3.9n for 3n, 2.2k for 2.5k , had to make a 3.3m resistor with a 2.2 and a 1m in series, used a 10k trimmer. built initially with bc547's, tried a gamut of...

Hey guys what do you think about this design by runoffgroove group?

see the original page

I got tired of bread-boarding elaborate circuits for hours and having them not work, so i threw this together in a hurry knowing it would do something , and I was pleased with the resulting sounds:

bazzrite_schem_nocentelli.png

The mix pot pans between stock bazz fuss at minimum, through a varied palette of graunchy out-of-phase fuzzy sounds complete with weird filtery/phase-shifty decay, and when turned fully up you get a reasonably sustaining high gain fuzz. It's got good clean-up with...

Here's a new original design :)

demo song clip that I threw together:

More info, vero, pcb layout and schematic:
www.parasitstudio.se

I hope you like it!
cheers / Freppo

Stripped. No jacks, inductor, board, etc. I've been trying to think of something interesting to do with it. Anybody have any ideas?

Hello guys. I have few questions about pedal circuit protection:
- If I want to protect circuit from voltages bigger than 9v is it enough to use one zener 9,1v diode between ground and +9v or do I need some extra components?
- If I use zener diode connected in that manner do I need to connect 1n400x for reverse polarity protection or no? Will zener protect from reverse polarity?
- How can I protect circuit that uses DC current from AC current?
Thanks in advance

Hello guys. I have a question.
I wanted to make AMZ Mosfet Booster

and add switchable bass/treble/mid boost. Can it be done in this circuit and how?
I wanted something in this style

Thanks in advance

HI 大家好
下面是关于DIY DOD 308的制作

原理图

下面是PCB的制作和焊接

完成

1590B BOX 改进了图案和骷髅旋钮 VERY COOL

改进了指示灯 在脚钉下面

Hi Everyone,

Here's something I'm going to try building this fortnight, it's the ETI Valve Distortion Unit from the Electronics Today International magazine that used to be available about thirty years ago before ETI went bust, I had been trawling the internet for some time looking for a copy of the original circuit without any luck, but, I managed to find a hand-drawn schematic while I was looking for something else amongst my stuff, I made a new drawing and added some notes and then scanned...