Here are some effects for guitar, bass and related instruments. There are commercial and "home-brewed" or modifyed commercial effects. The schematics are drawn in Electronics Workbench and appear as gif images.

I'm awake again, and here you will be led to my new index page!

Last updated: 130106.

The RME-5 effects pedal. Two distortion channels with two distortion circuits each (rhythm and lead) plus a phaser on board, I made the phaser sound miraculously perfect!. It was originally built to a friend in 96-97. Go here! to find the schematics

RME means Robin's Multi Effect. Previously I have made
RE-31 (Three effects, number one), with an Craig Anderton Compressor, a Fuzz Face and a Lead Fuzz (schematics on Stellan Lehrbergs site). I often used it when I began playing guitar in a group (with S. Lehrberg among others). It gave me many variations of sounds. Nowadays I use it for bass. The Fuzz Face gives an amazing fat and powerful grunge to the bass sound. You can set it to clip only on peaks, and you can vary your sound with the touch of the strings!
RME-10, a big box with several effects and preamps. I like to give the buildings individual names.

A picture of RME-10:

I have now added links to some of the schematics in RME-10.
The effects from left to right: Craig Anderton's Compressor, Carlsbro overdrive (my mods to a Carlsbro preamp), Ibanez Fat Cat distortion, Tremolo by Stellan Lehrberg, DOD Noise gate, Bi-phaser, Mic preamp (now removed), Guitar preamp with overdrive (germanium diodes), Parametric EQ.

Ibanez Fat Cat Distortion (Stellan).
DOD Noise Gate (Stellan)
Craig A. Compressor (Stellan)
Parametric EQ

Some links to other electronics sites!

Name/short description Part gif txt

Transistor preamp A mix of Laney, Halkan amps and my own ideas and modifications. Channel A = overdrive

Channel B = clean/crunch

Spring reverb driver/receiver and mixer

Ultra-Fuzz. A fat sound and a built-in noise gate. (By Craig Anderton.)

Red Fuzz. A simple distortion circuit by me, with LEDs as clipping components.

Dual Filter Voicing Unit. This is a very powerful filter which includes two separate frequency bands plus a preamplifier and a mixer. By Craig Anderton. Original schematic.

With my modifications, useful for bass.

Octave doubler The output sound is not very clean, but can be used before for instance a distortion circuit.

Effect switch An electronic foot switch if you only got +9 or +15V.

Parametric Equalizer Useful for guitar, bass etc.

Headphone amplifier Class A, for all kind of headphones.

'Valve Distortion' Fuzz Box. Adds great overtones to your guitar sound.

Jen Fuzz Makes the guitar sound hard, rich of treble.

Fender JB Special preamp You can mount it in the instrument. With variable filter and a low output imp.

Effect indicator See how hard your loudspeakers work.

MXR Noise gate Noise gate for single +9V supply.

Hyper-Fuzz Odd fuzz circuit from ETI.

Vox Suppa Tone Bender Fat fuzz sound.

BOSS Heavy Metal HM-2, updated 101099

Super Tone Control (Wha-Wha) with hi/lo/bandpass selection. Original schematic

Wha-Wha

Back to my index page

have been here since 051197.

Robin Tomtlund-Edman

http://hem1.passagen.se/robin2/effects.htm

Name/short description	Part	gif	txt
Transistor preamp A mix of Laney, Halkan amps and my own ideas and modifications.	Channel A = overdrive
	Channel B = clean/crunch
	Spring reverb driver/receiver and mixer
Ultra-Fuzz. A fat sound and a built-in noise gate. (By Craig Anderton.)
Red Fuzz. A simple distortion circuit by me, with LEDs as clipping components.
Dual Filter Voicing Unit. This is a very powerful filter which includes two separate frequency bands plus a preamplifier and a mixer. By Craig Anderton.	Original schematic.
	With my modifications, useful for bass.
Octave doubler The output sound is not very clean, but can be used before for instance a distortion circuit.
Effect switch An electronic foot switch if you only got +9 or +15V.
Parametric Equalizer Useful for guitar, bass etc.
Headphone amplifier Class A, for all kind of headphones.
'Valve Distortion' Fuzz Box. Adds great overtones to your guitar sound.
Jen Fuzz Makes the guitar sound hard, rich of treble.
Fender JB Special preamp You can mount it in the instrument. With variable filter and a low output imp.
Effect indicator See how hard your loudspeakers work.
MXR Noise gate Noise gate for single +9V supply.
Hyper-Fuzz Odd fuzz circuit from ETI.
Vox Suppa Tone Bender Fat fuzz sound.
BOSS Heavy Metal HM-2, updated 101099
Super Tone Control (Wha-Wha) with hi/lo/bandpass selection.	Original schematic
	Wha-Wha