Archive for 2007

Tuesday, February 27th, 2007

Foxx Tone Machine

Foxx Tone Machine Layout

This classic fuzz reappeared in the form of a Danelectro pedal, the French Toast. Here’s some shameless name dropping: Mark Hammer let me actually play through one he had built. And I loved it. 😀 I took the schematic from GeneralGuitarGadgets.com.

Posted by gaussmarkov | Filed in Circuits | 8 Comments »

 

Friday, February 23rd, 2007

Breadboard

Breadboards are an inexpensive way to check out a pedal circuit. And if you decide to try your own tweaks or designs, a breadboard is the only way to go. … more …

Posted by gaussmarkov | Filed in Hardware | 8 Comments »

 

Friday, February 23rd, 2007

Capacitors 5: High Pass Filters

High Pass Filter

If the capacitor and resistor in the low pass filter change places, then the circuit becomes a high pass filter. Indeed the output of this high pass filter is just the output of the low pass filter subtracted from the input. So the frequencies that were attenuated most by one filter are the frequencies attenuated least by the other filter.   You could use this LTSpice setup to check this: … more …

Posted by gaussmarkov | Filed in Capacitors | 4 Comments »

 

Friday, February 23rd, 2007

Capacitors 4: Low Pass Filters

Resisting Voltage Change

Capacitors are often said “to oppose voltage change.” When the current is finite, the change in the voltage across the plates of a capacitor generally lags behind the change in the voltage of the source. Also, the shape of voltage changes affects how the capacitor charges, the resulting shape of voltage across the plates of the capacitor, and the pattern of the current through the capacitor. … more …

Posted by gaussmarkov | Filed in Capacitors | 7 Comments »

 

Friday, February 23rd, 2007

Capacitors 3: In Series and Parallel

The Capacitor “Law”

As described previously, capacitors are fundamentally different from resistors. They do not conduct DC current, but capacitors do transmit AC current because they can repeatedly accumulate and release a voltage potential like a rechargeable battery. … more …

Posted by gaussmarkov | Filed in Capacitors | 1 Comment »

 

Friday, February 23rd, 2007

Capacitors 2: DC and AC

Preliminaries

First, let’s summarize some basic electronic simplifications: electrons carry a negative charge and, therefore, repel each other. Because they can move freely within a wire, electrons will distribute themselves uniformly throughout the wire so that there is no discernible polarity along the wire. On the other hand, … more …

Posted by gaussmarkov | Filed in Capacitors | 14 Comments »

 

Friday, February 23rd, 2007

Capacitors 1: Description

Appearance

mylar capacitors

There are many kinds of capacitors and several popular ones are pictured here. Generally, capacitors have two leads. Some are axial leaded, like resistors, and others are radial leaded, with both leads at one end. Stompbox layouts … more …

Posted by gaussmarkov | Filed in Capacitors | 13 Comments »

 

Tuesday, February 20th, 2007

Ubescreamer

Ubescreamer Layout

Here is the classic ts808 (above), rendered in a new and fresh way with a CD4049 by the great folks at runoffgroove.com. See the discussion on diystompboxes.com. The link to the original schematic is here: runoffgroove.com.

Posted by gaussmarkov | Filed in Circuits | 12 Comments »

 

Wednesday, February 7th, 2007

Visual Analyzer Oscilloscope

VisualAnalyzerVisual Analyzer is a free software oscilloscope made by Sillanum Software. They describe it as “A complete professional real time software that transforms your PC into a complete set of instruments. No new hardware is necessary (you can use the Sound Card of your PC).”

Posted by gaussmarkov | Filed in Software | 5 Comments »

 

Wednesday, February 7th, 2007

DIY Layout Creator

The DIY Layout Creator is free software for laying out circuits was written with feedback from a huge crowd on Aron’s diystompboxes.com forum. One of the coolest things to happen there. And the software is superb, which explains why it is probably the most popular way to create layouts for the forum. Visit Bancika at DIY Fever.

Posted by gaussmarkov | Filed in Software | 6 Comments »

 

Tuesday, February 6th, 2007

T.M.K.

T.M.K. Layout

T.M.K. stands for “too many knobs.” 😀 Designed by Tim Escobedo, this circuit can produce a wide range of fuzzy sounds. There is a good sound clip on his site. Here’s Tim’s list of what the pots do (following the numbering on my version of the schematic):

    pot 1: feedback
    pot 2: input impedance
    pot 3: gain/color
    pot 4: crossover distortion
    pot 5: octave/fundamental blend
    pot 6: volume

At the time, I was trying out some features in this layout suggested by Chris Gregory, Mark Hammer, and Jim Rayden: ground fill, wider traces, and identifying text. And Chris Gregory <stobiepole@gmail.com> kindly wrote to say that he has verified this layout. His build is shown above.

Posted by gaussmarkov | Filed in Circuits | 12 Comments »

 

Saturday, February 3rd, 2007

Crank

Crank Layout

This is an interesting booster designed by Mark Hammer (http://hammer.ampage.org) with a double-ganged gain pot that also controls tone. See Mark’s description on his site.

Posted by gaussmarkov | Filed in Circuits | 3 Comments »

 

Tuesday, January 30th, 2007

Twenty-Two Sevenths

22-7ths Layout

Another classic pedal (the Big Muff Pi) reinterpreted with a CD4049UBE by runoffgroove.com. This is a work-in-progress. This version is a combination of revisions 1.2 and 1.3.

The schematic source is runoffgroove.com.

Posted by gaussmarkov | Filed in Circuits | 2 Comments »

 

Friday, January 26th, 2007

Overdrive 250

Overdrive 250 Layout

The DOD Overdrive 250 clone can also be used to create an MXR Distorion Plus clone. See the project’s sources: http://tonepad.com and http://www.generalguitargadgets.com.

Posted by gaussmarkov | Filed in Circuits | 24 Comments »

 

Tuesday, January 23rd, 2007

Forty-Niner

Forty-Niner Layout

Mark Hammer (http://hammer.ampage.org) also designed this pedal, another 4049 project!

Posted by gaussmarkov | Filed in Circuits | 13 Comments »