Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [guitar-pedal]

Electronics circuits design for guitar pedals

Guitar Pedals are devices used to treat the sound signal from an electric guitar, in order to create different sound effects. This can be achieved through analog and digital means.

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Why NPN and PNP in parallel in this distortion pedal circuit?

I've come across a guitar pedal circuit called a "Tube Sound Overdrive". The schematic is shown below. It looks like a typical common emitter transistor circuit with an adjustable bias (RV1), except there are two transistors, NPN and PNP in…
Dave H.
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Please help me debug my circuit

I am trying to build a guitar pedal but am unfortunately failing. I have about a high school physics understanding of electronic circuits, but the readings I am getting seem impossible to me. I might obviously be measuring wrong, or I might have a…
Linus
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What does this circuit symbol mean?

I'm a student who is trying to build a wah pedal for a guitar. I came across this diagram for how to wire the circuit (from this site) : Within the diagram, I am not sure what the following symbol means: This variant of the symbol also appears in…
Darth Vader
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Stompbox not working

Today I've soldered my clone of ZVEX Wooly Mammoth and when I started testing, it didn't give a sound. Hours of visual and multimeter inspections gave me no clue about a mistake. So, I appreciate any help given about how to detect possible problem.…
Glebzex
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Reasons for choosing a transistor instead of an op-amp as a buffer

I have often seen circuits for guitar pedals that use an emitter-follower configuration as the input and output buffer (see example below). If an op-amp can provide a greater input impedance / lower output impedance, why are they not used…
Chris-Al
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Overdrive guitar pedal sounds better without a clipping diode

I built a guitar pedal which looks like this (the schematic is a clone of a Tube Screamer) and I have a question regarding something unusual I discovered. There are two diodes, D1 and D2, which provide soft clipping. It turns out that removing one…
Max Walczak
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Need help designing and implementing an op-amp based distortion circuit

I've been attempting to design a distortion pedal for use with my bass guitar and amplifier. The simulations in LTspice were promising, I moved to implement it and, in short, it did not work. Note: The amplifier used in the circuit is merely…
Alex
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Single supply non-inverting amplifier using op amp

I'm working on building a distortion guitar effect pedal for an analog electronics class I'm taking. I am struggling with building an amplifying circuit using an op amp (we just began learning about them), and I'm hoping I could get some tips.…
Orange Soda7988
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Eliminating the humming noise from a cheap SMPS

I am trying to build a power supply unit that powers eight 9V guitar pedals (usually pedals consume 10-100mA). So, I thought I'd buy 8 cheap 9V-1A SMPS adapters and probably fix some bypass capacitors at the output to remove the ripples. This would…
Bivek Parajuli
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I am rewiring my old guitar and I need help with the potentiometers

Is it possible to convert a 250 kΩ potentiometer to 500 kΩ or a 500 kΩ stereo potentiometer to mono? I am finding it difficult to locate a 500 kΩ mono potentiometer.
Ocean Man
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Simple fuzz pedal using breadboard

Complete newbie here. I've been trying to reproduce a simple fuzz pedal using breadboard. Here is the scheme: And here is the current state of my breadboard: The only sound I hear is white noise like "jack cable sound". What am I doing wrong? I…
n1stre
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Does anyone know how the low tone control of the Boss Metalzone works?

https://electricdruid.net/boss-mt-2-metal-zone-pedal-analysis/ https://sound-au.com/articles/gyrator-filters.htm#s9 I have been using these websites to try and work out how the eq works, but I've had a bit of a problem when it comes to the gyrator…
OscarM
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Opamp Design for Low Impedance Sources?

I am terribly confused ... I tried myself at building a low impedance guitar pickup some time ago. Quick LowZ Pickup Intro Basically just two loops of aluminium with two magnets, a humbucking guitar pickup with a single loop per magnet. The three…
fho
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Capacitor into resistor to ground

I recently started learning electronics on my own due to interest in audio effects because I play guitar so: I thought I'd start out with distortion pedals, they seemed the simplest to begin with. The schematic below is from a clone of the famous…
Nook
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Original cry baby wah wah analysis

I have been given to understand the original crybaby wah schematics. But I can barely understand anything regarding the circuit itself! Any kind of suggestion and help from anyone would be very helpful. If the question needs…
Hilton Khadka
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