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Questions tagged [guitar-pedal]

Electronics circuits design for guitar pedals

2
votes
3answers
91 views

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 ...
0
votes
1answer
68 views

How to measure the output impedance of a valve preamp?

I was trying to measure the output impedance of a DIY preamp for the past couple of days without any luck. Each time, I got to the same result of around 3K3 ohm, which is unbelievably low. This is ...
4
votes
2answers
1k views

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 ...
0
votes
0answers
58 views

Focusing on Frequencies with Guitar Pedal Capacitors

I just built my first guitar pedal (a Bazz Fuss fuzz pedal), and now I'm messing around with the electronics a little bit. I was just wondering how I could target specific frequencies with the pedal. ...
1
vote
1answer
47 views

Can I use network cable for low voltage DC power?

I'm a guitar player with a crazy idea for a 2 part bypass looper: Enclosure A is just big enough to house 4 footswitches and an ethernet jack. Enclosure B has 9V DPDT relays to route audio ins and ...
0
votes
0answers
88 views

Help identifying a variable resistor's function

I have recently acquired a TC Electronics Tube Pilot guitar effect pedal. While exchanging the vacuum tube in it, I noticed that there was a 22k ohm variable resistor on the board. Can anybody tell ...
1
vote
0answers
107 views

How to make a guitar amp switcher?

So I'm trying to build a guitar amp switcher (and I don't really know what I'm doing =)). The idea is that guitar out is connected to X4 jack and then switched to either X1, X2 or X3 jack, which ...
0
votes
1answer
45 views

Basic circuit to turn on LED when input detects signal (for guitar)

I'm looking for a basic circuit snipping which can either turn on an LED or give a positive voltage when input signal from a guitar is detected. Basically, I have an existing circuit where an effect (...
0
votes
3answers
205 views

How to get +6V and -6V out of 12V PSU [duplicate]

I am designing a guitar pedal using OpAmps, and i need to feed them with +6V and -6V (beucase the musical signal is senoidal centered in 0V). I need to use a 12V DC PSU for the pedal, and i need to ...
0
votes
2answers
148 views

Ticking noise from guitar pedal attempt

I am working on a tremolo guitar pedal circuit. A tremolo pedal basically attenuates the guitar signal using a pattern. Most tremolos use a combination of LEDs and LDRs to do this, but since I do not ...
0
votes
1answer
75 views

Does anyone know how the Boss Metalzone sweepable mids affect the bandpass?

https://electricdruid.net/boss-mt-2-metal-zone-pedal-analysis/ http://sound.whsites.net/project150.htm Like in the original question - I'm struggling to understand the relationship between the op-amp ...
2
votes
2answers
55 views

Does anyone know how the low tone control of the Boss Metalzone works?

https://electricdruid.net/boss-mt-2-metal-zone-pedal-analysis/ http://sound.whsites.net/articles/gyrator-filters.htm#s9 I have been using these websites to try and work out how the eq works, but I'...
1
vote
1answer
50 views

Low Voltage AC as power source for Audio Equipment?

When might an AC (not DC) voltage be used as a power source for an audio device - most every guitar pedal I've ever owned converted line voltage - 120VAC to some lower DC voltage - often 9v or 12v DC. ...
2
votes
1answer
469 views

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 ...
1
vote
3answers
417 views

Guitar pedal input stage buffer

In the below schematic for the Tube Screamer guitar pedal input buffer, there is a 1k resistor (R1) after the coupling capacitor (C1). What is the purpose of this resistor? It has no effect on the DC ...
1
vote
1answer
139 views

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 ...
0
votes
1answer
107 views

MOSFET analog switch, Transmission Gate, Bilateral switch circuit questions

Below is an LTSpice simulation of two attempts at a Mosfet bilateral switch or 'transmission gate'. The plot shows the switch (onoff) going from 0 to 5v (in blue) and a sine wave audio signal being ...
0
votes
1answer
69 views

EHX LPB1 circuit not working

I am very new to making circuits and have tried to make an EHX LPB1 circuit: When powered and plugged in, the 9v battery overheats and all I can hear in my amplifier is static noises and no output. ...
2
votes
1answer
161 views

Audio Transformer output straight into an opamp?

Below is a circuit I'm working on. It's a guitar input buffer featuring transformer isolation. The transformer I'm using is pretty expensive and should be fairly linear, but I decided to add a graphic ...
0
votes
1answer
77 views

Can I use a capacitor which has 275v +-10% tolerance in a 9V circuit?

I am trying to get parts for a circuit i want to make and I'm very new at making circuits. As a result i'm unsure if i can use a 150nF capacitor with 275v+-10% tolerance in the following circuit or ...
0
votes
2answers
113 views

What does this RC network do in this audio transformer output stage?

This is a relatively well known ABY circuit available on the internet. CLICK HERE, REMOVED IMAGE FOR COPYRIGHT REASONS I have two questions about this circuit : 1) What does the RC network (in the ...
1
vote
1answer
328 views

Guitar signal with opamp boost

Hi just having some issues understanding what's happening with my opamp circuit. Vin is a Sine wave at 1kHz and VG is 4.5V. From what I understand this circuit should boost the signal I provide it ...
2
votes
1answer
88 views

Why does a Pull down resistor not affect AC

I've been reading up and trying to learn about Guitar Pedal circuits. I have a very basic question about how a Pull Down resistor is used at the beginning and end of a circuit to avoid a popping ...
2
votes
2answers
135 views

Digital Audio Effects Design [closed]

I've recently graduated university with an MEng degree in Electrical and Electronic Engineering. As a third year project, I've used an ST-Microelectronics ARM Cortex-M4 based Nucleo microcontroller ...
0
votes
1answer
122 views

Guitar Dual Volume Control Not Working Correctly

I'm not sure if this is the correct place to ask this, please notify me if there is a better place. I have just created my first guitar pedal and thought i would go simple with a basic passive ...
-1
votes
1answer
2k views

Can I plug a 12v DC in to a 9v Pedal? [closed]

pretty much as the title goes.. is it okay to plug an 12v DC power supply to 9v pedal? Power Supply >> Voodoo Lab ISO-5's Manual for reference Pedal >> ADA GCS-5's Manual for reference p.s deeply ...
1
vote
1answer
63 views

Where to include Stomp Switch on this Boost Pedal Schematic?

I'm new to electronics and I am having trouble figuring out this schematic. I understand the circuit but I do not see where the foot switch would come into play and or would be connected. Any help ...
1
vote
1answer
515 views

Headphone amplifier for guitar with stereo MP3 input - mixing

I'm building a practice amplifier for my girlfriend who is learning to play the bass guitar. I'm a reasonably experienced electronics builder so building something to plug a guitar and headphones into ...
3
votes
3answers
386 views

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. ...
5
votes
1answer
2k views

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 ...
-1
votes
4answers
252 views

How does the power switch of an active noise canceling headphone work? [closed]

I have a noise cancelling headphone that still works as a passive headphone when turned off, even with the battery removed. How does this work? In my mind noise cancelling is basically adding ...
1
vote
3answers
129 views

How to determine what capacitance is required for eliminating humming noise?

I've got power supply (transformer based) 9V powering modelling guitar effect processor. That noise gets amplified and it hurts. Humming noise is 100Hz rectified mains. Processor takes 300mA 9V (...
1
vote
1answer
86 views

Sound amplification

A few months ago I built myself a cigarbox guitar. I built all myself, including the pickup and I have wired it with a volume potentiometer and a jack output. It works well but I have to use a pedal ...
0
votes
1answer
68 views

What sort of switch to swap the order of two signal processors in series

I'm building a guitar effects processor which is a 2-in-1 effect. Basically they're two separate circuits I've already built on perfboard which I want to put in the same box. I haven't decided which ...
0
votes
1answer
261 views

Connecting a DIY guitar pedal to a pedalboards power supply

I am new to electronics and I am trying to build a DIY Fuzz Pedal. Before I construct it, I am trying to figure out how to use my pedal board's power supply with it instead of using a 9 volt battery. ...
0
votes
1answer
454 views

Kill Switch schematic

I want to make a kill-switch pedal with on/off LEDs for my guitar. I tested a simple schematic but every time I ground the circuit like the schematic i put below i get an error: voltage source/...
0
votes
1answer
171 views

Guitar pedal effect voltage problem

I'm building a big muff pi, here it is my schematic : I also made the PCB with smd components, and all the connections seem to be correct. I've plugged in the guitar but nothing happened, no sound at ...
0
votes
2answers
398 views

Female mono jack connector 6.3mm

I'm building a DIY pedal effect for my electric guitar and I have to connect the input and output jack connector, but I don't know how to do it. The connectors have 3 pins, one is the tip which it is ...
0
votes
0answers
121 views

Sallen Key filter for audio applications (guitar)

I am building a custom guitar effects pedal. This is a digital pedal where the microcontroller handles all the effects. The guitar signal enters the silicon domain through the ADCs , the effect is ...
1
vote
1answer
185 views

Op-Amp circuit: Check understanding

Please check my understanding of the components in the following guitar pedal audio circuit and elaborate/ fill in missing knowledge where necessary. Left of the op-amp inputs R1 & C1 presents ...
0
votes
0answers
269 views

Unity Gain Clipping Circuit

Please see the image below: This is an idea for a unity gain clipping circuit to be used in a guitar effects unit as a 'distortion' pedal. Some percentage of a peak detector output voltage feeds ...
3
votes
1answer
873 views

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 ...
1
vote
1answer
950 views

Soft diode clipping for 'controlling' amplifier levels and avoiding harsh distortion

The title might be misleading/confusing. I'm building an amplifier with TDA2003 IC's which could be both suitable as a guitar amplifier and as a music amp. Where diodes come into this circuit? As ...
1
vote
1answer
774 views

Switching capacitors in a guitar effects pedal

I've built a linear power booster - schematic here: http://pedalparts.co.uk/docs/LPB-V3.pdf I did it on veroboard: You'll note that it gives you the option of having different capacitor values to ...
1
vote
1answer
188 views

How To Eliminate Amplifier Squeal When PreAmp Power is Turned Off

I have a bass guitar that has a built-in pre amp, which is switched ON whenever the cable is plugged into the bass. I typically use the bass all day, and leave the amp on and the bass plugged in - ...
7
votes
1answer
519 views

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 ...
1
vote
2answers
2k views

Guitar signal input to Arduino UNO ADC - alternative part for TL972 op-amp

I'm trying to make a guitar pedal with atmega328 in Arduino but I've had trouble with input stage. I found this circuit from electrosmash.com, but I can't find the TL972. Are there any replacement for ...
0
votes
3answers
384 views

Voltage gated switch issues for audio application (guitar pedal)

So i'm a newbie, and with the assistance of my A-Level in electronics step brother we're trying to make a tremolo pedal for guitar. The concept is that an opamp (powered by ±9v) is used as a square ...
1
vote
1answer
542 views

Help Needed with Voltage Controlled Synth Circuit

I am building a somewhat out-of-the-ordinary guitar pedal that involves some synth elements, namely controlled voltage. I'm a little confused by something that I suspect is actually pretty basic. I ...
1
vote
1answer
309 views

Circuit step-by-step check

I've soldered a stompbox for guitar and stuck into having no sound on the output. Visually I checked everything about the soldering and it seems good. As I am not so good at electronics I wish getting ...