Questions tagged [guitar-pedal]

Electronics circuits design for guitar pedals

Filter by
Sorted by
Tagged with
1
vote
3answers
163 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
93 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
90 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
382 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
775 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
228 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
543 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
165 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
280 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
303 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
1k 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
1k 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
1k 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
232 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
563 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
493 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 ...
2
votes
1answer
709 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
417 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 ...
2
votes
2answers
277 views

viability of idea for low voltage signal clipping (distortion) for guitar effect

I want to create an guitar distortion effect. What I want is a unity gain buffer op-amp that clips the signal. In the drawing below there is a circuit found on this forum here which will clip a very ...
0
votes
3answers
1k views

How can I test guitar effects box without a guitar?

I want to play around with guitar effects circuits on a breadboard, but I don't have a guitar. How can I test my circuits without a guitar?
1
vote
1answer
211 views

How to control the amplification of a Transistor? [closed]

I'm currently building a very simple overdrive/distortion pedal using a 2N5089 transistor. I want to be able to have a potentiometer control the "drive" which I assume is the voltage amplification. ...
0
votes
3answers
2k views

Running preamp tube filament on 5v?

Is it safe and not harmful to run a preamp tube filaments at 5v? The tube is ECC85. I built a tube preamp in a DIY portable guitar amp. It's very similar to Matsumins valvecaster with a few slight ...
0
votes
1answer
42 views

How to 'simulate' an input device?

I made a diy guitar amplifier with two seperate amplifiers. When potentiometer is raised something strange and annoying begins - various whispers, noises and reacts really strange. HOWEVER this never ...
2
votes
3answers
2k views

Is there any real world difference in upgrading TL071 to OPA314?

I have a DIY made guitar amp in which there is a TL071 preamp section. I read various opinions about how upgrading op amp improves that sound and how it doesn't do anything really... I'm quite ...
0
votes
1answer
877 views

Will this circuit (for a guitar effects pedal) work?

I am a newbie at electronics and am trying to make a fuzz/distortion pedal. This is a schematic I have made My understanding is that the more resistance the more gain so there is a minimum of 100 KΩ ...
1
vote
1answer
159 views

Pass line level signal through electric guitar

I have an idea for a project where I want to pass a line level signal through my electric guitar. The idea is to have a 3.5mm jack input on my guitar, to which I can input a line level signal. Then ...
2
votes
3answers
1k views

My (single ended, class A) tube amp sounds great while it's shutting off. What's happening?

So, I have guitar direct in to a single-ended class A (12AX7 and 6V6) Champ-style amp. The amp is from the 60s and unbranded, it's likely a Pepco (Pine Electronics) Silvertone style circuit. It's been ...
0
votes
1answer
274 views

Do I need to decouple an LM386 if it is run from a battery? [duplicate]

What I would like to do is to put an LM386 in my bass guitar so that I can plug my headphones directly into it for practice. The LM386 was my first choice because it can run off of a 9V battery and ...
1
vote
1answer
129 views

Dynamic Range Compressor Pedal Operation

A Dynamic Range Compressor works by "clamping" an incoming signal. Above a certain input threshold, the gain of the device is reduced to a lower level. This has the effect of making quieter sounds ...
0
votes
2answers
198 views

rotary encoder, got a 20ppr but need more like 200 ppr [closed]

I'm a tinkerer who is attempting to turn a guitar pedal into a remote tempo control for a drum machine, which uses a rotary encoder. In place of the potentiometer in the guitar pedal, I have put in a ...
0
votes
3answers
946 views

Why are two diodes used here?

I'm following the wiring diagram for a digitech fs3x guitar pedal footswitch. For the third SPST switch, it's wired from the other two switches connected by 2 diodes, both in the same direction. Can ...
0
votes
1answer
936 views

LM386 noise when using 5v power supply

I'm using LM386 with my guitar and currently I power it with 9v battery but now I want to switch to 5v power supply because I don't want to use a battery. I want to use a 5v usb wall charger + ...
1
vote
1answer
1k views

What is wrong with my guitar amp?

I found this 1W guitar amp design on the Internet: http://www.diale.org/punch.html And I am trying to build it on the protoboard. I could not find the IC TDA7052, instead I've got the a TDA7052B. ...
0
votes
3answers
11k views

Impedance matching for a guitar pedal

So it's me working on a pedal again. I would like to add some equalizer effects on the pedal and found a fascinating circuit "Smash Drive": As far as I know, maximum power with lowest effect is ...
0
votes
4answers
3k views

Making a Distortion Pedal

I was breadboarding a pedal for my guitar using LM386. I read that as long as the gain is too large, the output signal is clipped to produce a distortion effect. So I simply tune up gain pot between ...
0
votes
1answer
868 views

Transistor switching noise problem (Guitar pedal idea troubleshooting)

Have a simple circuit : i want to create a gated effect that cuts signal in and out .. it works but i can hear the switching sound of square wave generated by arduino through my amp speaker .. (...
1
vote
0answers
595 views

How to calculate voltages on guitar fuzz circuit with pnp and npn transistors?

I have built this circuit on a veroboard, and it seems to me that it has been wired correctly. I do however get a very low output from the circuit, approx 1/2 to 1/3 of the input signal. I reckon that ...
1
vote
3answers
5k views

Audio Signal Switching - “DPDT switch vs. 4066”

I've got a signal coming from an electric guitar and I need to switch it. Basically it's a distortion circuit. I need to switch between the distortion and clean (directly connected to the output) My ...
1
vote
1answer
845 views

Safely shutting down 19V mini PC when power fails

I am adding an Intel NUC (4"x4" i5 PC, 12-19V, 10A@19V) to my guitar effect pedalboard for all kinds of fun signal processing with Ableton Live and Max/Msp. I'm building a 12V 20A power supply using ...
0
votes
1answer
511 views

Identifying a broken Rotary Encoder on guitar foot pedal

I have a guitar foot pedal, "EHX Stereo Memory Man with Hazarai", with a rotary encoder that broke off. Here is a picture of the knob in question: Also, here is a picture of the circuit board, ...
2
votes
1answer
391 views

Routing Audio Ground - needed or not?

I'm trying to build a guitar pedal switcher (efectively a box that provides multiple effect loops that can be independently bypassed from a single microprocessor) and while building a working ...
2
votes
2answers
2k views

Why does this circuit use a transistor buffer even though there is an high input impedance op amp afterwards?

Regarding this circuit I found on www.geofex.com detailing the famous Tube Screamer guitar pedal (source: geofex.com) I don't understand the purpose of the BJT input emitter follower transistor. ...

1
2