PT2399 Echo Processor IC
The PT2399 is a digital integrated circuit (IC) that is used in guitar effects to produce echo and delay from 30ms to a max of 340ms.
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Guitar Pedal Electronics
The Ibanez TS9DX Modes & Their Clipping Circuits
In this article, I go through each of the TS9DX Modes and give an analysis on how they alter the Tubescreamer clipping circuit. For each Mode, I show the clipping circuit, the waveforms they produce, and a plot of their frequency response (tonal characteristic). The Ibanez TS9DX Modes – An Introduction The TS9DX has all
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An Analysis of the Ibanez TS-9 Clipping Circuit
In this article we’ll be diving into the inner workings of the TS-9 clipping circuit and peer into its method of operation one component at a time. First we’ll consider the basic skeleton upon which the Drive circuit is based – the non-inverting operational amplifier. From there we’ll exhibit the nuances of how the signal
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3 Efficient Ways to Store Resistors for DIY Guitar Effects
There are two main concerns for storing components: space and time. We want to save space so our work area isn’t so cluttered. We want to save time when searching for the proper component value or during clean-up. In this article we’ll cover a few ways to store resistors for working with DIY guitar effects.
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EHX LPB-1 Circuit Overview
Whether you’re a DIY enthusiast looking to build your own LPB-1 clone or just curious about it’s inner workings, this article highlights valuable insights that you can take away and put into practice. We’ll take you on a deep dive into the design of this classic booster circuit, exploring its components, topology, and technical characteristics.
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Circuit 7 of 48: The Indicator
By: Dominic Sciarrino | Stompbox Electronics | Last Updated: March 22nd, 2026 Almost every guitar effects pedal ever made has one thing in common: an indicator LED that tells you whether the effect is engaged or bypassed. The indicator LED circuit is one resistor and one LED: the simplest circuit in this series. But get
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The BOSS VB-2 LFO Circuit
In this post, we dissect what makes the BOSS VB-2 LFO circuit so unique. It doesn’t “fit in” with other oscillator circuits like relaxation oscillators, phase-shift oscillators, and Wein-Bridges. Read on for an in-depth look at modeling the VB-2’s LFO circuit, examining it’s behavior, and how we can modify it to suit our needs. The
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The Definitive Guide to Rehousing a Behringer Pedal
To get more sturdiness and reliability out of a Behringer pedal, you may opt to rehouse it into a more robust enclosure. The following is a guide for rehousing a Behringer pedal, using the UV300 Ultra Vibrato as an example. Why Rehouse a Behringer Pedal? Access “Inaccessible” Tones Many Behringer pedals are based on circuits
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Circuit 5 of 48: The Switched Jack
Guitar pedal battery switching, DC power disconnect, and expression pedal wiring explained Introduction Switches: the most engaging electromechanical component! Available in all sorts of shapes, sizes, and configurations – switches give us the ability to interact with the electronic world. In this post, we’ll be covering a very particular type of switch technology that will
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Circuit 8 of 48: The Power Supply
By: Dominic Sciarrino | Stompbox Electronics | Last Updated: March 22nd, 2026 Every component in a guitar effects pedal depends on a clean, stable DC voltage to function correctly. The power supply is where that voltage comes from, and understanding it from a design perspective is one of the most important foundations in effects pedal
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