Build your
Music Techknowledgy

with Professional Teacher, Electronics Hobbyist and Avid Certified Instructor, Stu Welsh.

“Thank you so much for these videos.  You’re a natural teacher and give some exceptional explanations[…] With your videos, I come away understanding why these circuits are designed the way they are and that is infinitely more empowering.”

AT via YouTube

Got my first pedal kit, random parts and breadboard on order, so looking forward to diving in. No doubt will be referring back to your video(s) – just the right balance of theoretical and practical.

ML via YouTube

This was perfect for someone like me who only recently started learning about guitar pedal electronics. Clearly explained and easy to follow – thank you!

BE via YouTube

The best tutorial to learn audio electronics. please continue with the work of education. Thank you.

EMF via YouTube

Excellent, really well explained, just what I was looking for. Thanks.

OD via YouTube

Fantastic walk-through! Very concise too. I thoroughly enjoyed the video. Looking forward to more. Subscribed!

CDTD via YouTube

The operational amplifier circuit is perfectly elaborated. I really appreciate your approach to the video, that you pay attention to the focus of the breadboard object as well as the drawings during the presentation.

MS via YouTube

These videos are very good. Are you a professional teacher? With your help, I made my first working circuit yesterday. Thanks!

rm2 via YouTube

I also build my own pedals (since 6 years now) and your videos are the best, if not the only proper ones, explanation of the process I came across on YouTube… Excellent work.

FLCGLA via YouTube

One of the best practical videos I’ve seen – thanks.

YA via YouTube


This video examines the operation of the Adjustable Sawtooth Generator you often see in my videos.

The video features a breakdown each sub circuit using both a circuit simulator software and components on a breadboard in the lab.

In approaching it this way we are introduced to several circuit building blocks, content current sources, capacitor charging, a diode switch, and a comparator with hysteresis.

Latest Post

Oscilloscope Music

Recently, the Telequipment D66a vintage analogue Cathode Ray Tube (CRT) Oscilloscope has been pressed into service using X-Y mode to curve trace transistors, diodes, capacitors, etc. The patterns this creates on the screen are named Lissajous or Bowditch curves, named...

More Posts

Guitar Pedal Switching – Part 1

This is the first in a series of videos where we look at the processes involved in making a Guitar FX Pedals. Here we explore some of the more common types of bypass switching found in Guitar FX pedals. Starting with a look at basic switches, switching circuits and...

Adjustable Sawtooth Generator

Here we explore the operation of the Adjustable Sawtooth Generator you often see in my videos.
We learn about constant current sources, capacitor charging, diode switches, comparator circuits and hysteresis.

Clean Boost Circuit Improvements

In this article, we examine improvements we can make to a simple Op Amp Clean Boost circuit to make it more suitable for commercial production.

Clean Boost Guitar Pedal Series

In this series we start by building a build a Clean Boost circuit for Electric Guitar, we troubleshoot any issues before moving on to modifying the circuit by adding soft and hard clipping diodes before looking as the area of the circuit that we can improve using a better power section and by employing filters to address noise and frequency response.  This series will continue duirng 2023 with several more parts including implementing a tone circuit, adding gain & volume controls, and finally designing a PCB.

Part 1 – Building a Clean Boost Guitar Pedal Circuit

Part 2 – Troubleshooting a Clean Boost Guitar Pedal Circuit

Part 3 – Modifying a Clean Boost Guitar Pedal Circuit

Part 4 – Improving a Clean Boost Guitar Pedal Circuit