EAGLE is dead, long live KiCad! (Gauss Markov Library included)

EAGLE is flying away... and has been unavailable since June 2026.

If you have been following Coda Effects for a while, you know that I use EAGLE to design my PCBs. What is EAGLE? It is (or was 😭) the Electronic Design Automation (EDA) software of choice for the DIY pedal community.

I still have some unfinished projects that won't ever see the light of day in Eagle…

The software was released in 1988 and went through several versions, the latest being the 9.6.2 released in 2020. Today, after June 2026, it is the end of this legendary software.

Multimeter: how to use it with DIY guitar pedals

If you have already made guitar pedals, you know that my rule is "It NEVER works at the first attempt"!

This can be very frustrating sometimes, and even if debugging can work easily or if an audio probe can sometimes do the trick, you can end up stucked with a non working guitar pedal.

If you are in that case, it's time for the multimeter to come into play and to become your best friend!

How to build your first DIY guitar pedal (step by step tutorial)

You have never made a guitar pedal before? You are a bit lost and do not know where to start?

Here is the perfect place! I decided to write a full tutorial for beginners, to build an Earthquaker Device Acapulco Gold, step by step. No excuse not to get started!

The Acapulco Gold is a simple, yet very fun pedal to play with, and is perfect for beginners. The circuit is simple and easy to mod as well. With this tutorial, you should be able to build your first guitar pedal!

If everything goes well, you should get a guitar pedal like this in the end:

Strymon Favorite Switch DIY

I love my El Capistan from Strymon. It is a great tape delay, with a lot of features to adjust the sound exactly how you want it. Great ambient sounds, rhythmic delay or something subtler for solos...

2026 Update: This guide has been fully revised! Everything has been updated to ensure you have access to the best current resources for your build.

What was missing was just a way to save settings and have presets like on many delays (TC Electronic Flashback, Line6 DL4, Timeline...)

I looked into the Strymon Favorite Switch, but it was a bit expensive for me, and unfortunately impossible to find used... As I read that the Favorite Switch was super easy to build, I searched a bit on the Internet, and it REALLY is extremely simple!

 Warning! This favorite switch only works with the v1 version of the Strymon El Capistan range. I have not tested it with the v2 version that came out in 2022 that uses a different digital system.

Here is a simple schematic for it:

Schematic. Most simple and useful scheme in the world!

All you need to know about capacitors in guitar pedals

Lets continue the series about electronics components you will find in guitar pedals and how they work. Last time we spoke about resistors and role of potentiometers. Time for the second most common component of guitar pedals: the capacitor!

What tools do you need to make DIY guitar pedals?

When I decided to make my own DIY guitar effects, I was totally lost about the tools that I needed: what do I need to build guitar effects? How much does a good soldering iron cost? And what is a good soldering iron? Where can I buy all that?

In this post, I will try to answer all these questions that we ask ourselves when starting. Lets focus on tools! 🛠️

(My bench. It is almost never that clean haha!)

Tutorial: how to prototype with a breadboard

Prototyping is not always an easy task with guitar pedals. One solution is to heavily mod an existing pedal. But what if you want to start from scratch? How to test things before designing a circuit and solder everything?

Well, we have a simple solution for that: using a breadboard!

Let's go! In this blog post, we'll see why the breadboard is such a cool tool and how you can use it to design and test your own circuits.

Make your own DIY power supply: yay or nay?

Let's be honest: buying a power supply is not the funniest thing ever.

It is quite expensive (and I have to admit that I would have prefered to add another fuzz that I do not need a nice pedal to my pedalboard than a power supply! 😁) and differences between the several models on the market is not very obvious...

So I asked myself: is it possible to make a DIY power supply?

In this blog post, I will explain how a power supply work, what are the good criterias to choose one from an electronics point of view and if it is a good idea to make one yourself. Let's go!

JHS Superbolt clone PCB and the missing JFETs

Hello solderers and pedal maniacs!

Here is my last build: a JHS SuperBolt clone! As you may know, I have already did a clone of this pedal, but I have finally designed a PCB for it!

Here are some pictures:

 

Why I publish my circuits schematics (and why you should do the same!)

When I made my first commercially available pedals, I chose to publish the circuit schematic online. Transparency always has been a missing thing in the guitar pedal marketing world, so it was a very natural move for me.

However, when I spoke about it with friends or colleagues, they all said to me: "why would you do this? You undermine your business by publishing everything!"

So here are my answers about why I think being transparent is a must when making guitar pedals, and why I think you should do the same if you build guitar pedals.

The different types of diodes

There is a very common marketing point that we see all the time with "boutique" guitar pedals: the famous vintage ultra-rare licorn-made type of diodes! Germanium diodes are often associated with a vintage and warm tone, whereas silicium diode sound harsher and fuzzier...

Time for a blog post about it!

What is a diode? How do they work? Which one should I use when making guitar effects?

Univox Superfuzz (from the 70s): history

People say that I worship the Univox Superfuzz a bit too much, but they are wrong. If I could, I would already have started a sect about this pedal!

It is simply my favorite pedal of all times! First because of its amazingly cool look with the huge "Super Fuzz" rubber pad, and also for its sound that is crazy loud and heavy. Seriously, best-fuzz-out-there!

After seeing Fu Manchu live in March, I could not resist buying one. After selling a kidney on the black market, I was quite lucky because I found a non-working unit on ebay that I could repair by replacing a few electrolytic capacitors.

The Super Fuzz is really the ultimate fuzz for me, so I decided to honor it by writing the most complete article about it. Here is the first part!

Let's go!