Doboz VCO340 Build

I built a pair of Doboz VCO340 VCOs. These are based around the CEM3340 chip, which was used in Yamaha DX7, Prophet and other famous synths from the 80s. Here are my notes for the build for anyone interested in…

Small Time Delay update

Small Time is a PT2399 based delay with tails by the Valve Wizard. Tails or trails if you’re not familiar allows the delay signal to continue after the effect is bypassed. Valve Wizard’s work is here. I saw the schematic…

Tremolo Matic XXII Build

The Tremolo Matic XXII (Tremolo 22) is a great sounding tremolo. This is origianlly from Stompboxology. I’ve written more about it here. I made a few changes to the original design. This latest version adds a few improvements to the…

Pedal Workshop at Noisebridge

I’m planning to host a pedal building workshop at Noisebridge. Noisebridge is a community hacker space in San Francisco. Below are my notes for this session. Welcome Why are you here? What can you build? What is a guitar pedal?…

Prototyping Guitar Pedals

This is post for anyone interested in getting started making your own guitar pedals and prototyping your own PCBs. I like making guitar pedals and synth modules. I’ve built more than a few of each. When I started, some of…

Zap Frequency #3

I’m experimenting with the Harmonic Energizer. Read more about it in my previous post. I updated the PCB with room for two pairs of clipping diodes. With this update. Using the prototyping service at PCBWay.com is a great way to…

Stone Bender #3

This sounds really good. I figured I’d build another and give to a friend, trade it, or try and sell it on Reverb. I made one of these on strip board and sold it at a swap meet. Here’s a…