Simple PWM Filter PCB Build Guide

Here are the build notes for my Simple PWM Filter PCB Design. Below you can see it connected to my Pico Touch Board. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! If you are new to electronics and microcontrollers, see the Getting … Continue reading Simple PWM Filter PCB Build Guide →

Simple PWM Filter PCB Design

Having spent a bit of time attempting (although I'm not sure I'm succeeding yet) to understand how to get a useful filter for my Pico Touch Board Audio, I thought it would be useful to have a simple template PCB that could be used for a range of PWM low-pass filtering options. This is my design. … Continue reading Simple PWM Filter PCB Design →

Pico Touch Board Audio

I wanted to go back to my Pico Touch Board PCB Design and see if there was a way to make it more stand-alone. The original design was to make it a MIDI controller, but that isn't the only option. https://makertube.net/w/tADSyrPrUdR1mx7yKRXZTC Warning! I strongly recommend using old or second hand equipment for your experiments. I am … Continue reading Pico Touch Board Audio →

ESP32 S3 DevKit Experimenter PCB Build Guide

Here are the build notes for my ESP32 S3 DevKit Experimenter PCB Design. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! If you are new to electronics and microcontrollers, see the Getting Started pages. Bill of Materials ESP32S3 DevKit Experimenter PCB (GitHub … Continue reading ESP32 S3 DevKit Experimenter PCB Build Guide →

ESP32 S3 DevKit Experimenter PCB Design

This a version of the ESP32 WROOM Mozzi Experimenter PCB for the latest ESP32-S3 DevKitC board I've found. For the background on the boards themselves, see my notes here: ESP32 S3 DevKit. ESP32 S3 DevKit Experimenter PCB Build Guide Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible … Continue reading ESP32 S3 DevKit Experimenter PCB Design →

Arduino Pro Mini MIDI USB CV PCB Build Guide

Here are the build notes for my Arduino Pro Mini MIDI USB CV PCB Design. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! If you are new to electronics and microcontrollers, see the Getting Started pages. Bill of Materials Arduino Pro Mini … Continue reading Arduino Pro Mini MIDI USB CV PCB Build Guide →

ESP32 and PWM – Part 3

I'm continuing my look into the ESP32 and PWM. This time I'm adding in some analog control to introduce an element of frequency modulation to the synthesis. Part 1 - All the theory and research around PWM and the ESP32. Part 2 - Generating different waveforms on multiple channels. Part 3 - Introducing analog control and frequency … Continue reading ESP32 and PWM – Part 3 →

ESP32 and PWM – Part 2

In this second part of my look into the ESP32 and PWM I've updated the code to expand to several channels to make a sort of (fixed) simple signal generator. Part 1 - All the theory and research around PWM and the ESP32. Part 2 - Generating different waveforms on multiple channels. Part 3 - Introducing analog … Continue reading ESP32 and PWM – Part 2 →

ESP32 and PWM

I'm continuing reinventing wheels with my ESP32. In ESP32 and Mozzi I was using the built-in DAC for audio output. In this post I'm taking a detailed look at how to use PWM for audio output instead. Part 1 - All the theory and research around PWM and the ESP32. Part 2 - Generating different waveforms on … Continue reading ESP32 and PWM →

Arduino Direct Digital (Additive) Synthesis

This is actually a collection of previous projects with the code tidied up a little and combined to show a single sketch that can be configured for either PWM, an R2R ladder or the MCP4725 I2C DAC. There isn't really anything here that hasn't been talked about before somewhere, but hopefully this can act as … Continue reading Arduino Direct Digital (Additive) Synthesis →