Author: Kevin

Just another soul meandering my way around the Internet ...

Atari 2600 Controller Shield PCB Design

This is an Arduino Uno shield format PCB for hooking up two Atari 2600 style controllers to an Arduino. Note: this iteration of the design doesn't really do the paddles very well, but it works fine for joysticks and keypad controllers. Atari 2600 Controller Shield PCB Build Guide There are some updates here: Atari 2600 Controller … Continue reading Atari 2600 Controller Shield PCB Design →

picoDexed + MiniDexed EuroRack

Since attempting my picoDexed + StackyPi + MiniDexed EuroRack build and failing, I've found another Pico-to-Zero board that is provided as open source, so I've had some made. This post details how to get that running with my MiniDexed Zero Eurorack module. Warning! I strongly recommend using old or second hand equipment for your experiments.  I … Continue reading picoDexed + MiniDexed EuroRack →

Duppa I2C MIDI Controller 3D Print Case

This is a simple 3D printed case for my Duppa I2C MIDI Controller PCB. https://makertube.net/w/nf7u1sYBRRzj2TUBRduQC2 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 microcontrollers, see the Getting Started pages. Parts list Duppa I2C MIDI Controller USB-C … Continue reading Duppa I2C MIDI Controller 3D Print Case →

Duppa I2C MIDI Controller PCB Build Guide

Here are the build notes for my Duppa I2C MIDI Controller PCB. 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 microcontrollers, see the Getting Started pages. Bill of Materials Duppa I2C MIDI Controller PCB (GitHub link … Continue reading Duppa I2C MIDI Controller PCB Build Guide →

Duppa I2C MIDI Controller PCB Design

This is the design for a simple carrier PCB for a Waveshare Zero format microcontroller and a Duppa small LED Ring. It is essentially a PCB version of Duppa I2C MIDI Controller – Part 4. Duppa I2C MIDI Controller PCB Build Guide Duppa I2C MIDI Controller 3D Print Case Warning! I strongly recommend using old or second hand … Continue reading Duppa I2C MIDI Controller PCB Design →

Diagnosing and attempting to fix a Yamaha DX100 – Part 3

At the end of part 1, I've established that the basics all seem ok (PCB, interconnections, power) and that basic digital logic stuff is happening. In part 2 I checked the ROM, reflowed a number of the solder joints, and started to look at the connectors between the main PCB and the LCD, but still with … Continue reading Diagnosing and attempting to fix a Yamaha DX100 – Part 3 →

picoDexed + StackyPi + MiniDexed EuroRack

Now that I have a picoDexed with a display an encoder it is very tempting to create a version of my MiniDexed EuroRack PCB for it. But as a short diversion, there is another possibility - can I use a RP2040 that is already in a Pi Zero form factor with my existing MiniDexed EuroRack … Continue reading picoDexed + StackyPi + MiniDexed EuroRack →

MT32-Pi on my EuroRack MiniDexed PCB

This is great. I was asked by Michel (mragutlich) if I knew how to build MT32-Pi to configure it for my MiniDexed EuroRack PCB but I don't and there isn't a lot of information apparently on how to build it from source. So I offered my Rebuilding my Ability to Build MiniDexed post which talks about … Continue reading MT32-Pi on my EuroRack MiniDexed PCB →