MiniDexed EuroRack PCB Design

I've seen a number of EuroRack format MiniDexed versions now, from 3D printed panels and designs, right through to commercial modules. It's something I've been meaning to do for a while, so this is my first attempt at a take on a 8HP EuroRack format MiniDexed using a Raspberry Pi Zero 2 W. This is … Continue reading MiniDexed EuroRack PCB Design →

Waveshare Zero, Pimoroni Tiny, and Neopixels

I want to revisit my Forbidden Planet “Krell” Display looking at an alternative way to do the electronics. In particular, I'm looking at how I might embed a microcontroller in each display. This post is a short diversion into the world of some Waveshare "Zero" format devices and a bit of background on driving programmable … Continue reading Waveshare Zero, Pimoroni Tiny, and Neopixels →

Forbidden Planet “Krell” Display – MIDI CC Controller

This takes my Forbidden Planet “Krell” Display and adds some potentiometers to turn it into a MIDI CC message controller. Forbidden Planet “Krell” Display – MIDI CC Controller – Part 2 https://makertube.net/w/vz9RucdW1oi2XzAqPBa96g Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! If … Continue reading Forbidden Planet “Krell” Display – MIDI CC Controller →

ESP32C3 OLED Mini MIDI Montor

I've picked up a couple of really neat, small, ESP32C3 based boards with a built-in 0.42" OLED display and so whilst wondering what to do with them, I thought a small MIDI note monitor might be a bit of fun. https://makertube.net/w/3KWE9QUD2Qs9chcWwpX99R Warning! I strongly recommend using old or second hand equipment for your experiments. I … Continue reading ESP32C3 OLED Mini MIDI Montor →

Raspberry Pi 2,3,4 A+/B+ Synth Cases

As a prelude to building a case for some of my MiniDexed synth PCBs I was looking for a good starting point for a Raspberry Pi 3D printed case. I've found two, but neither was quite what I wanted, so I took inspiration from the two I found and created my own. This will go … Continue reading Raspberry Pi 2,3,4 A+/B+ Synth Cases →

EuroRack Test Power Supply PCB Design

I've a few EuroRack power supplies now, and most of them have a few things in common: Require an AC to AC "wall-wart" (typically 12VAC or above). Use diodes for half-wave rectifying and a large bank of capacitors for smoothing the resulting output. Use a 7912 and 7812 for -12V and +12V supply, and some … Continue reading EuroRack Test Power Supply PCB Design →

Forbidden Planet “Krell” Display – MIDI Notes – Part 2

As I mentioned in Forbidden Planet “Krell” Display – MIDI Notes I'm building a simple (in function, not in execution it would seem) MIDI note display out of my Forbidden Planet “Krell” Display. The first attempt showed there is potential, but I was rapidly reaching the limits of what an Arduino could do for me using … Continue reading Forbidden Planet “Krell” Display – MIDI Notes – Part 2 →

Forbidden Planet “Krell” Display – MIDI Notes

This is my first attempt at some kind of MIDI related visualisation for my Forbidden Planet “Krell” Display. I thought I'd start easy and simply map MIDI notes onto the segments and create a simple display. That turned out to be an awful lot more involved than I imagined... In fact, this is quite sub-optimal … Continue reading Forbidden Planet “Krell” Display – MIDI Notes →

Forbidden Planet “Krell” Display

If you're not familiar with The Forbidden Planet, then it is an iconic 1956 Sci-Fi movie with an absolutely ground-breaking soundtrack of "Electronic Tonalities" by Bebe and Louis Barron. In one scene, when the humans visit an alien (the "Krell") science lab there is a large set of display dials around the room that logarithmically … Continue reading Forbidden Planet “Krell” Display →

Multi-Mode MIDI Step Sequencer – CDR Format – Part 3

This post revisits the "CDR format" (CD Rack Format) panel version of my Multi-Mode MIDI Step Sequencer. Part 1 detailed the build and testing of the panel. Part 2 updated and enhanced the Multi-Mode MIDI Step Sequencer code to run on the panel. Part 3 (this post) details the design of a panel using a … Continue reading Multi-Mode MIDI Step Sequencer – CDR Format – Part 3 →