https://github.com/fortinsylvain/halloweenizer

RaspberryPi Pico Midi and DMX512 controller
https://github.com/fortinsylvain/halloweenizer

cinematic-effects dmx512 halloween midi midi-controller raspberry-pi-pico raspberry-pi-pico-2 roland-s330 rp2040 sampler sound-effects synthesizer visual-effects

Last synced: 10 months ago
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RaspberryPi Pico Midi and DMX512 controller

• Host: GitHub
• URL: https://github.com/fortinsylvain/halloweenizer
• Owner: fortinsylvain
• Created: 2025-03-25T23:04:08.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-03-27T18:52:35.000Z (about 1 year ago)
• Last Synced: 2025-04-08T12:49:26.694Z (about 1 year ago)
• Topics: cinematic-effects, dmx512, halloween, midi, midi-controller, raspberry-pi-pico, raspberry-pi-pico-2, roland-s330, rp2040, sampler, sound-effects, synthesizer, visual-effects
• Language: C
• Homepage:
• Size: 1.6 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Halloweenizer

## RaspberryPi Pico MIDI and DMX512 Controller

This project uses a Raspberry Pi Pico to control both MIDI and DMX512, creating a synchronized audiovisual experience for Halloween.

## 🎵 MIDI Integration  

The Pico sends MIDI output to a Roland S-330 digital sampler, which plays eerie sounds, special effects, and haunting organ chords. These sounds, amplified through speakers, set the perfect spooky atmosphere.

![](Roland_S-330.jpg)

## 💡 DMX512 Lighting Control 

The DMX512 output drives two RGB projectors, programmed to create dramatic lighting effects, including simulated thunderstorms and eerie color shifts to enhance the ambiance.

![](projector_DMX512_front.jpg)

![](projector_DMX512_back.jpg)

## 🛠️ Build & Implementation 

### Schematic (Hand-drawn draft)

A wall-mounted 5 V power supply provides power to the VSYS input of the Raspberry Pi pico and the other components. A MC3487 Quadruple Differential Line Driver chip converts the 3.3V GPIO output into a differential pair, which is then connected to a female XLR connector. Another GPIO pin controls two 2N2222 NPN transistors connected in cascade to drive the MIDI connector.

![](schematic.jpg)

The project is currently assembled on a breadboard:

![](BreadBoard.jpg)

A permanent build is not planned at the moment, but the setup works well for its purpose.

## 🎃 Spooky Fun

This project was a blast to build, generating both frighteningly fun effects for kids and a satisfying challenge for the programmer!

## ⚠️ Warning

This project significantly boosts visibility, so be prepared to hand out plenty of candy to visitors!