https://github.com/rcarmo/openscad-minidexed-rpi3a

A case for a MiniDexed synthesizer based on a Raspberry Pi 3A
https://github.com/rcarmo/openscad-minidexed-rpi3a

3a minidexed openscad raspberrypi

Last synced: 3 months ago
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A case for a MiniDexed synthesizer based on a Raspberry Pi 3A

• Host: GitHub
• URL: https://github.com/rcarmo/openscad-minidexed-rpi3a
• Owner: rcarmo
• License: mit
• Created: 2024-01-13T17:36:56.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-01-13T17:45:41.000Z (over 1 year ago)
• Last Synced: 2024-12-29T13:40:35.822Z (5 months ago)
• Topics: 3a, minidexed, openscad, raspberrypi
• Language: OpenSCAD
• Homepage:
• Size: 1.07 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# MiniDexed RPI 3A Case

![](images/top.png)

![](images/bottom.png)

This is a case for a [MiniDexed] synthesizer built with a Raspberry Pi 3A, a DAC and a custom board for a MIDI IN TRS jack (schematic included in the `kicad-mini-in` folder--I ended up just using a protoboard, so there's no real PCB data for that).

This repository includes the `STL` files for the case (top, bottom and knob), as well as the [OpenSCAD](https://openscad.org) files for the case and all boards (some of which I modified from some of the excellent libraries I keep tabs on [here](https://taoofmac.com/space/apps/openscad)).

There is also an (incomplete) slanted/oblique version of the case, which I may or may not finish.

## MIDI IN Schematic

This is a pretty simple schematic, and I ended up just using a protoboard for it. The TRS jack is a 2.5mm MIDI IN jack, and other than the [`H11L1M`](https://www.onsemi.com/products/interfaces/high-performance-optocouplers/high-speed-logic-gate-optocouplers/h11l1m) optocoupler, everything else is just a few resistors and capacitors:

![](images/schematic.png)

## Checklist

- [x] Check all screw hole sizes

- [x] Knob

- [x] Deeper top pattern (0.5mm)

- [x] LED hole

- [x] Wider SD card slot inset

- [x] MIDI TRS jack

## Printing Notes

![](images/box.jpg)

Printed in PLA, 0.2mm layer height, 3 perimeters, 3 top/bottom layers. I used Sunlu PLA+ for the bottom half of the case and Eryone Galaxy Black for the top and knob.

You may want to print the top half of the case with a plain face, but I went for a little more texture (which may or may not work well depending on PLA and lighting). I recommend printing the flat face down, and using mouse ear brims to keep it from warping (although the supports will help with that, too).

[MiniDexed]: https://github.com/probonopd/MiniDexed