DIY SDVX Controller

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Hello! This is a DIY controller project for Sound Voltex and similar rhythm games. It's built using an STM32 microcontroller (Black Pill), with custom firmware, a custom PCB, and a 3D-printed enclosure.

Project Features

• Microcontroller STM32F401 (on a Black Pill v3.0 board).
• Buttons 7 main (BT-A, B, C, D, START) + 2 FX buttons (FX-L, FX-R) on CherryMX switches (e.g., Outemu Red).
• Rotary encoders 2 x LPD3806 (VOL-L, VOL-R).
• Addressable RGB lighting on WS2812B LEDs (optional, strip connected to PB0).
• Interface USB HID (the controller is recognized as a standard game device).
• Fully 3D-printed enclosure.
• PCB ideal for single-layer home etching, no need to order a board.

Demonstration

Hardware

All hardware-related files are located in the hardware/ folder.

PCB

The PCB project was designed in EasyEDA. Source files, Gerber files for ordering, and the BOM are located in hardware/pcb/.

Schematic	Board Layout

PCB Assembly Photos:

PCB Front	PCB Back

Enclosure

3D models for the enclosure and its components were designed in KOMPAS-3D. Source CAD files, exported STEP files, and STL files for printing are located in hardware/enclosure/ and hardware/stl_for_printing/.

3D models of the components used (BlackPill, encoders, switches) are in hardware/enclosure/component_models_3d/.

Assembly Process (Photos)

Connecting encoders to the front panel	LED strip installation

BlackPill Modification:

Optionally, a small hardware modification can be made to the BlackPill by adding a 150nF ceramic capacitor (as shown in the illustration). This allows entering DFU mode by holding the START button for 10 seconds.

Software (Firmware)

The firmware for the STM32 microcontroller was developed using STM32CubeIDE. The source code is located in the firmware/ folder.

Key firmware functions:

• Polling buttons and encoders states.
• Controlling RGB lighting, including visual effects.
• Transmitting data to the PC via USB HID protocol.

Assembly and Setup

[A DETAILED ASSEMBLY GUIDE, COMPONENT LIST, FIRMWARE FLASHING INSTRUCTIONS, AND SETUP DETAILS WILL BE HERE]

General steps:

1. Print the enclosure parts using the STL files from the hardware/stl_for_printing/ folder.
2. Manufacture the PCB: Either order it using the Gerber files from hardware/pcb/gerbers/ or etch it yourself using the project files from hardware/pcb/easyeda_project/.
3. Assemble the PCB, solder buttons, encoders, LED strips.
4. Assemble the enclosure.
5. Flash the microcontroller - compile the project from firmware/ (or use a pre-compiled binary from the releases) and flash the Black Pill (e.g., via DFU mode or using an ST-Link).
6. You're awesome!

More detailed instructions for assembly and setup will be added to the docs/ folder later (sometime).

License

This project is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).