Proffieboard V3.9 Open Source Lightsaber Sound Board - Powerful

Our review of the Proffieboard V3.9 finds it aimed squarely at builders and hobbyists who want the most capable open source lightsaber sound board available without fuss. The single biggest reason to buy is its upgraded STM32 processor and expanded memory that unlock more presets, smoother swing sensing and advanced audio effects; this makes it a clear step up for anyone building a custom saber or upgrading an older board. The board ships assembled and tested and includes a 16GB Micro SD so users can start loading sounds and experimenting immediately.

Key Features

• 80MHz ARM processor: delivers responsive sensing and fast audio processing so motion effects and triggers feel immediate and accurate.
• 3W mono amplifier: provides enough volume to drive a single speaker for clear, full-range blade sound without needing an external amp.
• Improved memory and RAM: 512kB flash and 160kB RAM mean more presets, mp3 and echo effect support, and room for future expansions.
• Motion coprocessor IMU: enables smooth swing detection for realistic sound timing and blade motion effects.
• Six MOSFET outputs: allow reliable control of external LEDs and effects while the board handles all other electronics except the LEDs.
• USB charging and deep sleep: built-in 450mA USB charging and deep sleep support simplifies power management and battery longevity.

Who It's For

The Proffieboard V3.9 is best for intermediate to advanced lightsaber builders, prop makers and tinkerers who value open source flexibility and want modern motion sensing plus expanded audio capabilities. It is ideal when you plan to run custom soundfonts, mp3s, or advanced swing effects that need the extra flash and RAM.

Less technical buyers who want a plug-and-play, turn-key saber kit with minimal configuration might prefer a simpler preconfigured board; likewise, those needing stereo audio or multi-watt amplification for external PA use should look at alternative audio solutions. This board focuses on onboard, single-channel audio and control versatility.

Pros & Cons

Pros

• Open source firmware and robust processor give great customization and future-proofing.
• More flash and RAM enable more presets and advanced effects like mp3 playback and echo.
• Onboard 3W amplifier and IMU provide strong, compact audio and realistic motion sensing.
• Assembled and tested unit with included 16GB card gets users started quickly.

Cons

• Mono 3W amplifier limits loudness and stereo capability compared with larger audio setups.
• 5V output is only active when sound plays, which can complicate some lighting designs that expect continuous power.

Specifications

Processor	80MHz STM32 ARM (upgraded BGA CPU)
Flash memory	512kB
RAM	160kB
Audio amplifier	3W mono
Power / charging	450mA USB charging, BATT+ input 2.6 to 5V
Outputs	6 MOSFETs for external LEDs
Included storage	16GB Micro SD

Our Verdict

The Proffieboard V3.9 is a worthwhile upgrade for builders who want a modern, open source sound board with stronger processing, more memory and advanced swing sensing. It balances compact onboard audio with flexible control outputs and bundled storage, making it good value for hobbyists who will use customization and advanced effects rather than buyers who need simple, always-on LED power or stereo sound.

Frequently Asked Questions

Does the board come ready to use out of the box?
The unit ships assembled and tested and includes a 16GB Micro SD so users can load sound packs and begin testing right away.

What power range does the board accept?
It accepts BATT+ input from approximately 2.6 to 5V and provides USB charging at 450mA for the battery.

Will it drive my LEDs continuously?
The board generates 5V which is normally on only when sound plays, so continuous LED power may require an alternate supply or wiring approach.