This product is no longer available
We no longer stock JustBoom Digi HAT, but here are current alternatives in Books & Reading.
JustBoom Digi HAT
Discontinued
The JustBoom Digi HAT is a high-resolution digital audio output board for the Raspberry Pi. It delivers an unmodified, bit-perfect digital audio stream via optical (TOSLINK) or coaxial (RCA) S/PDIF outputs, making it ideal for connecting your Pi to an external DAC, amplifier, or hi-fi system.
The board uses the I²S interface for audio input, reducing CPU load compared to USB audio solutions. It draws power directly from the GPIO header — no extra cables or power supplies needed. All GPIO pins remain accessible via an unpopulated 40-pin extension header for additional project customisation.
Key Features
- S/PDIF Output – Optical (TOSLINK) and coaxial (RCA) digital audio outputs
- Up to 192 kHz / 24-bit – High-resolution, low-jitter bit-perfect output
- Galvanic Isolation – Output transformer for electrical isolation from your hi-fi
- I²S Audio Input – Low CPU overhead compared to USB audio
- Plug and Play – No soldering required, mounting hardware included
- GPIO Passthrough – All 40 pins accessible via extension header
- IR Receiver Included – Optional infrared receiver in the package
- Software Volume Control – Adjustable from the Raspberry Pi
Specifications
- Audio Resolution – Up to 192 kHz / 24-bit
- Digital Outputs – Optical (TOSLINK) + Coaxial (RCA)
- Audio Interface – I²S via GPIO header
- Power – Supplied via Raspberry Pi GPIO header
- Compatibility – Raspberry Pi A+, B+, 2B, 3B
Software Compatibility
- Raspberry Pi OS, OSMC, Volumio, Moode, RuneAudio, Max2Play, PiCorePlayer, PiMusicBox, LibreELEC, and more
Ideal For
- Hi-fi audio streaming from a Raspberry Pi
- Digital audio output to external DACs and amplifiers
- Multi-room audio systems
- Media centre builds
