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Green PCB with gold curved traces, RCA and optical ports, 40-pin header

NuoTo

NuoTo SC07 Raspberry Pi HiFi DiGi+ expansion board

SKU CH-052Q-2GFZ0

Expansion board adds I²S, S/PDIF optical and RCA coaxial outputs to Raspberry Pi 2 and 3 models, supports 16 to 24-bit audio with 50 ps jitter control and hardware volume adjustment

  • CPU TypeOther
  • Expansion board adds digital audio output for Raspberry Pi 2 and 3 models
  • I2S interface handles 16 to 24-bit audio with 50 ps RMS jitter control
  • Hardware volume control via I2C lets you adjust levels without software latency
  • Optical S/PDIF and coaxial RCA outputs connect directly to external DACs or amplifiers
  • Gold-plated curved PCB traces maintain signal integrity and reduce reflections

HIFI DiGi+ Expansion Board

The NuoTo SC07 is a digital sound card expansion board built for Raspberry Pi 2 Model B, B+ and Raspberry Pi 3 boards. It adds high-quality audio output to single-board computers used as network music players or media centres.

Simple GPIO Installation

The board mounts directly onto the Raspberry Pi GPIO header and draws power from the Pi itself, so no external supply is needed. An on-board indicator light confirms power status, and the design avoids using additional GPIO pins, leaving them free for other peripherals.

I2S Digital Output

The board uses the Pi I2S interface to deliver direct digital audio to external DACs or amplifiers via S/PDIF optical and coaxial RCA connectors. This bypasses USB audio paths and supports 16 to 24 bit audio formats with jitter controlled to 50ps RMS.

Highlights

  • Expansion board adds digital audio output for Raspberry Pi 2 and 3 models
  • I2S interface handles 16 to 24-bit audio with 50 ps RMS jitter control
  • Hardware volume control via I2C lets you adjust levels without software latency
  • Optical S/PDIF and coaxial RCA outputs connect directly to external DACs or amplifiers
  • Gold-plated curved PCB traces maintain signal integrity and reduce reflections

Specifications

CPU TypeOther

Questions about this item

How can I verify the SC07 board is working after connecting it to my Raspberry Pi 3 Model B?

The power indicator light on the board shows the expansion board status, and you can test audio output through the S/PDIF optical or coaxial RCA interfaces using a compatible player system like RuneAudio or OSMC.

What comes with the NuoTo SC07 HiFi DiGi+ expansion board and what must I provide separately?

The board itself is supplied; you must provide a Raspberry Pi 2 Model B, B+, or 3 board and a power supply for the Pi, as the expansion board draws power from the Pi without needing an external supply.

Which Raspberry Pi models are compatible with this SC07 expansion board?

The board is designed for Raspberry Pi 2 Model B, 2 Model B+, and 3 boards; note that on the Pi 3 it supports RuneAudio and OSMC but not Volumio.

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