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Green rectangular circuit board with gold GPIO header, two red RCA jacks, a black 3.5 mm jack, and a small IR receiver module

NuoTo

NuoTo X920 DAC+ HAT Expansion Board barebone mini PC

SKU CH-CPE5-NJC2A

Adds 24-bit 192 kHz audio with 112 dB SNR and hardware volume control to Raspberry Pi 3, 2B, B+, Zero W and A+ via HAT

  • CPU TypeOther
  • High-fidelity 24-bit/192kHz playback via PCM5122 DAC
  • 112 dB SNR and -93 dB THD for transparent sound
  • Hardware volume control with LP5907 ultra-low-noise regulator
  • RCA and 3.5 mm outputs plus built-in IR receiver
  • HAT-compliant, powered by Raspberry Pi with GPIO access

Audio expansion for Raspberry Pi

The NuoTo X920 DAC+ HAT adds high-resolution analogue output to Raspberry Pi 3 Model B, 2B and B+ boards. It mounts directly on the 40-pin header and draws power from the host, so no separate supply is needed. The board targets hobbyists and media-centre builders who want better sound than the Pi’s own PWM output.

Upgrade from on-board audio

The on-board 3.5 mm jack on a Raspberry Pi is limited to 11-bit PWM quality. This HAT replaces it with a TI PCM5122 DAC delivering 24-bit 192 kHz playback, 112 dB SNR and –93 dB THD. The jump is worth it when you stream lossless files or run a dedicated player such as Volumio, Moode or RuneAudio and need transparent conversion.

Integration and I/O

The board exposes RCA and 3.5 mm phone-jack outputs at 2.0 V RMS line level. An on-board Vishay TSOP34838 IR receiver on GPIO 17 allows remote control. GPIO pins 18, 19 and 21 carry the I2S data stream, while the remaining header stays accessible for other HATs or sensors. Hardware volume control and a TI LP5907 ultralow-noise regulator keep the analogue section clean.

Highlights

  • High-fidelity 24-bit/192kHz playback via PCM5122 DAC
  • 112 dB SNR and -93 dB THD for transparent sound
  • Hardware volume control with LP5907 ultra-low-noise regulator
  • RCA and 3.5 mm outputs plus built-in IR receiver
  • HAT-compliant, powered by Raspberry Pi with GPIO access

Specifications

CPU TypeOther

Questions about this item

Which GPIO pins does the X920 DAC+ HAT use for I2S audio input?

The board receives I2S data on GPIO21, bit clock on GPIO18 and left-right clock on GPIO19, with a ground reference.

What software step is often missed when enabling the board on a Raspberry Pi?

You must add the correct device-tree overlay for the PCM5122 DAC in config.txt before the IR receiver on GPIO17 and hardware volume control will function.

Which on-board component will need attention if the IR remote stops responding?

The built-in Vishay TSOP34838 receiver on GPIO17 is the only IR sensor; if it fails the board loses remote-control capability.

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