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Raspberry Pi Compute Module 3 carrier board for Audiophile application.
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RAL-KCM3MB1
  • Use Raspberry Pi CM3/M3+ and make Audiophile grade Network Player.
  • Low noise and low EMI 3.3V/1.8V onboard regulators bring high-fidirity sound.
  • Onboard LAN9514 and 40P GPIO pin hesader bring full compatibility with Raspberry Pi 3B/3B+.
  • Independent I2S, I2C, SPI connectors for DAC,SRC and Audio interface.
  • Three status LED(Power, Acess, Shutdown) and POWER-ON/SHUTDOWN push button sw.
  • The Audiophile grade aluminum enclosure kit is available.
  • MSRP US$223.0(not include CM3,microSD,shipping fee and tax)


Product Features

Ready for Raspberry Pi Compute Module 3/3+.
Supports both Lite and eMMC model.

RAL-KCM3MB1 has standard DDR2 SODIMM socket. Just set CM3/3+ into the socket firmly and get I2S,I2C,SPI,GPIO sinals through onboard connectors and GPIO 40P header.

microSD card slot for CM3/3+ Lite.

The microSD card slot at board edge is avilable for CM3/3+ Lite to load an OS image same as Raspberry Pi 3B/3B+. Set microSD card written an OS image befor boot. This slot is effective for Lite only.

microUSB connector for CM3/3+ onboard eMMC.

The microUSB connector at board edge is available to write an OS image to the onborad eMMC Flash.

Fully compatible LAN port and four USB-A port with Raspberry Pi 3B/B+

Onboard LAN9514 chip provides full compatibility with Raspberry Pi 3B/3B+. Don't need additional device driver and configuration and setup process.

LAN port Network Access LED ON-OFF setteing is available. Four USB-A ports are fully compliant to USB guide line and have indipendent Bus_Power protector,EMI filiter and serge protector.

HDMI® port.
Add local HDMI® display.

RAL-KCM3MB1 has HDMI® port which support full-HD resolution. It's very usefull for stand alone Networ Player to display playlistand album-art.

I2S,I2C and SPI port for Audiofile grade application.

DAC or SRC audio interface I2S port and control interface I2C,SPI port are available on the board. These ports are suitable to make Audiophile grade Network Player. The I2S port provides low noise PCM signal and it provides high-fedirity sound.

Fully comaptible 40P Header

RAL-KCM3MB1 has 40P GPIO Hearder which is fully compatible with Raspberry Pi 3B/3B+ except DC+5V input(The 40 header onboard DC+5V pin is assinged as OUTPUT only). It accept HAT board and provide DC+5V power to it.

I2S,I2C and SPI connector for Audiofile grade DAC,SRC.

The I2S connector provide the interface with Audio DAC,SRC or other Audio Processor. I2C and SPI connector provide register setting and control function for DAC.

Connectors Layout.

RAL-KCM3MB1 has usefull IO connectors at both edge and headers for mode setting.

The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI Trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.


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