Sunday, May 31, 2009

Arduino Controller & DAC



The DAC is a kit from TwistedPear Audio, based on the WM8741.
2-wire I2C connection (plus GND)




Inside the OPUS DAC: Leftmost is the toroid transformer inside a tin can. Middle is a dual DC power supply, rightmost are 3 boards stacked: top is the SPDIF receiver, middle is the asynchronous re-sampler and re-clocker board and bottom is the DAC board based on the Wolfson 8741.



Detail of the 2-wire I2C connection to the DAC board.



Detailed connection diagram


Arduino I2C connections are analog pin 4 and 5

1 comment:

  1. Hi,

    Very nice post, I'm in the process of building a similar project but with some added complexity and...

    ...I'm having problems with the Detailed connection diagram you show in this post. I have a dual-mono configuration and I'm using also 2-wire I2C with Arduino Uno R3.
    How can I contact you about this project? I have a diagram of my dual-mono with upsampler I want to send you so you can input some suggestions. My email is producao.1979gmail.com.

    P.S: I also did some modifications to the code you provide. It would be wonderful if someone could help me review it.

    Thank you very much in advance...

    All the best

    ReplyDelete