Home > General > Arduino Controller (High Res)

Arduino Controller (High Res)


  • Reliable sources indicate that the 5v to 3.3v conversion is not necessary as the input of the Sabre32 chip is 5v tolerant. Since I already built it for the Wolfson WM8741 DAC (which is not 5v tolerant), there was no harm using it. You can omit it, build your own, buy a converter or even use an isolator
  • The red PCB I purchased from NKC. I already used it in my previous project and reused it here as a bread board. You can use any other method for the connections, but it makes it easier to add components. If you wish to use a PCB, I would recommend this one for $4
  • Eventually, I’ll move the controller to a nicer box
  • I adjust the brightness of the LCD by controlling the current delivered to the LCD’s backlight. I connect the GND line of the LCD’s backlight to a transistor (I am using a jfet, since I’ve got a ton of it). The current through the jfet is controlled by the voltage applied to the gate of the jfet. I vary the voltage with an analog pin in the Arduino
  1. January 22, 2011 at 13:53

    Where’d you get that knob? Does it have a marker? It’s really hard to find nice knobs that don’t have markers for use with encoders!

  2. BlogGeanDo
    January 22, 2011 at 16:11

    I got it on eBay. I has a tiny marker that is invisible unless you get close and looking for it

  3. Branko
    January 28, 2011 at 20:28

    from where do you take the 5V DC with a buffalo dac. do you use the dacs powersupply or a seperate supply for the arduino and the display? Thx

  4. BlogGeanDo
    January 28, 2011 at 22:55

    Hi Branko, I use a separate supply for Arduino and display. See here: https://hifiduino.wordpress.com/2010/04/24/ultimate-placid/ I am using the “auxiliary power supply”…

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