Looking at power supply designs, based upon the requirements of the various boards. The DAC board needs various voltage levels, and an inverted polarity for some parts. The main board is a little more simple in it's needs, plus no need for extremely accurate reference voltages as are required when entering the analog world.
I think I can get everything done with a single transformer with an output somewhere between 7 to 9 volts. I'm used to the requirements of power amplifiers, looking at logic level electronics everything is to a much smaller scale. That makes things both easier and harder.
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