[How to do instruction] Raspberry Pi power Supply

[rongon]

Any idea how much maximum peak current an Allo Boss DAC draws? I see discussion about the current needed by the pi (4A or more, I guess) but not about the DAC. If it uses less than 1A max, how about an LT1115 based supply using a 6.3VAC 2A transformer to make about 8VDC raw supply, then regulate that down to 5V? 3V dropped by the regulator delivering 1A current means 3W heat dissipated, so a reasonably heatsink should work well enough.