PCB: Power supply

[softerhardware]

The current regulators burn 1.5W, too much for portable operation. I want 3.3, 5 and 12V for daughter board features like power amps, etc. I want direct 3.3 input for battery operation. In the spirit of using inexpensive off the shelf components, I've started using a computer power supply for the Hermes Lite. The Antec VP-450 does not show signs of noise and sells for $37 at NewEgg or Amazon. So, rev 1.1 will have the following changes:

• Drop 3.3V regulators and power from external power supply. I've tested this with the Antec VP-450 and my current prototype and it works fine.
• Include SATA connector on SDR board.
• Include through hole for those wishing to wire their own power supplies in.
• Include power source/feed through PCIe connector.
• Use freed space for a bit beefier filtering, ferrite bead.
• For power to BeMicro, replace P8 with a jumper to 5V.
• Connect any power plane left unconnected in the prototype for experimental reasons.

[softerhardware]

• Proper use of PWREN# so that SDR board can power BeMicro.

[softerhardware]

Done.