[Voyage-linux] Any Hardware Voltage Monitoring/Usage Sensors Available for ALIX boards?

[Nick L.]

2012/1/22 Jeff Mai <jmai at iinet.net.au>:
> The Alix 2d2 schematic shows a 5V linear regulator directly after the DC
> input jack.  If you feed the Alix with a 15V external supply, this regulator
> probably dissipates as much as 2-3 Watts as heat
>
> There is a separate supply for the USB power that looks like a DC - DC
> converter.  It will be more efficient, but noisier.
>
> I found I could run my board with as little as 9V input, but it depended on
> the USB equipment attached.  My HagUSB converter worked fine, but the
> Audiophilleo 1 did not.
>
> Your Ayre DAC is certainly not going to use USB power from the Alix.  I
> think you could get away with 9V - maybe less.

The Ayre QB-9 does require USB power. I believe it powers the Asynch
USB input board. The rest of the DAC is opto-isolated from this board
and has a dedicated supply.