[MinnowBoard] How to power with an ATX PSU and control it‏

[John 'Warthog9' Hawley]

On 03/16/2016 12:12 PM, Lee O'Nell wrote:
> I try to do myself an Hifi audio system, with kodi media player and with
> some recycled parts, like a little touch screen from an old photo frame,
> an laptop DVD drive and mini pcie WLAN card.
> I also have this Lure : http://wiki.minnowboard.org/Silverjaw_Lure for
> the WLAN card and a msata SSD.
> I also need to power an audio amplifier for speaker.
> lot of things to power and I hoped to do that with one power supply
> idealy an ATX PSU in order to control the start/shutdown of all.  I even
> have an old sfx PSU from a NAS

Ok, I've got *AN* idea, I make no claims to having tried it, that it's a
good idea, and I make no claims to it working.  The MAX / Turbot have a
fan header that is one when the power is on to the SoC.  You could use
that to drive a transistor that would open/close on the standby power /
on signal to the ATX power supply, and pull power from the rest of the
rest of the lines.  You would need to wire that up in parallel to
another button that would allow you to turn it on initially as well.
You'd also, likely, want some diodes in there to make sure you don't get
weird back feeding too.

It's an idea anyway.  Again, I'll reiterate I haven't tried this, I have
no idea if it would work fully (or what wouldn't work), and trying this
and frying your board wouldn't be covered by warranty

> I found some instructables examples but for arduino or Raspberry PI
> which can be powered itself by the 5V standby.

Raspberry Pi has a lower power need to run, so it can fit inside the 1A
that the 5V standby provides.  We need a bit more than that which is why
that wouldn't work exactly the same.

- John

> PS: how did you reply to a previous message, I'm not familiar with
> mailing list ..

Just hit 'reply' in your e-mail client.