[hpsdr] power supply for hpsdr

[n3evl]

I also am using a standard PC supply - even using the PC case it came in.

I did not have any problems with Atlas not providing enough load - all LEDs 
came on when the supply was connected to Atlas without any other boards 
installed.  Definitely best to test it this way!

I did wire up a small toggle switch to the Atlas board to turn power on/off. 
I believe this serves the same function as similar connections on PC 
motherboards that, when on, connects the two pins of the power supply that 
turn it on - I think it's pin 14 (green) on the ATX connector to ground.

Have not noticed any issues with using this type of supply.  I did compare 
against a linear supply (Elenco XP-720 Bench supply that has the necessary 
voltages) but did not notice any difference when compared to the PC 
switching supply.  A/J/O/P continue to play nicely and are looking forward 
to meeting Mercury.

Pete, N3EVL


----- Original Message ----- 
From: "Joe Martin K5SO" <k5so at valornet.com>
To: <hpsdr at lists.hpsdr.org>
Sent: Friday, June 27, 2008 10:27 PM
Subject: Re: [hpsdr] power supply for hpsdr


> ***** High Performance Software Defined Radio Discussion List *****
>
> Oh, by the way, Dominic, if you decide to use an ATX power supply, I 
> noticed that the Atlas board alone (no boards plugged in) does not 
> provide enough of a load (LEDs only) for my ATX supply to come on and 
> operate normally; it needs more of a load than the few LEDs provide  that 
> are present on Atlas.  I found that I needed to have the one or  more of 
> the O/J/P boards inserted into Atlas before the ATX supply  would come up 
> properly.
>
> 73,  Joe K5SO
>
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