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Re: [Discuss-gnuradio] Mobile Power Supply for USRP

From: Daniel O'Connor
Subject: Re: [Discuss-gnuradio] Mobile Power Supply for USRP
Date: Mon, 7 May 2007 10:09:53 +0930
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On Monday 07 May 2007 00:29, Eric A. Cottrell wrote:
> Is there a off-the-shelf product to power the USRP from 13.8 volts? 
> My understanding is the USRP needs a couple of amperes at 6 volts. 
> The best I saw was 1 Ampere maximum output.

I think you could use DC-DC converter that outputs 5V.

The dropout on the regulator used is 1.5V, and 3.3 + 1.5 = 4.8V. Not a 
lot of headroom but it should work OK.. Right? :)

You could test it using your PC power supply before spending money too.

Farnell sell DC/DC converters that will do the job but they are not 
cheap (>AU$100) 

They also sell DC/DC converters that will go down to 3.3V but then you 
would need to remove the existing regulator and it would almost 
certainly be much noisier without the linear regulator in there.

Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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