On Monday 07 May 2007 11:24, Matt Ettus wrote: > Most of the daughterboards regulate the 6V down to 5V, so you really > need about 5.5 to 5.75 V to operate correctly.
Ah right, I didn't realise they powered off the "before" section of the regulator. Going straight to 3.3V would be suboptimal for noise anyway and probably not save you that much. > Matt > > Daniel O'Connor wrote: > > 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) > > http://au.farnell.com/jsp/Electrical/Power+Supplies+&+Converters/PO > >WERBOX/PBBA-1205F/displayProduct.jsp?sku=3821067 > > > > 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. > > > > > > > > ------------------------------------------------------------------- > >----- > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- 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 GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
pgp1GNXQNrxmO.pgp
Description: PGP signature
_______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
