[arm-allstar] power up

[Bob]

Hi All
When using a 7805 Regulator male sure you put  low ESR capacitors 
(10microfarad) right on the input and output terminals to ensure it doesn't 
oscillate

Bob



On 6 December 2014 10:12:45 "Mark Herson, N2MH" <n2mh at n2mh.net> wrote:

> I'm running a pair of BBB's each from its own 7805 voltage regulator with
> no problems. One BBB is an Element14 card (which is the Chinese version,
> problably what comes from MicroCenter) and the other is the USA version
> from Beaglebone.org. No startup problems have been noted at all.
>
> Of course, when using a 7805 voltage regulator, one must use a good
> heatsink. I measured the current draw at 350 mA or so. With an 8 volt
> voltage drop, that comes out to about 2.5 to 3 watts that the voltage
> regulator must dissapate. This requires a pretty good heatsink.
>
> 73, Mark, N2MH
>
> > To: arm-allstar at hamvoip.org
> > From: ke2n at cs.com
> > Date: Thu, 4 Dec 2014 06:57:55 -0500
> > Subject: [arm-allstar] power up
> >
> >
> > Any one else have a BBB Rev C power up problem?
> >
> >
> >
> >
> > http://elinux.org/Beagleboard:BeagleBoneBlack#Improper_Power_Down....All_
> > Rev
> > isions
> >
> >
> >
> > I got two units from Micro Center and they both have a really hard time
> > getting started.
> >
> > One unit I got from Spark Fun works fine every time.
> >
> >
> >
> >
> > Ken
>
>
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