[arm-allstar] power up

[Andrew Sylthe]

I typically use a 22 picofarad on the input, and a 10 microfarad on the
output of the 7805. Is that not the correct way to do things?

Thanks!
On Dec 5, 2014 8:29 PM, "Bob" <Bob at fot.com.au> wrote:

> 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
>>
>>
>> _______________________________________________
>>
>> arm-allstar mailing list
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>>
>> Visit the BBB web page - http://www.crompton.com/hamradio/
>> BeagleBoneBlackAllstar/
>>
>
>
>
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>
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>
> Visit the BBB web page - http://www.crompton.com/hamradio/
> BeagleBoneBlackAllstar/
>
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