<p dir="ltr">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?</p>
<p dir="ltr">Thanks!</p>
<div class="gmail_quote">On Dec 5, 2014 8:29 PM, "Bob" <<a href="mailto:Bob@fot.com.au">Bob@fot.com.au</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All<br>
When using a 7805 Regulator male sure you putĀ low ESR capacitors (10microfarad) right on the input and output terminals to ensure it doesn't oscillate<br>
<br>
Bob<br>
<br>
<br>
<br>
On 6 December 2014 10:12:45 "Mark Herson, N2MH" <<a href="mailto:n2mh@n2mh.net" target="_blank">n2mh@n2mh.net</a>> wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I'm running a pair of BBB's each from its own 7805 voltage regulator with<br>
no problems. One BBB is an Element14 card (which is the Chinese version,<br>
problably what comes from MicroCenter) and the other is the USA version<br>
from Beaglebone.org. No startup problems have been noted at all.<br>
<br>
Of course, when using a 7805 voltage regulator, one must use a good<br>
heatsink. I measured the current draw at 350 mA or so. With an 8 volt<br>
voltage drop, that comes out to about 2.5 to 3 watts that the voltage<br>
regulator must dissapate. This requires a pretty good heatsink.<br>
<br>
73, Mark, N2MH<br>
<br>
> To: <a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
> From: <a href="mailto:ke2n@cs.com" target="_blank">ke2n@cs.com</a><br>
> Date: Thu, 4 Dec 2014 06:57:55 -0500<br>
> Subject: [arm-allstar] power up<br>
><br>
><br>
> Any one else have a BBB Rev C power up problem?<br>
><br>
><br>
><br>
><br>
> <a href="http://elinux.org/Beagleboard:BeagleBoneBlack#Improper_Power_Down....All_" target="_blank">http://elinux.org/Beagleboard:<u></u>BeagleBoneBlack#Improper_<u></u>Power_Down....All_</a><br>
> Rev<br>
> isions<br>
><br>
><br>
><br>
> I got two units from Micro Center and they both have a really hard time<br>
> getting started.<br>
><br>
> One unit I got from Spark Fun works fine every time.<br>
><br>
><br>
><br>
><br>
> Ken<br>
<br>
<br>
______________________________<u></u>_________________<br>
<br>
arm-allstar mailing list<br>
<a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
<a href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar" target="_blank">http://lists.hamvoip.org/cgi-<u></u>bin/mailman/listinfo/arm-<u></u>allstar</a><br>
<br>
Visit the BBB web page - <a href="http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/" target="_blank">http://www.crompton.com/<u></u>hamradio/<u></u>BeagleBoneBlackAllstar/</a><br>
</blockquote>
<br>
<br>
<br>
______________________________<u></u>_________________<br>
<br>
arm-allstar mailing list<br>
<a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
<a href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar" target="_blank">http://lists.hamvoip.org/cgi-<u></u>bin/mailman/listinfo/arm-<u></u>allstar</a><br>
<br>
Visit the BBB web page - <a href="http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/" target="_blank">http://www.crompton.com/<u></u>hamradio/<u></u>BeagleBoneBlackAllstar/</a><br>
</blockquote></div>