[arm-allstar] power up

[Doug Crompton]

A good digital meter and/or a scope would certainly tell you if you had power supply problems. Measure the voltage at the BBB power plug. We had one guy who had a bad Adafruit supply. If you are just using one supply in these tests I would suspect it to be the cause. If you tried several then I would think not. A 1A supply will run the BBB and URI fine. There is certainly no need for more than 2A. Also check the AC ripple.
73 Doug
WA3DSP
http://www.crompton.com/hamradio


To: arm-allstar at hamvoip.org
From: ke2n at cs.com
Date: Fri, 5 Dec 2014 06:27:21 -0500
Subject: [arm-allstar] power up


The suggestions made to my last posting were all covered in the link that I had included and I have tried them to no avail.

 

Last night the unit from SparkFun did the same thing.  On power up the P/S LED just blinks at about 2/second and it will eventually come up at some point, unpredictably.   Last night I just left it blinking overnight and, when I got up this morning, it was in run.  This happens with the asterisk SD image and straight out of the box with only the eMMC.

 

But sometimes it just works.

 

I saw the suggestion about the power supply and I suspect that may be the problem.  Perhaps the current surge when the onboard regulator kicks in may be causing my wall wart to go into current limit.

 

I have ordered a couple of the Adafruit 4 ampere supplies and will report back in about a week..

 

73

 

Ken

 

 

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