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<body class='hmmessage'><div dir='ltr'><font style="" color="#000000" face="Tahoma,sans-serif">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.<br id="FontBreak"></font><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr id="stopSpelling">To: arm-allstar@hamvoip.org<br>From: ke2n@cs.com<br>Date: Fri, 5 Dec 2014 06:27:21 -0500<br>Subject: [arm-allstar] power up<br><br><font color="black" face="arial" size="2">
<div>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.</div>
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<div>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.</div>
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<div>But sometimes it just works.</div>
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<div>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.</div>
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<div>I have ordered a couple of the Adafruit 4 ampere supplies and will report back in about a week..</div>
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<div>73</div>
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<div>Ken</div>
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