Thanks for noticing my post. I wasn't suggesting that the BeagleBone design needs to be changed. I shared my experience to show that the Beaglebone design allows for a semi-competent hardware hacker to make nuance changes to solve a particular problem if one is willing to risk a modest investment. Isn't solving problems part of the fun?
I have experienced no problems since I changed *the **polymeric positive temperature coefficient** device (PPTC, commonly known as a resettable fuse).* It doesn't look kluged or hacked. All internally measured voltages and temperatures remain nominal. My old VGA monitor has a new purpose On Tue, Mar 11, 2014 at 12:09 PM, Gerald Coley <ger...@beagleboard.org>wrote: > It is not a fuse. It is a PTC. That is why on the Wiki we recommend an > externally powered converter. The 5V comes from the power supply in the > wall, so there is no regulator on the board to overload. > > We decided to meet the HDMI specification, so that is the reason for the > current limit. > > > Gerald > > > > On Tue, Mar 11, 2014 at 11:04 AM, vermonttaxpa...@gmail.com < > fridayfoodaff...@gmail.com> wrote: > >> My hopes of using a cheap vga monitor drifted away when my HDMI to VGA >> converter shut down within a few seconds. A peek at the BeagleBoneBlack >> schematic shows a 100 ma resettable fuse guarding the mini hdmi power pin. >> It's the yellow thing that looks like a ceramic capacitor. Luckily it's >> not surface mounted, so is relatively easy to replace with a 200 ma fuse -- >> digikey#RXEF020-ND. Now 35 cents and ten minutes work later, all is well. >> I do use a powered USB hub so as not to overload the BB power regulator -- >> the reason, is suppose, why the designers used the fuse. >> >> On Friday, June 14, 2013 1:52:12 PM UTC-4, lee jones wrote: >>> >>> Hello all :) (newbie alert btw!) >>> >>> I've just recently (only in the last few days) bought a beaglebone black >>> and also a mini hdmi to normal sized hdmi cable to go with it. Unfortunatly >>> I'm not managing to get any display with an HDMI to VGA converter however. >>> >>> I can confirm the beaglebone is doing something as I was able to connect >>> it to a TV with HDMI input, and it displayed a picture ok. >>> >>> After looking into all of this I noticed this page regarding HDMI to VGA >>> converters - http://circuitco.com/support/index.php?title=BeagleBone_ >>> Black_Accessories#HDMI-VGA_Adapters . My HDMI to VGA looks very similar >>> but not quite the same to that converter, in fact it looks rather like this >>> - http://www.amazon.co.uk/Adapter-Laptop-Power-Free- >>> Raspberry-support/dp/B0088K7QUQ/ref=sr_1_2?ie=UTF8& >>> qid=1371231750&sr=8-2&keywords=HDMI+to+vga >>> >>> One difference I noticed is that the one linked to in the circuitco >>> webpage appears to be powered (presumably by the micro usb port on the >>> converter?). Mine dosen't have that at all; btw originally my converter was >>> bought to be used with the rasberry pi. Since one converter is powered and >>> the other isn't am I right in assuming that the beaglebone dosen't supply >>> the neccecary +5V to power a device connected to the HDMI port at all, >>> hence the failure? >>> >>> This is only speculation but prehaps most of the HDMI to VGA converters >>> originally bought for rasberry pi's and then subsequently used to try to >>> work on the beaglebone black won't work at all? >>> >>> ljones >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/B51_9eAH9vE/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
