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 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.
