External power will work, as that is the one we recommend. The yellow thing is a PTC, not a fuse. It is designed to get hot and as a result increase the resistance with the level of heat to reduce the current flow.
Gerald On Fri, Feb 28, 2014 at 11:46 AM, <[email protected]> wrote: > Instead of changing the fuse and (probably) violating the warranty on the > BeagleBone black, if I hack my microHDMI to VGA adapter and give it > external power, would it work ? > Interestingly, the yellow thing does get incredibly hot and I see nothing > past the beaglebone flash screen while boot, that too only after I edited > the uEnv.txt file. > however the edid info obtained by logging into beaglebone through SSH > (putty) shows 1 available resolution 1440x900@60Hz > with a different HDMI to VGA adapter 2 options are available 1920x1080 @ > 60Hz and another one 1600 something by something. would that be issue of > power supply to the HDMI to VGA converter or something else ? > > thanks in advance > > > On Monday, 23 December 2013 15:25:31 UTC+5:30, [email protected] wrote: >> >> >>> Feel free to do this modification. Just remember it violates the >>> warranty. I do not intend to power the world over HDMI connector. Just the >>> EEPROM for the purpose of reading the EDID. This is the way the board was >>> design and is not a "feature". >>> >>> While the TPS65217 can handle more, it does have a limit. >>> >>> Gerald >>> >> >> Hi Gerald, >> >> Agree :) But at least consider a bigger fuse, a 250mA would be perfect. >> Those PTCs are not very good when current is near maximum point. They not >> actually switch, but increase their resistance due to natural construction >> and revert very slowly to initial condition (minutes). BTW this one has 4.5 >> ohms in normal state so when a big HDMI consumer will draw there will be no >> more +5V anyhow. >> >> My reason is quite simple... I spent around 45 euro for board with all >> taxes and another 20 or more for cheapest HDMI adapter I found. So almost >> 50% from price and I see no point to spent more for a better adapter. >> >> Regards, >> Edouard Gora, YO3HCV >> >> -- > 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 [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
