Hello Gerald, Thank you for your reply. The power supplied through the PTC turned out to be the issue. On my HDMI to VGA converter, I removed the power coming from beaglebone microHDMI port and added external power supply and it is working fine. Earlier, even when I forced resolution, after 5 or 10 mins the PTC would become too hot and the monitor would go to to sleep, now It runs properly for a few hours.
Suteerth On Friday, 28 February 2014 23:20:57 UTC+5:30, Gerald wrote: > > 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] <javascript:>>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] <javascript:>. >> 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/d/optout.
