Re: [beagleboard] Re: Beaglebone black HDMI/VGA converter problems
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.orgwrote: 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=1371231750sr=8-2keywords=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.
Re: [beagleboard] Re: Beaglebone black HDMI/VGA converter problems
Oh, I totally understand where you are coming from. The only issue I have is that not everyone is you or me.Yes, it can be easily done. Other people notice these posts as well and I need to make sure there is a level set for those that try to do the same thing, blow up a board and then send it in to our RMA shop for us to fix. Everyone is free to do whatever they like to their board. But there are certain things they need to understand before doing so. Gerald On Wed, Mar 12, 2014 at 11:45 AM, Gerald Carpenter vermonttaxpa...@gmail.com wrote: 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.orgwrote: 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=UTF8qid=1371231750sr=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
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
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=UTF8qid=1371231750sr=8-2keywords=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.
Re: [beagleboard] Re: Beaglebone black HDMI/VGA converter problems
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=UTF8qid=1371231750sr=8-2keywords=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.
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
I agree with the post below. However I am now using a cheap Meritline HDMI to VGA adapter and powering it from the Beaglebone Black 5 vdc power source. I just had to hack into the adapter and find the wire that supplies +5vdc. I soldered a wire from the power barrel connector to the adapter circuit board, and now it works great. -- 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/groups/opt_out.
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
After a lot of frustration, I have finally got my HDMI to VGA adapter working. At first I got a very inexpensive adapter from Meritline. I could get the initial splash screen, but then nothing. Then I got a recommended adapter and cable that cost twice as much. I could get the initial screen for a few minutes, but then it disconnected. Reading a post on Sparkfun, I realized that the adapter was pulling too much current through the Beaglebone. I touched the capactors next to the HDMI port, and they were very, very hot just before the VGA monitor lost connection. So I took the adapter apart to find where the 5 volt power was coming in. A little checking and I found which pin supplies the 5 VDC to the HDMI cable. I traced the pin out to the adapter circuit board. Then I cut that wire and soldered a wire onto it. I ran that wire to the Beaglebone circuit board where the barrel connector connects power in. I connected the wire up, powered up the board, then powered on the VGA monitor, and everything works like a charm now! The Beaglebone Black just can't supply enough 5 volt current to run the adapter, so it needs to be powered directly from the 5 vdc source. -- 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/groups/opt_out.
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
OK, I stand corrected. I clicked through all the links, and the pictured working adapter *is* the USB powered one. I guess that is what I need. Kelton -- 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/groups/opt_out.
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
I stand corrected. I clicked through all the links, and the one they show *is* the USB-powered adapter, as sold by Amazon (made by Cable Matters). That's not what Adafruit sells, alas. Kelton -- 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/groups/opt_out.
[beagleboard] Re: Beaglebone black HDMI/VGA converter problems
I just bought a BBB along with a HDMI to VGA converter from Adafruit (long with the other accroutrements). The converter is very similar to the one pictured on the web page as compatible:.http://circuitco.com/support/index.php?title=BeagleBone_Black_Accessories. Note the one pictured is unpowered, or at least appears to be so, so I figured I would be fine. As you can guess, I have no video (sigh) Is there no way to get this to work with the unpowered adapter? The adapter cost almost as much as the BBB and I can't return it. Oh well... Kelton -- 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/groups/opt_out.
