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by chithanh
Thu Jul 11, 2019 4:48 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

USB-C and mini HDMI Note that the Raspberry Pi 4 uses Micro HDMI not Mini HDMI. Mini HDMI was used in the Pi Zero (and I found that questionable too over e.g. MHL, but as an extreme low-cost device used mostly in fixed installations it did not bother me much). OMG! Should I start to cry because I h...
by chithanh
Tue Jul 09, 2019 10:08 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

I was talking about two upright HDMI connectors like this one: http://www.morethanall.com/products/index/btype_id/1/type_id/77/id/2117 https://antenk01.manufacturer.globalsources.com/si/6008830656883/pdtl/HDMI-connector/1096314798/HDMI-Upright-Receptacle-Connectors.htm Those also raise the board he...
by chithanh
Fri Jun 28, 2019 11:38 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Ok, but are there good arguments against dual upright HDMI connectors? Z height maybe? Yes the height of two stacked normal sized HDMI ports, with height space for the plugs between the two would make the PI excessively higher. Such connectors are typically 18mm high, and 18mm deep, so they also ta...
by chithanh
Fri Jun 28, 2019 11:30 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Rewind 7 years and you will find lots of grumbling in these forums and in other #EdTech places from teachers whose schools had no spare HDMI monitors but lots of VGA displays, and no spare usb keyboards but cupboards full of ps/2 ones.. I am not saying that you could grab any old trash, and expect ...
by chithanh
Fri Jun 28, 2019 10:59 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Having two different display connectors on the board for the same display type (HDMI) would be insane. Both from a users point of view, and a manufacturing point of view. Ok, but are there good arguments against dual upright HDMI connectors? Z height maybe? Once 200/300 quid TV's are all using USB-...
by chithanh
Thu Jun 27, 2019 9:49 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

So on one hand you want large compatible connectors so you don't have to carry around adaptors and on the other you want future USB-C/Displayport capability that would require most people to buy adaptors. I don't get it ? I think you misunderstand. I would like to have at least one full-size HDMI c...
by chithanh
Thu Jun 27, 2019 8:03 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

During the AMA with Eben Upton at Tom's Hardware he answered some questions about the display output posted by me and others. Summary: Dual deck / stacked HDMI connectors was considered, but rejected due to Torque (that was mentioned by jamesh already), EMC issues, and increased Z height Upright HDM...
by chithanh
Wed Jun 26, 2019 9:16 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Converters and cables are quite easy to find. That completely depends on where you live and which markets you can access. Sure, if you live in an urban area in a developed country, then you can just walk into the next electronics mega-store and buy one. One of the really, really great things about ...
by chithanh
Wed Jun 26, 2019 3:48 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Yes, and using a single USB-C for all of power/data/display is becoming the norm. You can today buy mid-range monitors that have USB-C connector for all of these at once, and incorporate USB hubs, and sometimes even Ethernet. For easy standards-based single cable docking on smartphones and notebooks.
by chithanh
Wed Jun 26, 2019 3:29 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

Not quite that easy. To get full speed output you need connections inside the SoC that move the pixels from the graphics compositor (HVS) to the output - we call these pixelvalves - and there simply isn't a route from there to the USB system I must admit that this statement surprises me. There exis...
by chithanh
Wed Jun 26, 2019 3:02 pm
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Re: Reasoning behind dual Micro HDMI, and potential future alternatives?

james, 6by9, thank you for your replies and explanations. The cost difference for micro HDMI to HDMI leads vs standard HDMI isn't huge. A quick search on Ebay shows leads from £1.70. The lead we sell is £4 (+VAT), which still isn't that expensive. Any sensible distributor selling the Pi will also be...
by chithanh
Wed Jun 26, 2019 11:26 am
Forum: General discussion
Topic: Reasoning behind dual Micro HDMI, and potential future alternatives?
Replies: 76
Views: 7028

Reasoning behind dual Micro HDMI, and potential future alternatives?

The product page of the Raspberry Pi 4 says: We've listened to your feedback: with Raspberry Pi 4, you can run two monitors at once — and in 4K, too! I think that allowing dual displays is commendable and it makes the Raspberry Pi 4 much more useful for many desktop users. However, the decision to g...
by chithanh
Wed Jun 26, 2019 2:06 am
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 105676

Re: Raspberry Pi 4 Thread - general discussion

Thank you for raising the bar again what kind of computing hardware you can buy for $35. And setting the new reference for $45 and $55 too. Any chance it supports DisplayPort over USB-C? No, USB2.0 OTG only. This is understandable given the low price point. But I would like to kindly ask you to stro...

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