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qole is offline qole
2008-05-29 , 21:17
Moderator | Posts: 7,109 | Thanked: 8,820 times | Joined on Oct 2007 @ Vancouver, BC, Canada
#281
Hmm, I thought it was working successfully; I was able to use an old Apple Pro usb keyboard with the injector that didn't want to work without it. But I haven't tried something really power hungry yet, like a wifi adaptor or a bus-powered HDD yet. I'll try to do that in the next couple of days. It probably won't work. Benson's usually right.
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Benson's Avatar
Benson is offline Benson
2008-05-29 , 21:18
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#282
Other thought: From a nearby thread, this was posted. It's a pigtail version of the mini-B <--> female A adapter you offer now, and should be susceptible to the same rip-open, solder, and re-close mod. (I assume it's not OTG already, though Birick made no mention of software...) It won't (semi-?)rigidly hold a thumb-drive behind the Nokia, but it's probably the closest thing economically attainable.

The cable might also make a y-cable power-injection setup easier to make; it sounded as if you're thinking of adding that?

BTW, I'm still waiting to make my second order. (First order was before you had hubs, ethernet, etc. up.) I'm equipping a second tablet, for my sister, so I'll be watching to see the new stuff. She's not back in the US till July, so I'll wait a while and see what you come up with for a while before I order. I'm not quite getting one of everything, but it's close...

@Qole:
Maybe the keyboard doesn't mess with power negotiations, even though it uses a little more. But it could also be an issue with start-up current; current can actually peak before negotiation, and the device is gonna negotiate for operating power. So on really low-current sources, failure from the get-go. But with a decent current source (or maybe just a big fat capacitor added), it gets started, and is then fine with no extra power.
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Last edited by Benson; 2008-05-29 at 21:22.
 
TokyoDan is offline TokyoDan
2008-05-29 , 22:53
Posts: 155 | Thanked: 19 times | Joined on May 2008 @ Tokyo, Japan
#283
This adapter doesn't look like it will work with the N810 as the N810 uses a Micro USB connector.

Originally Posted by jolouis View Post
The N800 USB host mode thread has been going on far too long now and has become quite lengthy in both it's breadth and content, so I'm going to start a new thread for this that kind of picks up where we left off there.

Here's the scenario: If you're running OS 2008, the N800 can automatically switch between host mode and client mode with a specially modified cable/adapter. Although there are many handy people on the forums here, I know there has been an expressed desire by some of the less "soldering iron hands on" looking for a pre-made solution, so here's my proposal:

I'm prepared to offer "professionally modified" USB adapters and cables for use with the N800 OTG. At this point I'm starting with just a simple Mini B (plugs into the N800) to Female A (regular USB devices plug into it) adapter that's about 2 inches long, and when connected with automatically put the N800 into host mode... no software hacks or special scripts required.

The Adapters are now available here
If you want to resell them in your local area there's also a reseller's pack of 25 available:
http://www.electronicproductonline.c...oducts_id=1793

Shipping costs are:
International (Air) is flat $11.00
US Standard Mail (Air) is flat $9.00
Canada Standard is flat $4.00

Note that the US Mail price has changed; this is because all shipments are now Air Mail instead of ground due to the number of complaints regarding the delivery time of ground shipments.

The attached picture gives you an idea of what the adapters look like. You can find more information about possible uses/what works and what's being tested on the Wiki Page


There has also been some interest expressed for an actual "dongle" type of cable with a similar sort of function. Here's my question:

How many people would be interested in purchasing the modified adapter, and how much interest is there in a "dongle" type of cable for the same purpose?

The modded adapter at this point is looking to be somewhere about $10-15 Canadian + shipping; it may work out to be a little lower than that depending on quanities/etc. I can't find a source for a short dongle with the appropriate connectors yet, but the if there's enough interest I'm sure I can track one down somewhere.

I'm getting the first batch of adapters in early next week, so I'll post back the link here, but in the meantime I'm looking for feedback: who's interested?

-Rob
 
Benson's Avatar
Benson is offline Benson
2008-05-29 , 23:02
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#284
Well... yes. That's why the thread title is "N800 USB OTG Adapters/Dongles"...

If you look at this recent post: #173 in this thread
Jolouis is coming out with a micro-B to mini-B pigtail, which (in combination with one of these) would make it work with the N810.
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Zebee is offline Zebee
2008-05-30 , 01:59
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#285
Originally Posted by jolouis View Post
Just a general update for everyone regarding N800/N810 accessories:
I will be offering N810 "OTG bundles" very shortly (as soon as my shipment comes in) that will include a MicroUSB to MiniUSB dongle cable (6" I believe, might be slightly shorter) along with the standard miniUSB OTG adapter.
Any reason why no full size USB socket to MicroOTG? A 2" to 6" one of those cables would be perfect for me.

Zebee
 
jolouis is offline jolouis
2008-05-30 , 12:58
Posts: 631 | Thanked: 837 times | Joined on May 2007 @ Milton, Ontario, Canada
#286
At this point the reason that there's no full sized USB to MicroUSB is that microUSB is EXTREMELY difficult to locate, let alone use in custom fabrication work. Mini USB has been around for quite a while now, while MicroUSB is really only, what, a few months old in terms of actual production, and close to a year or so in terms of "general announcements"; as time goes on it should become easier to locate such a cable/adapter, but in the meantime we have to improvise.

Benson, thanks for the info I did spot that one the other day; I've got to do a bit more looking into it to see if the guy is open to volume discounting to make the costs to everyone here a bit closer to par.

As far as a power injector goes, I don't think it's really worth while to do because of the software requirements and potential damage you can do to your tablet if you don't do things properly (i.e. disable current limit in software and then forget to plug in your external power and overdraw the tablet's USB power source). I hope that the tablets have internal overload shutdowns, but I've blown up USB regulator chips on motherboards before doing that (and you'd have thought THEY would have overload protection) and had to live without powered USB ports for a while which is definately NOT fun! However what I am tinkering with is the possibility of moding up a "1 port" powered USB hub, essentially creating a power injector the "right way". I should be able to get it to be about the size of a postage stamp, but this is just based on general ideas and theories thus far so I'll keep everyone posted on how it works out...

Thanks for all the feedback so far, if there are any other cables/accessories etc you guys are looking for just post up and I'll do my best to track them down/build them/make them available! (btw don't know if anyone's interested but I've now got Mic/Headphone Y cables as well for N800/N810).

Thanks,
-Rob
 

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Texrat's Avatar
Texrat is offline Texrat
2008-05-30 , 13:36
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#287
Originally Posted by TokyoDan View Post
This adapter doesn't look like it will work with the N810 as the N810 uses a Micro USB connector.
I have it working perfectly with my N810 by including the necessary pigtail (Motorola part).
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Texrat's Avatar
Texrat is offline Texrat
2008-05-30 , 13:40
Posts: 11,700 | Thanked: 10,045 times | Joined on Jun 2006 @ North Texas, USA
#288
Originally Posted by jolouis View Post
(btw don't know if anyone's interested but I've now got Mic/Headphone Y cables as well for N800/N810).

Thanks,
-Rob
Of course we're interested!

Ordered!

But... ack, the shipping cost...
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jolouis is offline jolouis
2008-05-30 , 14:07
Posts: 631 | Thanked: 837 times | Joined on May 2007 @ Milton, Ontario, Canada
#289
Sorry about that Tex, I forgot to move into the special "N8x0 shipping mode"! You'll get an email shortly about it! The shipping cost should be flat rate same as the other stuff.

Thanks,
-Rob
 
Benson's Avatar
Benson is offline Benson
2008-05-30 , 14:41
Posts: 4,930 | Thanked: 2,272 times | Joined on Oct 2007
#290
Originally Posted by jolouis View Post
I hope that the tablets have internal overload shutdowns, but I've blown up USB regulator chips on motherboards before doing that (and you'd have thought THEY would have overload protection) and had to live without powered USB ports for a while which is definately NOT fun!
Well, it's been reported on these forums (don't remember by whom) that the N800 does indeed have hardware overload protection; I haven't worked with it at all.
However what I am tinkering with is the possibility of moding up a "1 port" powered USB hub, essentially creating a power injector the "right way". I should be able to get it to be about the size of a postage stamp, but this is just based on general ideas and theories thus far so I'll keep everyone posted on how it works out...
That's indeed the right way, if you can get it small enough to be equally convenient. That spider-cable hub you have, BTW, looks quite interesting.

Unfortunately, if it doesn't think it's a powered hub, you can't do much the right way, but I was thinking of hacking one up. It's got a mini-B connector, so with some work that could be interfaced to the upstream (instead of one of the downstream), and use the male A intended as upstream as a power-only input, for use with any USB power supply, or (unlawful, evil, and non-negotiatingly) off a computer's USB port.

Do you know if that case comes apart well? (I'm thinking unsoldering the cables from the PCB, probably adding wires to reach, and resoldering the data wires in different places.) Also, if you've had one apart, do you know if it's got 5 conductors in the mini-B cable? OTG-ifying without tearing the connector open would be sweet.

I'm willing to buy one and make the first prototype, now that I've got time, but if it works out, I'll publicly document it, and you could sell those hubs pre-modded too. (Just don't point people at a ''dangerous'' kernel if you don't want responsibility; it'll just work as a bus-powered hub if you don't install a tweaked kernel, and still be a little slicker than the current combo of that hub and the OTG adapter... plus if it's hooked up that way, the power users can do it themselves.)

Thanks for all the feedback so far, if there are any other cables/accessories etc you guys are looking for just post up and I'll do my best to track them down/build them/make them available!
Well, here's a couple:

USB-VGA is working (with certain SIS chipsets); it's still pretty experimental. But you could offer the USB2VGA2
(known working) or similar... That sucker needs a powered hub or injector+kernel, too, of course. I don't know that you could beat the newegg price, but ordering all one place does save shipping and time, so it might be good.

Battery pack for the powered hub you do sell, as well as for any 1-port powered hub or power injector you might come up with? Bonus points if it can be used either with the hub/injector or as an extender for the N8x0...
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