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[Q] Nook "Powered" USB Host Support

OP nukednook

29th March 2012, 02:09 PM   |  #1  
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So I am transforming my Nook color into a point of sale system and need USB Host support for serial access (for various peripherals) as well as USB HID access. I managed to get USB host to work on CM 7 ... Keyboard, mouse and my HID credit card reader work but it seems like I can't charge the nook at the same time. Eg draining power while being USB host work great... . I tried creating a Micro to Mini USB adapter that connects the nookcolor to a powered 5v 2A USB hub with attached Point of Sale devices ( card reader, wieless modules, microcontollers/arduino etc... but for whatever reason even with a powered hub I am unable to maintain the nook's charge while the Nook color is in USB Host / External VBus mode... Any suggestions? Does CM9 with Android ICS solve this issue?

Tonight I tried to send 5v directly to the board to see if I can power/charge the nook with no battery and to charge the Nook via a +5VDC so I can free up USB host mode to be able to access any device/peripheral on the powered USB Hub... This should work but I am a bit worried about how reliable USB host support is for Nookcolor
29th March 2012, 07:25 PM   |  #2  
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I don't know of any way to fully maintain the Nook charge through USB while its operating. The standard USB micro plug cannot supply enough current even when connected to a USB charger 5v. That's why the B&N adapter has a special plug on it, to supply additional current.
29th March 2012, 08:43 PM   |  #3  
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There was a post about adding inductive charging to the nook. Perhaps you could that info to make a separate power input?

http://forum.xda-developers.com/show....php?t=1212572

I've seen mag strip readers that work from the headphone jack of android phones. I don't know that they would work with the nook though. If you can live without the keyboard and mouse.

Also, you may want to be careful with Vbus on and powered hubs. You might cook your nook.

---------- Post added at 02:43 PM ---------- Previous post was at 02:28 PM ----------

http://www.merchantequipment.com/ID_...unimag-pro.htm

http://www.merchantequipment.com/ID_...mis-unimag.htm

Something like those is what i'm talking about.
Last edited by Peoplephobic; 29th March 2012 at 08:32 PM.
31st March 2012, 08:24 PM   |  #4  
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I just read this post about a nook install in a Jeep

They had this micro usb plug that has a board with solder points.



Perhaps you could use something like that and a few micro usb female cables or adapters to make some kind of a splitter.
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